Relevant bibliographies by topics / Farm manure in methane production

Academic literature on the topic 'Farm manure in methane production'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 July 2024

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Journal articles on the topic "Farm manure in methane production"

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Adghim, Mohamad, Mohamed Abdallah, Suhair Saad, Abdallah Shanableh, and Majid Sartaj. "Assessment of the biochemical methane potential of mono- and co-digested dairy farm wastes." Waste Management & Research 38, no. 1 (September 9, 2019): 88–99. http://dx.doi.org/10.1177/0734242x19871999.

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This study aimed to evaluate the methane potential of mono- and co-digested dairy farm wastes. The tested substrates included manure from lactating, dry, and young cows, as well as waste milk and feed waste. The highest methane yield was achieved from the lactating cow manure, which produced an average of 412 L of CH4 kg−1 volatile solids, followed by young and dry cow manures (332 and 273 L of CH4 kg−1 volatile solids, respectively). Feed and milk yielded an average of 325 and 212 L of CH4 kg−1 volatile solids, respectively. Co-digesting the manures from lactating and young cows with feed improved methane production by 7%. However, co-digesting the dry cow manure with feed achieved only 85% of the calculated methane yield. Co-digesting manure and milk at a ratio of 70:30 enhanced the methane potential from lactating, dry, and young cow manures by 19, 30, and 37%, respectively. Moreover, co-digesting lactating, dry, and young cow manures with milk at a ratio of 30:70 enhanced the methane yield by 60, 30, and 88%, respectively. The cumulative methane production of all samples was accurately described using the Gompertz model with a maximum error of 10%. Carbohydrates contributed the most to methane potential, while proteins and lipids were limiting.
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Pyykkönen, Ville, Erika Winquist, Ari-Matti Seppänen, Markku Vainio, Elina Virkkunen, Kari Koppelmäki, and Saija Rasi. "Anaerobic Digestion of Solid Agricultural Biomass in Leach-Bed Reactors." Bioengineering 10, no. 4 (March 29, 2023): 433. http://dx.doi.org/10.3390/bioengineering10040433.

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This study focuses on the feasibility of the dry anaerobic digestion of solid agricultural biomass for efficient renewable-energy production and nutrient recycling. Methane production and the amount of nitrogen in the digestates were measured in pilot- and farm-scale leach-bed reactors. In the pilot scale, with a digestion time of 133 days, the methane production of a mixture of whole crop fava bean and horse manure corresponded to 94% and 116%, respectively, of the methane potentials of the solid substrates. The mono-digestion of fava beans resulted in relatively low methane production (production/potential ratios of 59% and 57%). In two full-scale experiments, the methane production of mixtures of clover-grass silage, chicken manure, and horse manure corresponded to 108% and 100% of their respective methane potentials with digestion times of 117 and 185 days. In co-digestion, the production/potential ratios were similar in the pilot and farm experiments. High nitrogen loss was observed in the farm scale when the digestate was stored in a stack covered with a tarpaulin during summertime. Thus, although the technology seems promising, attention needs to be paid to management practices to minimise nitrogen losses and greenhouse gas emissions.
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Alemu, Aklilu W., Kim H. Ominski, Mario Tenuta, Brian D. Amiro, and Ermias Kebreab. "Evaluation of greenhouse gas emissions from hog manure application in a Canadian cow–calf production system using whole-farm models." Animal Production Science 56, no. 10 (2016): 1722. http://dx.doi.org/10.1071/an14994.

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The development of beneficial management practices is a key strategy to reduce greenhouse gas (GHG) emissions from animal agriculture. The objective of the present study was to evaluate the impact of time and amount of hog manure application on farm productivity and GHG emissions from a cow–calf production system using two whole-farm models. Detailed model inputs (climate, soil and manure properties, farm operation data) were collected from a 3-year field study that evaluated the following three treatments: no application of hog manure on grassland (baseline); a single application of hog manure on grassland in spring (single); and two applications of hog manure as fall and spring (split). All three treatments were simulated in a representative cow–calf production system at the farm-gate using the following whole-farm models: a Coupled Components Model (CCM) that used existing farm component models and the Integrated Farm System Model (IFSM). Annual GHG intensities for the baseline scenario were 17.7 kg CO2-eq/kg liveweight for CCM and 18.1 kg CO2-eq/kg liveweight for IFSM. Of the total farm GHG emissions, 73–77% were from enteric methane production. The application of hog manure on grassland showed a mean emission increase of 7.8 and 8.4 kg CO2-eq/kg liveweight above the baseline for the single and split scenarios, respectively. For the manured scenarios, farm GHG emissions were mainly from enteric methane (47–54%) and soil nitrous oxide (33–41%). Emission estimates from the different GHG sources in the farm varied between models for the single and split application scenarios. Although farm productivity was 3–4% higher in the split than in single application (0.14 t liveweight/ha), the environmental advantage of applying manure in a single or split application was not consistent between models for farm emission intensity. Further component and whole-farm assessments are required to fully understand the impact of timing and the amount of livestock manure application on GHG emissions from beef production systems.
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Thayai, Sorrasak, and Supawat Vivanpatarakij. "Biogas Production from Swine Manure Co-Digestion with Hyacinth." Advanced Materials Research 953-954 (June 2014): 304–8. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.304.

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The suitable ratio between swine manure and hyacinth for biogas production was considered. From Ratchaburi Province, the swine manure and hyacinth were taken from the pig farm and natural canal, respectively. For this study, mixing ratios between swine manure with hyacinth are 0:100, 25:75, 50:50, 75:25 and 100:0, considered by dry basis. The anaerobic digesters were studied total mixing volume 300 ml in 500 ml volumetric flask on shaker. Total dry substrate is 2 g every ratio, swine manure and hyacinth. And microbial inoculum from pig farm is 3 g (dry basis). The experimental results showed the proportion of 0:100 illustrate the maximum quantity of biogas accumulated equal 243.48 ml. And the ratio of 100:0 shows the minimum cumulative biogas volume equal 33.60 ml. The analysis of the gas production, the blend of swine manure per hyacinth has the highest percentage of methane ratio is 0:100 (CH4=6.4%), and the lowest percentage is the ratio of 100:0 (CH4=0.5 %). For carbon dioxide production, the highest percentage of carbon dioxide is ratio of 0:100 (CO2=4.1 %) and the lowest is ratio 100:0 (CO2=0.9 %). Percentage of methane to compare with total percentage of methane and carbon dioxide has the highest percentage is the ratio of 25:75 (CH4=63.9 %), and the lowest percentage is the ratio of 100:0 (CH4=35.7 %). The highest to compare the lowest, percentage of methane per total percentage of methane and carbon dioxide is percentage of methane ratio 25:75 more than ratio 100:0 is 1.79.
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Edalati, Abdolhossein, Yike Chen, Tyler John Barzee, Hamed M. El-Mashad, and Ruihong Zhang. "Effect of Mechanical Solids Separators on Potential Reduction of Methane Emissions From Dairy Manure Storage." Journal of the ASABE 66, no. 3 (2023): 689–701. http://dx.doi.org/10.13031/ja.15371.

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Highlights Four mechanical manure separators were evaluated in on-farm studies. Mass balances and biochemical methane potential tests were conducted to measure on-farm separation efficiencies. Separator performance depended on environmental, material, and design factors. Over 70% solids separation and methane emission reduction potentials were achieved. Abstract. The separation efficiencies of four mechanical solid-liquid separation technologies and their effect on the reduction of methane production potential from dairy lagoons were studied using on-farm separator measurements and laboratory biomethane potential tests. The studied technologies included 1-stage sloped dual-screen, 2-stage sloped dual-screen, 1-stage horizontal scraped screen, and 1-stage sloped single-screen separators. The technologies were evaluated across various seasons on four dairies in California. On-farm sampling and measurements of the influent of flushed manure and the mass of the solids separated, as well as in-laboratory measurements of methane (CH4) production potential, were carried out. A mass balance approach was employed to determine the removal efficiencies of total and volatile solids (TS and VS) and nutrients, as well as methane emission reduction potential. The performance of the separators depended on manure characteristics, system design (e.g., screen size and orientation), separator operation and management (e.g., manure flow rate), and manure processing pit type and configuration. Among the four studied separator systems, the 2-stage sloped dual-screen separator showed the highest average TS and VS removal efficiencies, and methane emission potential reduction of 52.5%, 59.7%, and 55.8%, respectively. The 1-stage horizontal scraped screen separator had the lowest TS and VS removal efficiencies, and methane emission reduction potential of 6.3%, 9.3%, and 4.9%, respectively. The results have potential implications for nutrient and greenhouse gas management strategies and/or policies in agriculture. Keywords: Greenhouse gas, Lagoon, Manure management, Separation efficiency, Settling basin, Solid-liquid separation, Sustainable agriculture.
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Coppolecchia, Damiano, Davide Gardoni, Cecilia Baldini, Federica Borgonovo, and Marcella Guarino. "The influence on biogas production of three slurry-handling systems in dairy farms." Journal of Agricultural Engineering 46, no. 1 (April 21, 2015): 30. http://dx.doi.org/10.4081/jae.2015.449.

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Handling systems can influence the production of biogas and methane from dairy farm manures. A comparative work performed in three different Italian dairy farms showed how the most common techniques (scraper, slatted floor, flushing) can change the characteristics of collected manure. Scraper appears to be the most <em>neutral</em> choice, as it does not significantly affect the original characteristics of manure. Slatted floor produces a manure that has a lower methane potential in comparison with scraper, due to: a lower content of volatile solids caused by the biodegradation occurring in the deep pit, and a lower specific biogas production caused by the change in the characteristics of organic matter. Flushing can produce three different fluxes: diluted flushed manure, solid separated manure and liquid separated manure. The diluted fraction appears to be unsuitable for conventional anaerobic digestion in completely stirred reactors (CSTR), since its content of organic matter is too low to be worthwhile. The liquid separated fraction could represent an interesting material, as it appears to accumulate the most biodegradable organic fraction, but not as primary substrate in CSTR as the organic matter concentration is too low. Finally, the solid-liquid separation process tends to accumulate inert matter in the solid separated fraction and, therefore, its specific methane production is low.
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Febrisiantosa, Andi, J. H. Lee, and H. L. Choi. "Greenhouse gas emissions from cattle production sector in South Korea." Jurnal Ilmu Ternak dan Veteriner 21, no. 2 (July 1, 2016): 112. http://dx.doi.org/10.14334/jitv.v21i2.1359.

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<p class="abstrak2">South Korea has declared to reduce greenhouse gas emissions by 30% compared to the current level by the year 2020. The greenhouse gas emissions from the cattle production sector in South Korea were evaluated in this study. The greenhouse gas emissions of dairy cattle, Non-Korean native cattle, and Korean native (Hanwoo) cattle production activities in 16 local administrative provinces of South Korea over a ten-year period (2005–2014) were estimated using the methodology specified by the Guidelines for National Greenhouse Gas Inventory of the IPCC (2006). The emissions studied herein included methane from enteric fermentation, methane from manure management, nitrous oxide from manure management and carbon dioxide from direct on-farm energy use. Over the last ten years, Hanwoo cattle production activities were the primary contributor of CH<sub>4</sub> from enteric fermentation, CH<sub>4</sub> from manure management, NO<sub>2</sub> from manure management and CO<sub>2</sub> from on-farm energy use in the cattle livestock sector of South Korea, which comprised to 83.52% of total emissions from cattle production sector.</p>
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Kaparaju, P., S. Luostarinen, E. Kalmari, J. Kalmari, and J. Rintala. "Co-digestion of energy crops and industrial confectionery by-products with cow manure: batch-scale and farm-scale evaluation." Water Science and Technology 45, no. 10 (May 1, 2002): 275–80. http://dx.doi.org/10.2166/wst.2002.0352.

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The possible co-digestion of energy crops and industrial confectionery by-products with cow manure was evaluated firstly, through long-term batch experiments and secondly, in a farm-scale digester. In batch assays, digestion with mesophilically digested cow manure as inoculum resulted in specific methane yields (m3 kg−1 VSadded waste) of 0.35 for grass hay (particle size &lt;1.0 cm); 0.26 for oats (0.5 cm) and 0.21 for clover (2.0 cm) harvested at vegetative stage and 0.14 (2.0 cm) for clover harvested at flowering stage. Specific methane yields (m3 kg−1 VSadded waste) for confectionery by-products were 0.37 for chocolate, 0.39 for black candy and 0.32 for confectionery raw material. Out the three particle sizes (2.0, 1.0 and 0.5 cm) tested, particle size of 1.0 cm was found ideal for digestion of grass hay and clover while, particle size reduction did not influence methane production from oats. Stage of the crop influenced the methane yields, with clover harvested at vegetative stage yielding 33% higher methane than when harvested at flowering stage. An approximate 60% enhancement in methane yield was noticed with the co-digestion of industrial confectionery wastes with cow manure in a full-scale farm digester.
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Mazurkiewicz, Jakub. "Energy and Economic Balance between Manure Stored and Used as a Substrate for Biogas Production." Energies 15, no. 2 (January 6, 2022): 413. http://dx.doi.org/10.3390/en15020413.

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The aim of the study is to draw attention to the fact that reducing methane and nitrous oxide emissions as a result of traditional manure storage for several months in a pile is not only a non-ecological solution, but also unprofitable. A solution that combines both aspects—environmental and financial—is the use of manure as a substrate for a biogas plant, but immediately—directly after its removal from the dairy barn. As part of the case study, the energy and economic balance of a model farm with dairy farming for the scenario without biogas plant and with a biogas plant using manure as the main substrate in methane fermentation processes was also performed. Research data on the average emission of ammonia and nitrous oxide from 1 Mg of stored manure as well as the results of laboratory tests on the yield of biogas from dairy cows manure were obtained on the basis of samples taken from the farm being a case study. The use of a biogas installation would allow the emission of carbon dioxide equivalent to be reduced by up to 100 Mg per year. In addition, it has been shown that the estimated payback period for biogas installations is less than 5 years, and with the current trend of increasing energy prices, it may be even shorter—up to 4 years.
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OSMONOV, J. Y., U. E. KARASARTOV, V. S. KURASOV, and I. E. TURDUEV. "BIOGAS TECHNOLOGY - IS AN EFFECTIVE WAY OF FARM ANIMAL MANURE PROCESSING." Техника и технологии в животноводстве, no. 1 (2024): 104–10. http://dx.doi.org/10.22314/27132064-2024-1-104.

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The renewable energy sources (VIE) widespread using makes it possible the fossil fuels’ consumption that pollute the environment reducing significantly. One of the VIE types is biomass, which tends the agricultural production, especially livestock intensification growing. The main type of biomass is manure; at it processing by biogas technology using, it provides biogas, biofertilizer and electric energy, that are necessary for soil fertility and energy supply to rural consumers increasing. At the same time, biogas technology helps the manure disinfection’s problems solving, since fresh manure is an environmental pollutant by harmful gases (methane, ammonia, hydrogen sulfide, etc.) emitting. The livestock methane emissions’ amount is about 16%. The authors have developed small sized biogas manure processing installation, to the small agricultural enterprises’ conditions adapting. Distinctive features of the installation are: sawdust from reed plants for manure preparation loading into the bioreactor; of an external energy source from renewable resources (sun, wind, etc.) to heat the bioreactor in cold weather using; biofertilizer into dry residue and liquid separating; manure different types to carbon and nitrogen at C /N = 20 ratio mixing. These features make it possible the quality of biofertilizer, since reed plants contain vitamins C, carotene, starch, carbohydrates and proteins improving, as well as the crust formation to prevent; of biogas by observing the temperature regime inside the reactor and the ratio C /N = 20 output increasing; manure next fresh portion is accelerated by liquid part feeding of the biofertilizer back into the bioreactor’s process fermentation.
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Dissertations / Theses on the topic "Farm manure in methane production"

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Christophersen, Claus. "Grain and artificial stimulation of the rumen change the abundance and diversity of methanogens and their association with ciliates." University of Western Australia. School of Animal Biology, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0114.

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[Truncated abstract] In Australia, there is pressure to reduce the amount of methane produced by ruminant livestock because they are the single largest source of methane emitted from anthropogenic sources, accounting for 70.7% of agricultural methane emissions. In addition, methane production represents a loss of gross energy intake to the animal. The organisms that are responsible for methane production in the animal gut are a distinct group of Archaea called methanogens. Methanogens occupy three different niches within the rumen. Some live freely in the rumen digesta (planktonic), others are attached to the outer surface of the rumen ciliates (ectosymbiotic), and some reside within the ciliates (endosymbiotic). The types and number of methanogens, as well as rumen ciliates and their symbiotic interactions, influence the amount of methane produced from the rumen. These factors in turn are affected by many factors, including diet and ruminal retention time. In this thesis, I tested the general hypothesis that increasing the amount of grain in the diet and reducing the retention time would affect the abundance and diversity of methanogens in their different niches, including their association with ruminal ciliates. Twenty-four fistulated sheep were used in a complete factorial design with the sheep randomly divided into four groups. ... The change in DGGE banding patterns and Shannon indices when sheep were fed grain indicated that the types of methanogens changed when sheep were fed low and high grain diets, but their diversity did not. In contrast, the diversity of rumen ciliates decreased when sheep were fed a high grain diet. A total of 18 bands from the DGGE analysis of the ciliates were sequenced. All except one, which was 98% similar to Cycloposthium sp. not found previously in the rumen, matched the sequences for previously identified rumen ciliates. Some of the rumen ciliates identified were not present in sheep fed the high grain diet. On a high grain diet, methanogens associate endosymbiotically with rumen ciliates to get better access to hydrogen. It appears that the association between methanogens and rumen ciliates is dictated by the availability of hydrogen in the rumen and not the generic composition of the ciliate population. Furthermore, endosymbiotic methanogens appear to produce less methane than methanogens in other niches. The pot scrubbers did not change ruminal retention time but they did reduce the acetate/propionate measurements observed in sheep on the high grain treatment. The reason why pot scrubbers had this effect remains unknown, but it is interesting to consider that some physical interaction has occurred between the pot scrubbers, the grain and the sheep that has improved the fermentation parameters in sheep fed a high grain diet. The results from this study have advanced our understanding of the interaction between methanogens and ruminal ciliates, and methanogenesis in the rumen in response to dietary changes and mechanical challenges. Extending this work to look more specifically at the species of methanogens that are most closely linked to high methane production and how they interact with the ruminal ciliates will be critical for manipulating enteric greenhouse gas emissions.
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Kalén, Jonas, and Nathan Åkerlund. "Gårdsbaserad biogas på Nya Skottorp : utvärdering och optimering av anläggningen och uppgradering av biogasen." Thesis, Högskolan i Halmstad, Energiteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-22566.

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Biogas is an expanding sector within the broad field of agriculture and animal production. Small-scale biogas offers local combined power and heating production and the substrate is transformed into high-quality biological fertilizer. This bachelor thesis focuses on a pig farm in south-western Sweden, where biogas is produced from pig manure, evaluates and suggests ways of optimizing the process and investigates whether investing in an upgrading plant would be a feasible and more cost-efficient option. The results show that the biogas plant is working well, although the production differs from the original plans. This shows in turn that planning and examining the basic conditions before making the investment is of great importance, as well as monitoring and keeping detailed statistics of the running process. Logistical factors make optimizing the process through additional substrates difficult. The thesis shows that investing in a Biosling upgrading plant would be a profitable option, supposing that the upgraded gas is sold via the natural gas infrastructure. Furthermore, many farmers are interested in producing their own fuel for tractors and other machines, which offers more future alternatives for the upgraded biogas. However, biogas producers in Sweden today are not offered any particular subsidies, which makes it especially hard for small-scale producers.
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Wetzel, Sharon. "The application of thermophilic anaerobic digestion in the degradation of poultry waste." Thesis, University of Exeter, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391214.

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Hernandez, Pardo Mario Andres. "Hydrogen production from anaerobic co-digestion of coffee mucilage and swine manure." Phd thesis, Ecole des Mines de Nantes, 2012. http://tel.archives-ouvertes.fr/tel-00778944.

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This research investigates an alternative approach to the use of two wastes from agricultural and livestock activities developed in Colombia. Swinemanure and coffee mucilage were used to evaluatean anaerobic co-digestion process focused on hydrogen production. In addition, the aims covered a further stage in order to close the cycle of the both wastes. The thesis was conducted in three phases : 1. Evaluation of hydrogen production from the co-digestion of coffee mucilage and swine manure during dark fermentation ; 2. Trends over retention time through the monitoring of microorganisms by quantitative PCR and other parameters incluiding pH, oxidation reduction potential, and hydrogen partial pressure ; 3. Treatment of the effluent from hydrogen production process by anaerobic digestion with methane production. The experimental results showed that mixtures of both wastes are able to produce hydrogen. A substrate ratio of 5:5, which was associated with a C/N ratio of 53, was suitable for hydrogen production. Moreover, the stability and optimization of the process were evaluated by increasing the influent organic load rate. This wasthe best experimental condition in terms of average cumulative hydrogen volume, production rate and yield which were 2661 NmL, 760 NmLH2/Lwd and 43 NmL H2/gCOD, respectively. This performance was preserved over time, which was verified through the repetitive batch cultivation during 43 days. Two trends were identified over retention time associated with similar cumulative hydrogen, but with differences in lag-phase time and hydrogen production rate. T.thermosaccharolyticum was the dominating genus during the short trend related to the shortest lag phase time and highest hydrogen production rate. The long trends were associated with a decrease of Bacillus sp. concentration at the beginning of the experiments and with the possible competition for soluble substrates between T.thermosaccharolyticum and Clostridium sp. The third phase showed that the use of a second stage to produce methane was useful enhancing the treatment of both wastes. Finally, the overall energy produced for both biofuels (Hydrogen andmethane) showed similar levels with other process. However, hydrogen was around the 10% of the overall energy produced in the process. In addition, both gases could be mixed to produce biohythane which improves the properties of biogas.
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Nishikawa, Tomohiro. "Studies on Utilization of Anaerobically-Digested Manure from Methane Fermentation Plant in Paddy Rice Production." Kyoto University, 2013. http://hdl.handle.net/2433/175048.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(農学)
甲第17619号
農博第1981号
新制||農||1009(附属図書館)
学位論文||H25||N4740(農学部図書室)
30385
京都大学大学院農学研究科農学専攻
(主査)教授 稲村 達也, 教授 白岩 立彦, 教授 廣岡 博之
学位規則第4条第1項該当
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Moss, Angela R. "The effect of diet composition on methane production by sheep." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243640.

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Webb, J. "Nitrous oxide and methane emissions from agriculture and approaches to mitigate greenhouse gas emissions from livestock production." Thesis, University of Wolverhampton, 2017. http://hdl.handle.net/2436/621013.

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This thesis links papers reporting field measurements, modelling studies and reviews of greenhouse gas (GHG) emissions and their abatement from agriculture, in particular from livestock production. The aims of the work were to: quantify GHG emissions from litter-based farmyard manures; evaluate means by which GHG emissions from agricultural production may be abated; assess synergies and conflicts between the abatement of other N pollutants on emissions of nitrous oxide (N2O); analyse two records of soil temperature from 1976-2010 from Wolverhampton (UK) and Vienna (Austria). Agricultural emissions of GHGs are not readily abated by ‘end of pipe’ technologies. Large decreases in agricultural GHG emissions may require changes in the production and consumption of food that could have unwelcome impacts on both consumers and producers. However, identifying and prioritizing both modes and locations of production, together with utilizing inputs, such as N fertilizer and livestock feeds, more efficiently can reduce GHG emissions while maintaining outputs. For example, GHG emissions from livestock production may be lessened by increasing the longevity of dairy cows, thereby decreasing the proportion of unproductive replacement animals in the dairy herd. Sourcing a larger proportion of calves from the dairy herd would decrease emissions of GHGs from beef production. The distance between the region of food production to that of consumption has relatively little impact on total GHG emissions per tonne of food product. Due to greater productivity or lesser energy inputs, importing some foods produced in other parts of the world may decrease GHG emissions per tonne compared with UK production, despite the additional emissions arising from long-distance transport. Manure application techniques to abate ammonia (NH3) emissions do not axiomatically increase emissions of N2O and may decrease them. Soil temperature measurements from 1976 to 2010 were consistent with the warming trends reported over the last 40 years.
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Lansing, Stephanie A. "Performance and Optimization of Low-cost Digesters for Energy Production and Treatment of Livestock Wastewater." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1223474543.

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Ojong, Pascal. "Investigation of the effects of co-digesting of biodegradable waste and swine manure on the biogas process." Thesis, Linköpings universitet, Tema vatten i natur och samhälle, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-73444.

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Biomass and biomass-derived waste are important renewable energy sources which plays a vital role in greenhouse gas reduction from fossil fuel.  Biomass can be degraded in a process known as anaerobic digestion (AD) to produce biogas. Biogas is a mixture of methane and carbon dioxide which is utilized as a renewable source of energy. This project was based on the investigation of AD process in Nordvästra Skånes Renhållnings AB (NSR) a biogas facility in Helsingborg Sweden. A lab simulation of NSR digesters was conducted to evaluate the effects of swine manure on AD using two continuously stirred tank reactors (CSTR) R1 (control) and R2 with a working volume of 4L for 21 weeks. The study was divided into 4 periods and the investigation was carried out by increasing the organic loading rate (OLR) step wise from 2.5 to 3.6 gVSL-1day-1. To assess the effects of swine manure, the performance and stability of the reactors were monitored by collecting data from process parameters. These process parameters included biogas production, pH, volatile fatty acids, methane yield, methane content and organic solids (total and volatile solids). Increase in OLR resulted in increase biogas production in both reactors, however R2 with additional swine manure (15%) produced more biogas than R1. Methane yield was fairly stable during the experiment and had a similar trend in both reactors, but however R2 had a slightly higher average yield (730±60 mLCH4 gVS-1) than R1 (690±60 mLCH4 gVS-1) during the entire experiment. Increase OLR resulted in increase VFA in period 2; R2 with additional swine manure had a lower peak VFA concentration of 25 mM as compared to 33mM in R1.  The characteristics of NSR substrate mix and swine manure provided a good buffering system (stable pH), and reactors were still running stably at 3.6 gVSL-1day-1. Furthermore swine manure was investigated to contain macro-nutrients and trace metals which might have enhanced the AD process in R2 containing more Co, Zn, Ni and Mo than R1. Since this investigation was a simulation, the waste mix used at NSR contained 7% swine manure, this made it difficult to give clearer conclusions about the effects of co-digestion of swine manure on the biogas process since the control (R1) had 7% swine manure. Keywords: Anaerobic digestion, co-digestion, swine manure, substrate mix, organic loading rate, biogas production, methane yield, VFA, process parameters, CSTR.
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Greenwade, Ronald Keelan. "Sizing an Anaerobic Digester in a Rural Developing World Community: Does Household Fuel Demand Match Greenhouse Gas Production?" Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6090.

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Anaerobic digestion is the process by which organic carbon is converted into biogas in the form of carbon dioxide (CO2) and methane (CH4). Both of these products are greenhouse gases that contribute to global warming. Therefore if anaerobic reactors are improperly maintained and biogas is leaked or intentionally released into the atmosphere because biogas production exceeds household demand, these reactors may become generators of greenhouse gas emissions instead of sustainable energy producers. The objective of this research was to develop a framework to assess if the demand for biogas by a rural adopter of an anaerobic digester matched with the associated local gas production. A literature review of the energy required to prepare commonly consumed food of rice and beans was conducted to establish required household biogas volumes. This review determined that 0.06 m3 of methane was required to prepare a half a kg of rice (on a dry weight basis) and 0.06 m3 of methane was required to prepare a half a kg of beans (on a dry weight basis). Furthermore an analysis of occupants of a rural Panamanian town was performed along with a design model for rural anaerobic reactor gas production to determine if an overproduction of biogas would occur if anaerobic reactors were built for families who owned swine. It was determined using this approach that all of the fifteen household would experience an overproduction of biogas based on household demand of methane and therefore would risk the release of greenhouse gases. Household size ranged from one to seven occupants and swine ownership ranged from one to fifteen per household. The differences of biogas supply with respect to demand from these fifteen situations ranged from 0.09 to 0.35 m3 of a biogas with 40% methane and 0.27 to 6.17 m3 of excess biogas with a methane content of 70% per household per day. An average of 0.45 m3 of a biogas with 40% methane per household per day was calculated and 0.87m3 for 70% methane for all fifteen households, excluding one outlier. However, because this research uses a model based on plug flow reactor mechanics, results may produce varied results from other studies concerning small scale anaerobic digestion.
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Books on the topic "Farm manure in methane production"

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United States. Environmental Protection Agency. Office of Air and Radiation., ed. Global methane emissions from livestock and poultry manure. [Washington, D.C.]: U.S. Environmental Protection Agency, Air and Radiation, 1992.

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Garrison, M. V. Final report for the Iowa livestock industry waste characterization and methane recovery information dissemination project. Des Moines, IA: Iowa Dept. of Natural Resources, Energy & Geological Resources Division, 2003.

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Macias, Connor D. Manure use for fertilizer and energy. Hauppauge, N.Y: Nova Science Publishers, 2010.

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D, Macias Connor, ed. Manure use for fertilizer and energy. Hauppauge, N.Y: Nova Science Publishers, 2010.

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Hayworth, James M. Methane digesters and biogas recovery. New York: Nova Science Publishers, 2011.

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United States. National Aeronautics and Space Administration., ed. Modelling global methane emissions from livestock: Biological and nutritional controls. [Washington, DC: National Aeronautics and Space Administration, 1992.

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Program, Regional Biomass Energy, ed. Anaerobic digestion of livestock manures: A current opportunities casebook. Washington, D.C: Regional Biomass Energy Program, U.S. Dept. of Energy, 1995.

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Nōjo, Nara. Metan hakkō gasu-ka hatsuden jigyō no jigyō saisansei hyōka: Heisei 24-nendo chiiki shudō ni yoru saisei kanō enerugī donyū no tame no kinkyū shien jigyō itaku gyōmu (Gunma-ken Maebashi-shi) seika hōkokusho. [Gunma-ken Maebashi-shi]: Yūgen Kaisha Nara Nōjō, 2013.

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California Energy Commission. Public Interest Energy Research. Dairy power production program : dairy methane digester system program evaluation report: PIER consultant report. [Sacramento, Calif.]: California Energy Commission, 2009.

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E, Sneeringer Stacy, and United States. Department of Agriculture. Economic Research Service, eds. Carbon prices and the adoption of methane digesters on dairy and hog farms. Washington, D.C.]: U.S. Dept. of Agriculture, Economic Research Service, 2011.

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Book chapters on the topic "Farm manure in methane production"

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Zaman, M., K. Kleineidam, L. Bakken, J. Berendt, C. Bracken, K. Butterbach-Bahl, Z. Cai, et al. "Greenhouse Gases from Agriculture." In Measuring Emission of Agricultural Greenhouse Gases and Developing Mitigation Options using Nuclear and Related Techniques, 1–10. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-55396-8_1.

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AbstractThe rapidly changing global climate due to increased emission of anthropogenic greenhouse gases (GHGs) is leading to an increased occurrence of extreme weather events such as droughts, floods, and heatwaves. The three major GHGs are carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). The major natural sources of CO2 include ocean–atmosphere exchange, respiration of animals, soils (microbial respiration) and plants, and volcanic eruption; while the anthropogenic sources include burning of fossil fuel (coal, natural gas, and oil), deforestation, and the cultivation of land that increases the decomposition of soil organic matter and crop and animal residues. Natural sources of CH4 emission include wetlands, termite activities, and oceans. Paddy fields used for rice production, livestock production systems (enteric emission from ruminants), landfills, and the production and use of fossil fuels are the main anthropogenic sources of CH4. Nitrous oxide, in addition to being a major GHG, is also an ozone-depleting gas. N2O is emitted by natural processes from oceans and terrestrial ecosystems. Anthropogenic N2O emissions occur mostly through agricultural and other land-use activities and are associated with the intensification of agricultural and other human activities such as increased use of synthetic fertiliser (119.4 million tonnes of N worldwide in 2019), inefficient use of irrigation water, deposition of animal excreta (urine and dung) from grazing animals, excessive and inefficient application of farm effluents and animal manure to croplands and pastures, and management practices that enhance soil organic N mineralisation and C decomposition. Agriculture could act as a source and a sink of GHGs. Besides direct sources, GHGs also come from various indirect sources, including upstream and downstream emissions in agricultural systems and ammonia (NH3) deposition from fertiliser and animal manure.
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Calvet, Salva, Fernando Estellés, Agustín del Prado, and Karin Groenestein. "Modelling Methane Emission from Manure." In Smart Animal Production, 137–45. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-19730-7_6.

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Ghosh, Sambhunath. "Methane Production from Farm Wastes." In Biogas Technology, Transfer and Diffusion, 372–80. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4313-1_45.

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Hurst, G., M. Peeters, and S. Tedesco. "Integration of Catalytic Biofuel Production and Anaerobic Digestion for Biogas Production." In Springer Proceedings in Energy, 125–31. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63916-7_16.

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AbstractThe drive towards a low carbon economy will lead to an increase in new lignocellulosic biorefinery activities. Integration of biorefinery waste products into established bioenergy technologies could lead to synergies for increased bioenergy production. In this study, we show that solid residue from the acid hydrolysis production of levulinic acid, has hydrochar properties and can be utilised as an Anaerobic Digestion (AD) supplement. The addition of 6 g/L solid residue to the AD of ammonia inhibited chicken manure improved methane yields by +14.1%. The co-digestion of biorefinery waste solids and manures could be a promising solution for improving biogas production from animal manures, sustainable waste management method and possible form of carbon sequestration.
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Ellis, J. L., J. Dijkstra, E. Kebreab, S. Archibeque, J. France, and A. Bannink. "Prediction of methane production in beef cattle within a mechanistic digestion model." In Modelling nutrient digestion and utilisation in farm animals, 181–88. Wageningen: Wageningen Academic Publishers, 2011. http://dx.doi.org/10.3920/978-90-8686-712-7_20.

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Reetsch, Anika, Didas Kimaro, Karl-Heinz Feger, and Kai Schwärzel. "Traditional and Adapted Composting Practices Applied in Smallholder Banana-Coffee-Based Farming Systems: Case Studies from Kagera and Morogoro Regions, Tanzania." In Organic Waste Composting through Nexus Thinking, 165–84. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36283-6_8.

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AbstractIn Tanzania, about 90% of the banana-coffee-based farming systems lie in the hands of smallholder farmer families. In these systems, smallholder farmers traditionally add farm waste to crop fields, making soils rich in organic matter (humus) and plant-available nutrients. Correspondingly, soils remained fertile during cultivation for over a century. Since the 1960s, the increasing demand for food and biofuels of a growing population has resulted in an overuse of these farming systems, which has occurred in tandem with deforestation, omitted fallows, declined farm size, and soil erosion. Hence, humus and nutrient contents in soils have decreased and soils gradually degraded. Inadequate use of farm waste has led to a further reduction in soil fertility, as less organic material is added to the soils for nutrient supply than is removed during harvesting. Acknowledging that the traditional use of farm waste successfully built up soil fertility over a century and has been reduced in only a few decades, we argue that traditional composting practices can play a key role in rebuilding soil fertility, if such practices are adapted to face the modern challenges. In this chapter, we discuss two cases in Tanzania: one on the traditional use of compost in the Kagera region (Great African Rift Valley) and another about adapted practices to produce compost manure in the Morogoro region (Uluguru Mountains). Both cases refer to rainfed, smallholder banana-coffee-based farming systems. To conclude, optimised composting practices enable the replenishment of soil nutrients, increase the capacity of soils to store plant-available nutrients and water and thus, enhance soil fertility and food production in degraded banana-coffee-based farming systems. We further conclude that future research is needed on a) nutrient cycling in farms implementing different composting practices and on b) socio-economic analyses of farm households that do not successfully restore soil fertility through composting.
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Ntinyari, Winnie, and Joseph P. Gweyi-Onyango. "Greenhouse Gases Emissions in Agricultural Systems and Climate Change Effects in Sub- Saharan Africa." In African Handbook of Climate Change Adaptation, 1081–105. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_43.

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AbstractClimate change has been viewed to result from anthropogenic human activities that have significantly altered the Nitrogen (N) cycle and carbon cycles, increasing the risks of global warming and pollution. A key cause of global warming is the increase in greenhouse gas emissions including methane, nitrous oxide, and carbon among others. The context of this chapter is based on a comprehensive desktop review on published scientific papers on climate change, greenhouse emissions, agricultural fertilizer use, modeling and projections of greenhouse gases emissions. Interestingly, sub-Saharan Africa (SSA) has the least emissions of the greenhouses gases accounting for only 7% of the total world’s emissions, implying that there is overall very little contribution yet it has the highest regional burden concerning climate change impacts. However, the values could be extremely higher than this due to lack of proper estimation and measurement tools in the region and therefore, caution needs to be taken early enough to avoid taking the trend currently experienced in developed nations. In SSA, agricultural production is the leading sector in emissions of N compound to the atmosphere followed by energy and transportation. The greatest challenge lies in the management of the two systems to ensure sufficiency in food production using more bioenergy hence less pollution. Integrating livestock and cropping systems is one strategy that can reduce methane emissions. Additionally, developing fertilizer use policy to improve management of fertilizer and organic manure have been potentially considered as effective in reducing the effects of agriculture activities on climate change and hence the main focus of the current chapter.
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Dhang, Partho, Philip Koehler, Roberto Pereira, and Daniel D. Dye II. "Flies." In Key questions in urban pest management: a study and revision guide, 39–46. Wallingford: CABI, 2022. http://dx.doi.org/10.1079/9781800620179.0005.

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Abstract This book chapter discusses flies. Filth-breeding flies are usually broken down by the pest management industry into large flies and small flies. The most common fly is the house fly, and its larvae develop in farm animal manure and decaying plant material. It is important to understand the conditions where filth-breeding fly larvae develop in order to control them in urban settings. Some of the large flies of importance are the house fly, blow fly and flesh fly. Small flies are sometimes called gnats and develop in places like drains, residues of organic matter and food waste. Other fly larvae, like blow flies and flesh flies, develop in decaying meat, dead animals, and high protein decaying waste. Apart from houseflies, the most important flies to the urban pest management industry are the filth-breeding flies. With livestock and poultry production being concentrated into small areas near urban centers, house flies can develop in manure piles and migrate into residences and commercial establishments. The filth-breeding flies are considered very important disease transmitting flies throughout most parts of the world. The food source for filth-breeding fly larvae is usually decaying plant and animal matter. They pick up disease organisms on their bodies or orally, and then move them to human food by contact with their contaminated bodies or by regurgitation of pathogens. The ability of adult flies to move rapidly from decaying plant and animal materials make them important mechanical disease vectors. The important pathogens mechanically transmitted by flies are food poisoning bacteria (Shigella, Salmonella, E. coli) and cholera.
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Thierfelder, Christian, and Peter Steward. "Increasing adaptation to climate stress by applying conservation agriculture in Southern Africa." In Conservation agriculture in Africa: climate smart agricultural development, 270–83. Wallingford: CABI, 2022. http://dx.doi.org/10.1079/9781789245745.0016.

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Abstract Climate change and soil fertility decline are threatening food security in southern Africa and efforts have been made to adapt current cropping systems to the needs of smallholder farmers. Conservation Agriculture (CA) based on minimum soil disturbance, crop residue retention and crop diversification has been proposed as a strategy to address the challenges smallholder farmers face. Here we analyse the potential contributions of CA towards adaptation to the effects of climate change by summarizing data on infiltration, soil moisture dynamics and crop productivity under heat and drought stress. The data were taken in the main from CIMMYT's on-farm and on-station trial network. Data show that CA systems maintain 0.7-7.9 times higher water infiltration than the conventional tilled system depending on soil type, which increases soil moisture during the cropping season by 11%-31% between CA treatments and the conventional control treatment. This leads to greater adaptive capacity of CA systems during in-season dry spells and under heat stress. A supporting regional maize productivity assessment, analysing the results of numerous on-farm and on-station experiments, showed that CA systems will outperform conventional tillage practices (CP), especially on light-textured soils, under heat and drought stress. With higher rainfall and low heat stress, this relation was more positive towards CP and on clay soil there was no benefit of practising CA when rainfall was high. The long dry season and limited biomass production of CA systems in southern Africa require complementary good agricultural practices to increase other soil quality parameters (e.g. increased soil carbon) to maintain higher productivity and sustainability over time. This can be addressed by combinations of improved stress-tolerant seed, targeted fertilization, inclusion of tree-based components or green manure cover crops in the farming system, scale-appropriate mechanization and improved weed control strategies.
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Hettiarachchi, Hiroshan, Johan Bouma, Serena Caucci, and Lulu Zhang. "Organic Waste Composting Through Nexus Thinking: Linking Soil and Waste as a Substantial Contribution to Sustainable Development." In Organic Waste Composting through Nexus Thinking, 1–15. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36283-6_1.

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AbstractThis introductory chapter explains why organic waste composting is considered as one of the best examples to demonstrate the benefits of nexus thinking. Current literature is rich with information covering various aspects of composting process. However, it mainly represents two distinct fields: waste from the management point of view and soil/agriculture from the nutrient recycling point of view. It is hard to find information on how these two fields can benefit from each other, except for a few examples found within large agricultural fields/businesses. A policy/institutional framework that supports a broader integration of management of such resources is lacking: a structure that goes beyond the typical municipal or ministerial boundaries. There is a clear need to address this gap, and nexus thinking can help immensely close the gap by facilitating the mindset needed for policy integration. Good intention of being sustainable is not enough if there is no comprehensive plan to find a stable market for the compost as a product. Therefore, the chapter also discusses the strong need to have a good business case for composting projects. Composting can also support achieving the Sustainable Development Goals (SDGs) proposed by the United Nations. While directly supporting SDG 2 (Zero hunger), SDG 12 (Responsible consumption and production), and SDG 13 (Climate action), enhanced composting practices may also assist us reach several other targets specified in other SDGs. While encouraging waste composting as a sustainable method of waste and soil management, we should also be cautious about the possible adverse effects compost can have on the environment and public health, especially due to some non-traditional raw materials that we use nowadays such as wastewater sludge and farm manure. Towards the end, we urge for the improvement of the entire chain ranging from waste generation to waste collection/separation to compost formation and, finally, application to soil to ensure society receives the maximum benefit from composting.
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Conference papers on the topic "Farm manure in methane production"

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Dubrovskis, Vilis, and Dagnis Dubrovskis. "Biogas production from fresh and old sawdust litter with chicken manure." In 22nd International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, Faculty of Engineering, 2023. http://dx.doi.org/10.22616/erdev.2023.22.tf123.

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In Latvia, forest products are widely used for heat production by direct incineration. As it causes air pollution, especially in cities, other technologies are being considered. One of them is anaerobic digestion of biomass or biogas (methane) production. Biofuels and biogas are playing a key role in the decarbonisation of the transport sector and will contribute in the future to a fuel switch in combination with electrification, for example in hybrid cars. In sectors which are difficult to decarbonize, such as heavy-duty vehicles, ships and airplanes, biofuels often represent the only technically and economically viable solution. The European Biogas Association estimates that by 2030 overall annual potential for biogas will be at least 50 billion m3. In Latvia, there is a lot of timber processing and there is a lot of sawdust. They are also used as bedding in poultry farms. Bird droppings could improve their utility for biogas production. This article shows the results about anaerobic digestion of fresh and old sawdust and sawdust litter with chicken manure and slaughterhouse waste. Fresh and old sawdust and sawdust litter with chicken manure and slaughterhouse waste were digested in 6 l digesters at temperature 38 oC in batch mode process. Average specific biogas or methane yield from anaerobic fermentation of fresh sawdust was 0.407 L·g-1DOM or 0.175 L·g-1DOM respectively. Average specific biogas or methane yield from anaerobic fermentation of old sawdust was 0.369 L·g-1DOM or 0.153 L·g-1DOM respectively. Average specific biogas or methane yield from anaerobic fermentation of sawdust litter with chicken manure and slaughterhouse waste was 0.554 L·g-1DOM or 0.335 L·g-1DOM respectively.
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Mazurkiewicz, Jakub. "ECOLOGICAL AND ECONOMIC ASPECTS OF MANURE MANAGEMENT - CONCLUSIONS FROM THE MILKEY AND MELS PROJECTS." In 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022v/4.2/s19.29.

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The main purpose of the publication was to show the differences in revenues, costs and profits when using manure directly as a fertilizer (after storage) or as a substrate for a biogas plant equipped with a cogeneration unit, and then using the digestate for fertilization purposes. The comparison includes cost, revenue and profit streams throughout the year. It also takes into account the introduction of additional co-substrates in order to increase the yield of biogas (biomethane), and thus the profits from the future investment. Forecasts of the profitability of biogas investments were presented, taking into account the reduction of greenhouse gas emissions, i.e. methane and nitrous oxide, which are several dozen or even almost 300 times more harmful to the atmosphere than carbon dioxide. The economic, energy and ecological accounts of manure management can serve as guidelines for pre-investment analysis when considering investments in biogas plants. In addition, the published data indicate that the energy management of cow manure is of great importance when estimating the carbon footprint of the entire dairy production. It should be expected that in the near future such solutions will become more and more popular almost all over the world. Input parameters of substrates, gaseous emissions and biogas (and biomethane) yields were obtained from own research (cow manure samples were taken from a working farm) and from literature sources, e.g. these were international and national IPCC (Intergovermetal Panel on Climate Change) protocols.
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BRAN, Mariana, Simona Roxana PĂTĂRLĂGEANU, Mihai DINU, and Silviu Ionut BEIA. "SUPPORTING A HEALTHY ENVIRONMENT THROUGH LIVESTOCK." In Competitiveness of Agro-Food and Environmental Economy. Editura ASE, 2022. http://dx.doi.org/10.24818/cafee/2019/8/04.

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The importance of animal husbandry reaches all aspects (social, economic and environmental) of sustainable development in rural areas. People produce for sale, but also for consumption. At the same time, considering the location of this economic activity and the practice of farm technology, it is necessary to observe certain norms in order to ensure good environmental conditions. Of course, the future points to the mistakes of the past. Today, modern animal technology is coordinated through IT programs, which anticipate not only the production but also the risks. Specialized literature indicates the environmental risks arising from cattle breeding at planetary level: accumulation of methane as a specificity of digestion, but also through accumulated manure. In this sense, however, the bibliographic studies and the statistical analyses are in favour of maintaining the herds of cattle, on condition there is genetic improvement in the nutritional aspect, as well as judicious waste management. These considerations are appreciated by Romanian farmers in the economic activity of cattle breeding, promoting measures to reduce greenhouse gases in this field.
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Salogni, A., and D. Alberti. "Dynamic Analysis of a Planar SOFC Stack Fuelled by Biogas." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33255.

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This paper analyzes the dynamic behaviour of a 50 kW stack using planar co-flow solid oxide fuel cells with direct internal reforming fuelled by a biologically derived gaseous mixture of methane and carbon dioxide. The system modelled is composed by the SOFC stack, a catalytic burner, the heat recovery system and the control device aimed to keep the air temperature at the stack exit and the fuel utilization near to the set values. The model has been implemented using standard and user-defined components of an a-causal software based on the open-source Modelica modelling language. After a brief introduction to the production of the gaseous fuel derived from the anaerobic digestion of pig manure, data obtained from a case study on a pig farm situated in Lombardia (Italy) are presented, focusing on the yield of methane which can be exploited. The steady-state performance of the SOFC system fuelled by pure methane are compared with those obtained for the biogas working conditions, showing that the stack voltage is affected by greater concentration losses. Then, starting from a steady-state delivered current of 750 mA cm−2, the dynamic behaviour of the system when a load change of −150 mA cm−2 occurs is investigated for both pure methane and biogas fuelling hypothesis. The results of the simulations show that the transient phase is only marginally affected by the composition of the fuel, which causes a delay of about 50 s in the voltage transient. Finally, the effect obtained by imposing a linear variation in the fuel composition, which can be representative of a modification in the biological degradation of the organic substrate within the anaerobic digester, is discussed. After an initial transient, which is comparable with that obtained for a variation in the load current, the SOFC system is capable to restore the initial delivered power, provided that the required amount of fuel can be supplied to the anode.
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"Narasin as a Manure Additive to Reduce Methane Production from Swine Manure." In 2014 ASABE Annual International Meeting. American Society of Agricultural and Biological Engineers, 2014. http://dx.doi.org/10.13031/aim.20141896938.

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CZEKAŁA, Wojciech, Jacek DACH, Andrzej LEWICKI, Katarzyna GAJEWSKA, and Żaneta STASZAK. "UTILIZATION OF DIGESTATE OBTAINED FROM METHANE FERMENTATION OF CHICKEN MANURE." In IX International ScientificSymposium "Farm Machinery and Processes Management in Sustainable Agriculture". Departament of Machinery Exploittation and Management of Production Processes, University of Life Sciences in Lublin, 2017. http://dx.doi.org/10.24326/fmpmsa.2017.17.

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Gayle C Bishop, Robert T Burns, Timothy A Shepherd, Lara B Moody, Curt A Gooch, Robert Spajic, and Jennifer L Pronto. "Evaluation of Laboratory Biochemical Methane Potentials as a Predictor of Anaerobic Dairy Manure Digester Biogas and Methane Production." In 2009 Reno, Nevada, June 21 - June 24, 2009. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2009. http://dx.doi.org/10.13031/2013.27205.

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Santos Borges, Maria dos Reis, Beatriz Pereira da Costa, and Sandra Luz. "Life cycle assessment of biogas production from dairy cow manure on a Brazilian farm." In 19th Brazilian Congress of Thermal Sciences and Engineering. ABCM, 2022. http://dx.doi.org/10.26678/abcm.encit2022.cit22-0485.

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DUDEK, Magda, Marcin ZIELIŃSKI, Paulina RUSANOWSKA, Marcin DĘBOWSKI, Cezary, PURWIN,, Maja FIJAŁKOWSKA, and Anna NOWICKA. "EFFICIENCY OF ANAEROBIC DECOMPOSITION OF MANURE FROM CATTLE FED WITH SIDA HERMAPHRODITA SILAGE." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.202.

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The study aimed to determine the influence of addition of Sida hermaphrodita silage into cattle forage on efficiency of methane fermentation of cattle manure. Efficiency of methane fermentation connected with amount and composition of produced biogas was determined with respirometric tests. Methane fermentation was performed in mesophilic conditions with initial organic compounds loading of 5 g VS/(dm3∙d). The study was divided into two stages. In first stage, substrate in methane fermentation was only cattle manure. In second stage, substrate in methane fermentation was cattle manure and Sida silage. There were three series of experiments in each stage, due to cattle manure was obtained from cattle fed with forage differ in contribution of Sida silage (0 – series 1, 17% - series 2, 34% - series 3). In the stage 1, biogas production of 223±15 L/kg VS, 247±8.5 L/kg VS and 231±18 L/kg VS was noted in the series 1, 2, and 3, respectively. The addition of Sida silage to the cattle forage had no impact on biogas potential of cattle manure. In the stage 2, the same tendency was observed. No differences in biogas composition between series were also observed. Methane content in biogas was about 60%.
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Theresia, Martha, and Cindy Rianti Priadi. "Optimization of methane production by combining organic waste and cow manure as feedstock in anaerobic digestion." In RENEWABLE ENERGY TECHNOLOGY AND INNOVATION FOR SUSTAINABLE DEVELOPMENT: Proceedings of the International Tropical Renewable Energy Conference (i-TREC) 2016. Author(s), 2017. http://dx.doi.org/10.1063/1.4979246.

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