Log in

Relevant bibliographies by topics / Authothermal thermophilic aerobic digestion / Journal articles

Journal articles on the topic 'Authothermal thermophilic aerobic digestion'

To see the other types of publications on this topic, follow the link: Authothermal thermophilic aerobic digestion.

Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Authothermal thermophilic aerobic digestion.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Yi, Y. S., S. Kim, S. An, S. I. Choi, E. Choi, and Z. Yun. "Gas analysis reveals novel aerobic deammonification in thermophilic aerobic digestion." Water Science and Technology 47, no. 10 (May 1, 2003): 131–38. http://dx.doi.org/10.2166/wst.2003.0557.

Full text

Abstract:

A laboratory-scale thermophilic aerobic digester was operated with piggery wastewater. The operating temperature varied from 50-70°C. It has been found that excessive nitrogen removal occurred in the laboratory-scale thermophilic system at various HRTs. Nitrite and nitrate were not observed in the effluent. Gas measurement reveals the presence of significant amount of N2O along with NH3 gas. The rational production of N2O gas in accordance with temperature and HRT suggests that biologically mediated deammonification processes significantly contribute to the N removal. Although further microbiological investigation is required to clarify the exact nitrogen removal mechanism, the large production of N2O gas seems to be a result of the existence of a rapid growing heterotrophic deammonification process in the thermophilic system.

APA, Harvard, Vancouver, ISO, and other styles

2

Kim, Young-Kee, Myung-Shin Kwak, Sang-Baek Lee, Won Hong Lee, and Jeong-Woo Choi. "Effects of Pretreatments on Thermophilic Aerobic Digestion." Journal of Environmental Engineering 128, no. 8 (August 2002): 755–63. http://dx.doi.org/10.1061/(asce)0733-9372(2002)128:8(755).

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Hasegawa, S., N. Shiota, K. Katsura, and A. Akashi. "Solubilization of organic sludge by thermophilic aerobic bacteria as a pretreatment for anaerobic digestion." Water Science and Technology 41, no. 3 (February 1, 2000): 163–69. http://dx.doi.org/10.2166/wst.2000.0068.

Full text

Abstract:

Solubilization of organic sludge by thermophilic aerobic bacteria as a pretreatment for anaerobic digestion was investigated. The thermophilic bacteria which solubilized organic sludge were isolated from the thermophilic aerobic digestion reactor. The bacterium type SPT2-1 could grow at pH ranging from 5.0 to 8.5 with optimal temperature at 60–70°C. In batch experiments, 25–30% of volatile suspended solids (VSS) in the pre-heated sludge were solubilized on inoculating with the isolated bacteria although little was solubilized without inoculation. The isolated bacteria appeared to secret the extracellular enzymes including proteases and amylases. In continuous flow experiments, sludge solubilization rate (VSS removal) was around 40% under aerobic as well as microaerobic conditions. No accumulation of volatile fatty acids in the treated sludge was observed under aerobic conditions while significant amounts of them were accumulated under microaerobic conditions. Production of biogas on anaerobic digestion of the microaerobically-pretreated sludge was increased by 1.5 when compared with the sludge without pretreatment.

APA, Harvard, Vancouver, ISO, and other styles

4

Reimers, R. S., D. B. McDonell, M. D. Little, D. D. Bowman, A. J. Englande, and W. D. Henriques. "Effectiveness of Wastewater Sludge Treatment Processes to Inactivate Parasites." Water Science and Technology 18, no. 7-8 (July 1, 1986): 397–404. http://dx.doi.org/10.2166/wst.1986.0314.

Full text

Abstract:

In the United States, Ascaris spp., Trichuris trichiura, Trichuris vulpis and Toxocara spp. are the most commonly found viable parasites in both treated and untreated municipal sludges. As expected, heat treatment, thermophilic digestion (aerobic and anaerobic) and thermophilic composting were effective in parasite inactivation, and with good sludge digestion (both aerobic and anaerobic), the effectiveness of sludge lagoon storage and sludge drying beds to inactivate parasites and pathogens is greatly enhanced. At present two commercial sludge processes, Chemfixation and Ozonics treatment have shown potential to inactivate parasites.

APA, Harvard, Vancouver, ISO, and other styles

5

Boyle, Mike, Larry Sasser, Jeff Guild, and Dave Pollack. "VERTAD™, AUTO-THERMOPHILIC AEROBIC DIGESTION: PILOT TEST RESULTS." Proceedings of the Water Environment Federation 2001, no. 1 (January 1, 2001): 1307–22. http://dx.doi.org/10.2175/193864701784993821.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Fothergill, S., and D. S. Mavinic. "VFA Production in Thermophilic Aerobic Digestion of Municipal Sludges." Journal of Environmental Engineering 126, no. 5 (May 2000): 389–96. http://dx.doi.org/10.1061/(asce)0733-9372(2000)126:5(389).

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Hafner, Sasha D., Johan T. Madsen, Johanna M. Pedersen, and Charlotte Rennuit. "Inter-stage thermophilic aerobic digestion may increase organic matter removal from wastewater sludge without decreasing biogas production." Water Science and Technology 77, no. 3 (November 20, 2017): 721–26. http://dx.doi.org/10.2166/wst.2017.590.

Full text

Abstract:

Abstract Combining aerobic and anaerobic digestion in a two-stage system can improve the degradation of wastewater sludge over the use of either technology alone. But use of aerobic digestion as a pre-treatment before anaerobic digestion generally reduces methane production due to loss of substrate through oxidation. An inter-stage configuration may avoid this reduction in methane production. Here, we evaluated the use of thermophilic aerobic digestion (TAD) as an inter-stage treatment for wastewater sludge using laboratory-scale semi-continuous reactors. A single anaerobic digester was compared to an inter-stage system, where a thermophilic aerobic digester (55 °C) was used between two mesophilic anaerobic digesters (37 °C). Both systems had retention times of approximately 30 days, and the comparison was based on measurements made over 97 days. Results showed that the inter-stage system provided better sludge destruction (52% volatile solids (VS) removal vs. 40% for the single-stage system, 44% chemical oxygen demand (COD) removal vs. 34%) without a decrease in total biogas production (methane yield per g VS added was 0.22–0.24 L g−1 for both systems).

APA, Harvard, Vancouver, ISO, and other styles

8

Jin, Ningben. "The effect of phosphate buffer on improving the performance of autothermal thermophilic aerobic digestion for sewage sludge." RSC Advances 8, no. 17 (2018): 9175–80. http://dx.doi.org/10.1039/c8ra00793d.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Vallini, G., F. Cecchi, P. Pavan, A. Pera, J. Mata-Alvarez, and A. Bassettit. "Recovery and Disposal of the Organic Fraction of Municipal Solid Waste (MSW) by Means of Combined Anaerobic and Aerobic Bio-Treatments." Water Science and Technology 27, no. 2 (January 1, 1993): 121–32. http://dx.doi.org/10.2166/wst.1993.0089.

Full text

Abstract:

The paper deals with the semi-dry anaerobic digestion of municipal solid waste followed by composting as finishing treatment of the digested sludge. The integration of the anaerobic and aerobic treatments was studied as approach to close the water balance of the semi-dry anaerobic digestion process and to remove the phytotoxicity of the digested effluent. This study evaluated the response of the anaerobic effluent to the co-composting post-processing step, whether the anaerobic sludge came from mesophilic semi-dry digestion or thermophilic semi-dry nethanization. Evaluation of the strategy adopted was carried out in terms of performance of aerobic stabilization and its incidence on the economy of the overall treatment and the water balance of the process. Co-composting gave best results when integrated with thermophilic digestion.

APA, Harvard, Vancouver, ISO, and other styles

10

Damtie, Mekdimu Mezemir, Jingyeong Shin, Hyun Min Jang, and Young Mo Kim. "Synergistic Co-Digestion of Microalgae and Primary Sludge to Enhance Methane Yield from Temperature-Phased Anaerobic Digestion." Energies 13, no. 17 (September 2, 2020): 4547. http://dx.doi.org/10.3390/en13174547.

Full text

Abstract:

A two-stage temperature-phased mesophilic anaerobic digestion assay was carried out to study the interaction between various biological pretreatment conditions and the possible synergistic co-digestion of microalgae and primary sludge. The study of growth kinetics of the biochemical methane potential test revealed that a maximum of 36% increase in methane yield was observed from co-digestion of a substrate pretreated by thermophilic aerobic conditions (55 °C and HRT = 2 days) and an 8.3% increase was obtained from the anaerobic pretreated substrate (55 °C and HRT = 3 days). Moreover, no synergistic effects on methane yields were observed in co-digesting the substrate pretreated with high temperature (85 °C). The study also identified specific conditions in which interaction between biological pretreatment and co-digestion might substantially reduce methane yield. Careful optimization of operating conditions, both aerobic and anaerobic pretreatment at moderate thermophilic conditions, can be used as a biological pretreatment to enhance methane yield from the co-digestion of microalgae and primary sludge.

APA, Harvard, Vancouver, ISO, and other styles

11

Liu, Shugen, Xi Yang, and Xiaofei Yao. "Effects of pH on the biodegradation characteristics of thermophilic micro-aerobic digestion for sludge stabilization." RSC Advances 9, no. 15 (2019): 8379–88. http://dx.doi.org/10.1039/c9ra00547a.

Full text

Abstract:

For a thermophilic micro-aerobic digestion (TMAD) system, the pH is closely related to the production of short-chain fatty acids and the release of ammonia. A digester at pH 9.0 maintained better performance of sludge stabilization than acidic and neutral digestion systems.

APA, Harvard, Vancouver, ISO, and other styles

12

Mason, C. A., A. Häner, and G. Hamer. "Aerobic Thermophilic Waste Sludge Treatment." Water Science and Technology 25, no. 1 (January 1, 1992): 113–18. http://dx.doi.org/10.2166/wst.1992.0017.

Full text

Abstract:

The expansion in both industrial and municipal wastewater treatment in recent years has resulted in a major increase in the quantities of by-product sludge produced and has exacerbated problems of waste sludge treatment and/or disposal. The traditional method for waste sewage sludge treatment is anaerobic mesophilic digestion for sludges that are to be disposed of on agricultural land. Other disposal methods for untreated sludges include incineration, an option receiving increased interest, and ocean dumping, an option that is environmentally incompatable and used much less frequently today compared with 10 years ago. Sewage sludge can be considered to be a resource as far as its mineral nutrient composition is concerned. However, this resource cannot be exploited in agriculture because sludges are inevitably contaminated with noxious chemicals that partition into the sludge during either primary or secondary wastewater treatment. In the case sewage sludge, pathogenic and potentially pathogenic organisms are also present unless such contaminants are removed during treatment. Traditional mesophilic treatment under anaerobic conditions does not remove either noxious chemicals such as detergent residues or pathogenic organisms to a satisfactory degree. During the past decade, autothermal aerobic thermophilic pretreatment processes have been introduced as a complementary sludge treatment stage. Such aerobic pretreatment processes allow both the biodegradation of chemicals that are recalcitrant to anaerobic treatment and the thermal inactivation of pathogenic organisms. However, their introduction as a total treatment process for sludges is inhibited by their relatively poor conversion efficiencies as far as mineralization is concerned. In this contribution the biodegradation bacteria under aerobic thermophilic conditions will be described and discussed and concepts for biomass yield coefficient reduction that could enhance aerobic thermophilic sludge treatment process effectiveness will be introduced.

APA, Harvard, Vancouver, ISO, and other styles

13

Zábranská, J., M. Dohányos, P. Jeníček, H. Ružičková, and A. Vránová. "Efficiency of autothermal thermophilic aerobic digestion and thermophilic anaerobic digestion of municipal wastewater sludge in removing Salmonella spp. and indicator bacteria." Water Science and Technology 47, no. 3 (February 1, 2003): 151–56. http://dx.doi.org/10.2166/wst.2003.0187.

Full text

Abstract:

The study is focused on the comparison of autothermal thermophilic aerobic digestion, thermophilic and mesophilic anaerobic digestion, based on long term monitoring of all processes in full-scale wastewater treatment plants, with an emphasis on the efficiency in destroying pathogens. The hygienisation effect was evaluated as a removal of counts of indicator bacteria, thermotolerant coliforms and enterococci as CFU/g total sludge solids and a frequency of a positive Salmonella spp. detection. Both thermophilic technologies of municipal wastewater sludge stabilisation had the capability of producing sludge A biosolids suitable for agricultural land application when all operational parameters (mainly temperature, mixing and retention time) were stable and maintained at an appropriate level.

APA, Harvard, Vancouver, ISO, and other styles

14

Guild, Jeff, Mike Boyle, Larry Sasser, Dave Pollock, and Jenny Yoo. "VERTAD™ – AUTO-THERMOPHILIC AEROBIC DIGESTION: DEMONSTRATION-SCALE TEST RESULTS." Proceedings of the Water Environment Federation 2001, no. 14 (January 1, 2001): 482–511. http://dx.doi.org/10.2175/193864701802779378.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Ros, M., and G. D. Zupančič. "Two-Stage Thermophilic Anaerobic–Aerobic Digestion of Waste-Activated Sludge." Environmental Engineering Science 21, no. 5 (September 2004): 617–26. http://dx.doi.org/10.1089/ees.2004.21.617.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Mavinic, Donald S., Venkatram Mahendraker, Abyartha Sharma, and Harlan G. Kelly. "Effect of Microaerophilic Conditions on Autothermal Thermophilic Aerobic Digestion Process." Journal of Environmental Engineering 127, no. 4 (April 2001): 311–16. http://dx.doi.org/10.1061/(asce)0733-9372(2001)127:4(311).

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Chu, A. "Volatile fatty acid production in thermophilic aerobic digestion of sludge." Water Research 28, no. 7 (July 1994): 1513–22. http://dx.doi.org/10.1016/0043-1354(94)90217-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Dichtl, N. J. "Two Stage Sludge Stabilization." Water Science and Technology 19, no. 7 (July 1, 1987): 1247–50. http://dx.doi.org/10.2166/wst.1987.0024.

Full text

Abstract:

For the stabilization of sludges, theoretical considerations were used to determine a multiple stage ‘Method of Procedure', in order to estimate the advantages and disadvantages of such a procedure. For the procedure, combinations of mesophilic digestion with preceding aerobic-thermophilic or aerobic-mesophilic preliminary treatment as well as anaerobic-thermophilic preliminary treatment, were carried out at a technical pilot scale, in order to quantify the expected advantages compared to one-stage mesophilic digestion. It appeared that, depending on the aim of the process, a two-stage or combined method would give clear advantages either in respect of minimized residence time and desired disinfection, or in respect of all costs for the process.

APA, Harvard, Vancouver, ISO, and other styles

19

Li, Xiaowei, Zonghan Li, Xiaohu Dai, Bin Dong, and Yanfei Tang. "Micro-aerobic digestion of high-solid anaerobically digested sludge: further stabilization, microbial dynamics and phytotoxicity reduction." RSC Advances 6, no. 80 (2016): 76748–58. http://dx.doi.org/10.1039/c6ra11964f.

Full text

Abstract:

Micro-aerobic digestion was firstly applied for further stabilization and phytotoxicity reduction of high-solid anaerobically digested sludge (ADS) in room temperature, mesophilic and thermophilic conditions.

APA, Harvard, Vancouver, ISO, and other styles

20

Wichitsathian, Boonchai, Jareeya Yimratanabovorn, and Watcharapol Wonglertarak. "Enhancement of performance and biodegradability kinetics of aerobic-anaerobic sludge digestion." E3S Web of Conferences 167 (2020): 01010. http://dx.doi.org/10.1051/e3sconf/202016701010.

Full text

Abstract:

The excess sludge problem from a wastewater treatment plant is a great concerned due to the high cost of sludge management accounting for about 20% to 50% of the total operating cost. Therefore, sludge reduction is critical. Currently, aerobic and/or anaerobic sludge digestions are widely used in the industries for treating the excess sludge. The objective of this research was to study the effects of aeration rate and temperature on the excess sludge reduction by using the aerobic-anaerobic digestion system in the laboratory. The aeration rates of 1.0, 0.5, and 0.1 volume air per volume slurry per minute (vvm) at the room temperature and the thermophilic temperature (55 ± 2°C) were investigated. The results showed that the highest removal efficiency of aerobic sludge digestion was obtained at the thermophilic temperature and aeration rate of 1.0 vvm. The removal efficiency of organic matter in terms of COD, total solids (TS) and volatile solids (VS) were 34.76%, 33.01% and 43.45%, respectively. Consequently, the highest specific growth rate of microorganisms was 0.39 per hour and the substrate removal rate was 0.55 milligram CODremoved per milligram VSS per hour. Furthermore, slowly biodegradable organic matter was hydrolyzed to readily biodegradable organic matter and inert soluble organic matter. When the sludge effluent from aerobic sludge digestion was feed to the anaerobic sludge digestion, the removal efficiency of organic matter in terms of COD, TS and VS were increased by 25%, 17% and 28%, respectively. Moreover, the obtained methane production rate in the anaerobic sludge digestion was approximate 0.234 m3/kg COD removed.

APA, Harvard, Vancouver, ISO, and other styles

21

Naik, Bijaya Nanda, Harison Masih, and Ajaya Singh. "Bioengineering approach for sewage sludge degradation through aerobic thermophilic process." Journal of Bangladesh Academy of Sciences 37, no. 2 (January 5, 2014): 159–63. http://dx.doi.org/10.3329/jbas.v37i2.17556.

Full text

Abstract:

The aerobic thermophilic sewage sludge treatment process was studied at various bioreactor scales through modified bioengineering design approach. The effectiveness of the biological system was controlled by varying the process operating conditions of bioreactor to enhance microbial degradation efficiency. The inactivation of pathogen each promoted by increase of temperature, while the residual CFU was lowered by reducing the total solids content of sewage sludge. The optimum sludge degradation through aerobic thermophilic process occurred in temperature range of 58 - 62oC but temperature more than 60oC was suitable for hygienic inactivation. Dual digestion systems of an aerobic theromophilic treatment followed by anaerobic thermophilic stabilization stage shows greater treatment and efficiency in degrading the organic sludge constituting up to seventy per cent. DOI: http://dx.doi.org/10.3329/jbas.v37i2.17556 Journal of Bangladesh Academy of Sciences, Vol. 37, No. 2, 159-163, 2013

APA, Harvard, Vancouver, ISO, and other styles

22

Cheng, Jie Hong, Yan Yan Zhang, Nan Wen Zhu, and Shu Gen Liu. "The Study of Sludge Characteristics for One-Stage Autothermal Thermophilic Aerobic Digestion Process." Advanced Materials Research 236-238 (May 2011): 437–40. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.437.

Full text

Abstract:

One-stage Autothermal Thermophilic Aerobic Digestion was autonomously designed to treat municipal sludges. By the way of batch operation experiment, the influence of removal rates of volatile suspended solids(VSS), total suspended solids(TSS), auto-rise temperature, and COD concentration, volatile fatty acid concentration of sludge, were investigated respectively. The results showed that a large part of reactor temperature was in thermophilic statues at 56°C-60°C during sludge digestion period; Municipal sludges treated have achieved stabilization standard of 503 articles of EPA while removal rates of VSS and TSS at 38.9% and 31% respectively for 360h retention time. Resulting from micro-organisms hydrolysis reaction, total COD concentration of sludge supernatant (SCOD) was increased firstly and then dropped afterward during the process of digestion while total COD concentration of solid phase of sludge(TCOD) still fall down with removal rate of TCOD at 35.6% for 360h retention time. A sum of concentration of volatile fatty acid(VFA) was accumulated gradually in the sludge supernatant at 2745mg/L for 360h retention time because of micro-aerobic situation in the beginning of digestion process, and can be use as the carbon sources for wastewater treatment process.

APA, Harvard, Vancouver, ISO, and other styles

23

Ahn, Hee K., and Hong L. Choi. "Piggery Slurry Composting Using Batch Operating Autothermal Thermophilic Aerobic Digestion System." Asian-Australasian Journal of Animal Sciences 19, no. 2 (December 7, 2005): 273–79. http://dx.doi.org/10.5713/ajas.2006.273.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Staton, Kevin L., James E. Alleman, Richard L. Pressley, and Jim Eloff. "2nd Generation Autothermal Thermophilic Aerobic Digestion: Conceptual Issues and Process Advancements." Proceedings of the Water Environment Federation 2001, no. 1 (January 1, 2001): 1484–95. http://dx.doi.org/10.2175/193864701784993182.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Bartkowska, Izabela, Paweł Biedka, and Izabela Anna Talalaj. "Autothermal Thermophilic Aerobic Digestion of Municipal Sewage Sludge in Poland. Review." Proceedings 51, no. 1 (July 15, 2020): 12. http://dx.doi.org/10.3390/proceedings2020051012.

Full text

Abstract:

This paper presents the process of autothermal thermophilic aerobic digestion (ATAD). The installations used in municipal sewage treatment plants in Poland were reviewed. The adopted solutions for sludge management and parameters of operating installations were presented. Attention was also drawn to the energy consumption of the process. On the basis of research carried out in the years 2003–2019 in the plants in question, the characteristics of sludge after the ATAD process were presented. The parameters that determine the usefulness of the sludge as an organic fertilizer are indicated above all.

APA, Harvard, Vancouver, ISO, and other styles

26

Liu, Shugen, Nanwen Zhu, and Loretta Y. Li. "The one-stage autothermal thermophilic aerobic digestion for sewage sludge treatment." Chemical Engineering Journal 174, no. 2-3 (November 2011): 564–70. http://dx.doi.org/10.1016/j.cej.2011.09.043.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Burt, Peter, Simon F. Morgan, Brian N. Dancer, and John C. Fry. "Microbial populations and sludge characteristics in thermophilic aerobic sewage sludge digestion." Applied Microbiology and Biotechnology 33, no. 6 (September 1990): 725–30. http://dx.doi.org/10.1007/bf00604947.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Shanchayan, B., W. Parker, and C. Pride. "Dynamic analysis of a biofilter treating autothermal thermophilic aerobic digestion offgas." Journal of Environmental Engineering and Science 5, no. 3 (May 2006): 263–72. http://dx.doi.org/10.1139/s05-035.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Kim, Young-Kee, and Jeong-Woo Choi. "Fuzzy Controller for Thermophilic Aerobic Digestion Using Nicotinamide Adenine Dinucleotide Fluorescence." Journal of Environmental Engineering 130, no. 7 (July 2004): 759–65. http://dx.doi.org/10.1061/(asce)0733-9372(2004)130:7(759).

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Zupanèiè, Gregor D., Viktor Grilc, Milenko Roš, and Nataša Uranjek-Ževart. "Municipal waste sludge digestion in an autothermal aerobic sequencing batch reactor." Water Science and Technology 58, no. 6 (October 1, 2008): 1237–43. http://dx.doi.org/10.2166/wst.2008.351.

Full text

Abstract:

An autothermal aerobic sequencing batch process for sludge digestion and “class A” biosolids production was developed. The process was tested in laboratory and pilot scale size up to 150 PE, which can be considered a full scale size in some cases. In this process the maximum temperatures of 61.2°C and 60.2°C were achieved in laboratory scale in pilot scale equipment, respectively. The degradation efficiency of total chemical oxygen demand of sludge was between 50 and 70%. Similar results were achieved using pure oxygen in laboratory scale and oxygen/air mixture 1:1 by volume. The reactor scale greatly affects the achievement of thermophilic temperature. In smaller sizes the convective heat losses are the prevailing heat sink and the process is unable to produce enough heat to reach thermophilic temperature. Larger systems produce excess heat and can be installed with less intense aeration systems. The limit of air aeration system is at the size of about 500 PE.

APA, Harvard, Vancouver, ISO, and other styles

31

Lee, J. W., H. W. Lee, S. W. Kim, S. Y. Lee, Y. K. Park, J. H. Han, S. I. Choi, Y. S. Yi, and Z. Yun. "Nitrogen removal characteristics analyzed with gas and microbial community in thermophilic aerobic digestion for piggery waste treatment." Water Science and Technology 49, no. 5-6 (March 1, 2004): 349–57. http://dx.doi.org/10.2166/wst.2004.0774.

Full text

Abstract:

In order to characterize the nitrogen conversion characteristics in a thermophilic aerobic digestion (TAD) system, a laboratory study has been conducted with the analysis of effluent gas and microbial community in the sludge samples. The lab TAD system was operated with HRT of 3 days and 60°C. Based on the nitrogen mass balance, it has been found that about 2/3 of the daily load of nitrogen was converted to the gaseous form of nitrogen whereas cellular transformation and unmetabolized nitrogen accounted for about 1/3. Among the gaseous nitrogen transformation, significant amount of influent nitrogen had been converted to N2 gas (29% of influent N) and N2O (9% of influent N). Ammonia conversion was only 28% of influent N. The detection of N2O gas is a clear indication of the biological nitrogen reduction process in the thermophilic aerobic digester. No conclusive evidence for the existence of aerobic deammonification has been found. The microbial community analysis showed that thermophilic bacteria such as Bacillus thermocloacae, Bacillus sp. and Clostridial groups dominated in this TAD reactor. The diverse microbial community in TAD sludge may play an important role in removing both strong organics and nitrogen from piggery waste.

APA, Harvard, Vancouver, ISO, and other styles

32

Ugwuanyi, J. Obeta, Linda M. Harvey, and Brian McNeil. "Protease and xylanase activities and thermophilic populations as potential process monitoring tools during thermophilic aerobic digestion." Journal of Chemical Technology & Biotechnology 79, no. 1 (December 23, 2003): 30–38. http://dx.doi.org/10.1002/jctb.913.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Ibrahim, A., B. G. Yeoh, S. C. Cheah, A. N. Ma, S. Ahmad, T. Y. Chew, R. Raj, and M. J. A. Wahid. "Thermophilic Anaerobic Contact Digestion of Palm Oil Mill Effluent." Water Science and Technology 17, no. 2-3 (February 1, 1985): 155–66. http://dx.doi.org/10.2166/wst.1985.0127.

Full text

Abstract:

The palm oil industry is one of the major agro-based industries in Malaysia whose production accounts for more than 90% of the world export. The industry, however, also generates enormous quantities of liquid waste with high organic load causing serious pollution problems. In view of the high level of organics, anaerobic pretreatment is usually practised prior to aerobic breakdown. Most of the anaerobic digesters installed at the mills are currently operated under mesophilic conditions. However, the inherently high temperature of the effluent suggests that thermophilic digestion would bring about a much more effective system. This paper reports on results obtained from a pilot plant study on thermophilic anaerobic contact digestion of palm oil mill effluent which has been conducted and includes a microbiological study associated with the investigation.

APA, Harvard, Vancouver, ISO, and other styles

34

Zhao, Zehua, Yuanshun Xu, Tianfeng Wang, Xiaowei Xu, Houhu Zhang, and Jing Hua. "Effects of sludge properties in a combined process of mesophilic anaerobic digestion and thermophilic aerobic digestion." E3S Web of Conferences 194 (2020): 04015. http://dx.doi.org/10.1051/e3sconf/202019404015.

Full text

Abstract:

The combination of mesophilic anaerobic digestion and thermophilic aerobic digestion (MAN-TAD) has been recognized as a suitable technology to deal with conventional activated sludge. The MAN-TAD system can make sludge achieve better stability. The retention time of anaerobic digestion (AD-time) had an important role in the sludge stabilization process. With the extension of anaerobic digestion retention time, MAN-TAD system can make sludge achieve better stability. In comparison, volatile/total solids ratio (VS/TS) at AD-time of 38 d presented the lowest values among the three different AD-time with the value of 0.32. Long retention time of anaerobic digestion resulted in high amounts of soluble organic compounds (SCOD), and extracellular polymers (EPS) in the supernatant. Such high amount of organic compounds caused deterioration in sludge dewaterability. Compared with sludges of AD-time 17 d and 24 d, sludge of AD-time 38 d became extremely difficult to dewater due to its high capillary water absorption time (CST) at the end of digestion.

APA, Harvard, Vancouver, ISO, and other styles

35

Hepner, Seth, Brad Striebig, Raymond Regan, and Rich Giani. "Odor generation and control from the Autothermal Thermophilic Aerobic Digestion (ATAD) process." Proceedings of the Water Environment Federation 2002, no. 5 (January 1, 2002): 598–607. http://dx.doi.org/10.2175/193864702785140311.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Kim, Y. K., J. W. Choi, B. K. Oh, and W. H. Lee. "The Enhancement of Sludge Degradation Rates in Aerobic Thermophilic Sludge Digestion Process." Proceedings of the Water Environment Federation 2000, no. 11 (January 1, 2000): 792. http://dx.doi.org/10.2175/193864700784544965.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Aynur, Sebnem Koyunluoglu, Sonali Dohale, Muriel Dumit, Rumana Riffat, Mohammad Abu-Orf, Ralph Eschborn, and Sudhir Murthy. "Efficiency of Autothermal Thermophilic Aerobic Digestion Under Two Different Oxygen Flow Rates." Proceedings of the Water Environment Federation 2009, no. 3 (January 1, 2009): 397–408. http://dx.doi.org/10.2175/193864709793846394.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Burt, Peter, Michel H. Littlewood, Simon F. Morgan, Brian N. Dancer, and John C. Fry. "Venturi aeration and thermophilic aerobic sewage sludge digestion in small-scale reactors." Applied Microbiology and Biotechnology 33, no. 6 (September 1990): 721–24. http://dx.doi.org/10.1007/bf00604946.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Hobson, P. N. "Treatments of sewage sludge: Thermophilic aerobic digestion and processing requirements for landfilling." Biological Wastes 32, no. 3 (January 1990): 235–36. http://dx.doi.org/10.1016/0269-7483(90)90052-t.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Kim, Young-Kee, Myung-Shin Kwak, Won Hong Lee, and Jeong-Woo Choi. "Ultrasonic pretreatment for thermophilic aerobic digestion in industrial waste activated sludge treatment." Biotechnology and Bioprocess Engineering 5, no. 6 (December 2000): 469–74. http://dx.doi.org/10.1007/bf02931950.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Han, Il, Shankar Congeevaram, Dong-Won Ki, Byoung-Taek Oh, and Joonhong Park. "Bacterial community analysis of swine manure treated with autothermal thermophilic aerobic digestion." Applied Microbiology and Biotechnology 89, no. 3 (October 5, 2010): 835–42. http://dx.doi.org/10.1007/s00253-010-2893-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Jokela, Jari, Jukka Rintala, Aimo Oikari, Olli Reinikainen, Kari Mutka, and Timo Nyrönen. "Aerobic composting and anaerobic digestion of pulp and paper mill sludges." Water Science and Technology 36, no. 11 (December 1, 1997): 181–88. http://dx.doi.org/10.2166/wst.1997.0409.

Full text

Abstract:

The feasibility of aerobic vessel composting and anaerobic digestion for the treatment of pulp and paper mill sludges were studied. The composting studies made use of primary and secondary sludge from a de-inking and paper mill. In six parallely aerated 500 1 vessels with various carbon : nitrogen (C:N) -ratios, the most optimal performance was obtained with C:N -ratios of c. 22–35, while higher and lower ratios delayed the temperature increase. With the optimal ratios, the thermophilic stage was reached within 36 h, and the stage lasted for about seven days. In the scale-up study (18 m3 compost vessel), the thermophilic stage was reached within 24 h. An effective dehydratation of the mass was obtained as the total solids (TS) content of the compost increased from 31.3– to 63.8– within 21 days. The anaerobic digestion of pulp and paper mill sludges was studied using two mesophilic 5 1 digesters, their feed sludges consisting of a mixture of municipal sewage sludge and primary and secondary sludge from a pulp and paper mill. With this feed mixture and with a loading rate of about 1.0 kg volatile solids (VS)/m3d a removal of about 27 to 40– VS and methane production of about 180 1/kgVSadded feed sludge were achieved during the 80 d study period. The study showed that pulp and paper mill sludges are amenable to both aerobic composting and anaerobic digestion.

APA, Harvard, Vancouver, ISO, and other styles

43

Cheng, Jiehong, Feng Kong, Jun Zhu, and Xiao Wu. "Effects of stabilization and sludge properties in a combined process of anaerobic digestion and thermophilic aerobic digestion." Environmental Technology 36, no. 21 (June 4, 2015): 2786–95. http://dx.doi.org/10.1080/09593330.2015.1049212.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Braguglia, C. M., N. Carozza, M. C. Gagliano, A. Gallipoli, A. Gianico, S. Rossetti, J. Suschka, M. C. Tomei, and G. Mininni. "Advanced anaerobic processes to enhance waste activated sludge stabilization." Water Science and Technology 69, no. 8 (February 19, 2014): 1728–34. http://dx.doi.org/10.2166/wst.2014.067.

Full text

Abstract:

The requirement for enhanced stabilization processes to obtain a more stable, pathogen-free sludge for agricultural use is an increasing challenge to comply with in the waste hierarchy. With this in mind, the Routes European project (‘Novel processing routes for effective sewage sludge management’) is addressed to assess innovative solutions with the aim of maximizing sludge quality and biological stability. In order to increase anaerobic stabilization performances, the sequential anerobic/aerobic process and the thermophilic digestion process, with or without integration of the thermal hydrolysis pre-treatment, were investigated as regards the effect on sludge stabilization, dewaterability and digestion performances. Thermal pre-treatment improved anaerobic digestion in terms of volatile solids reduction and biogas production, but digestate dewaterability worsened. Fluorescence in situ hybridization (FISH) quantification showed an increase of methanogens consistent with the increase of biogas produced. The aerobic post-treatment after mesophilic digestion had a beneficial effect on dewaterability and stability of the digested sludge even if was with a reduction of the potential energy recovery.

APA, Harvard, Vancouver, ISO, and other styles

45

Kovács, R., P. Miháltz, and Zs Csikor. "Kinetics of autothermal thermophilic aerobic digestion – application and extension of Activated Sludge Model No 1 at thermophilic temperatures." Water Science and Technology 56, no. 9 (November 1, 2007): 137–45. http://dx.doi.org/10.2166/wst.2007.706.

Full text

Abstract:

The application of an ASM1-based mathematical model for the modeling of autothermal thermophilic aerobic digestion is demonstrated. Based on former experimental results the original ASM1 was extended by the activation of facultative thermophiles from the feed sludge and a new component, the thermophilic biomass was introduced. The resulting model was calibrated in the temperature range of 20–60 °C. The temperature dependence of the growth and decay rates in the model is given in terms of the slightly modified Arrhenius and Topiwala-Sinclair equations. The capabilities of the calibrated model in realistic ATAD scenarios are demonstrated with a focus on autothermal properties of ATAD systems at different conditions.

APA, Harvard, Vancouver, ISO, and other styles

46

Ugwuanyi, J. Obeta, Linda M. Harvey, and Brian McNeil. "Development of thermophilic populations, amylase and cellulase enzyme activities during thermophilic aerobic digestion of model agricultural waste slurry." Process Biochemistry 39, no. 11 (July 2004): 1661–69. http://dx.doi.org/10.1016/s0032-9592(03)00309-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

J. Kamble, Ashwini, M. G. Takwale, and V. S. Ghole. "An Approach to Enhance Biomethanation by Thermophilic Aerobic Digestion of Combined Vegetable Waste." IOSR Journal of Environmental Science, Toxicology and Food Technology 8, no. 1 (2014): 01–07. http://dx.doi.org/10.9790/2402-08120107.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Sim, So Young, Zhi Rou Wang, and Hyun Min Jang. "Solid and Soluble Organic Compounds Changes During Thermophilic Aerobic Digestion of Sewage Sludge." Journal of Korea Society of Waste Management 38, no. 06 (December 31, 2021): 529–34. http://dx.doi.org/10.9786/kswm.2021.38.6.529.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

KATSURA, Kenji, Masahiko MIURA, and Susumu HASEGAWA. "An Activated Sludge Process without Excess Sludge Production Applying Thermophilic Aerobic Sludge Digestion." Journal of Japan Society on Water Environment 21, no. 6 (1998): 360–66. http://dx.doi.org/10.2965/jswe.21.360.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Sridevi Dhanarani, T., C. Shankar, P. Prakash, T. K. Poornima Priyadharshani, and K. Thamaraiselvi. "Conversion of poultry litter into class A biosolids using autothermal thermophilic aerobic digestion." Management of Environmental Quality: An International Journal 27, no. 1 (January 11, 2016): 4–14. http://dx.doi.org/10.1108/meq-05-2015-0073.

Full text

Abstract:

Purpose – The purpose of this paper is to minimize environmental problems related to raw poultry manure application by stabilizing its nutrient and organic matter (OM) content. This can be achieved by prior digestion before its application to agricultural soils. Design/methodology/approach – In the present study, changes in physicochemical and microbial properties of poultry litter were studied in order to evaluate the suitability of using the digested (stabilized) product for soil amendment. The poultry litter was digested in autothermal thermophilic aerobic digestor (ATAD) where organic solids were degraded and the heat released during the microbial degradation was used to maintain the thermophilic temperatures ( < 50ºC) at a hydraulic retention time of about 3 d. Findings – Results of this study showed that the poultry litter undergoes physicochemical and microbial changes similar to other digestion systems; these changes include self-heating, relative increase in Cu, Zn, Fe, Mn, P, K and NO3-N and decrease in microbial population numbers, C, OM and NH4-N contents. Originality/value – ATAD is an effective method for the conversion of poultry litter into organic fertilizer, which can be readily applied to the agriculture land. ATAD is an eco-friendly, cost effective method which also reduces the length of stabilization.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!