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Статті в журналах з теми "Anaerobic-aerobic technology"
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Mijaylova-Nacheva, P., E. Ramírez-Camperos, and S. Cuevas-Velasco. "Treatment of organic synthesis wastewater using anaerobic packed bed and aerobic suspended growth bioreactors." Water Science and Technology 55, no. 7 (April 1, 2007): 235–43. http://dx.doi.org/10.2166/wst.2007.150.
Повний текст джерелаАнотація:
The performance of an anaerobic mesophilic packed bed reactor, with a mixture of GAC and tezontle, followed by an aerobic suspended growth system was studied for the treatment of organic chemical wastewater with a high COD concentration (22–29 g/L). The testing of the anaerobic–aerobic system was conducted in an experimental set-up for almost 2.5 years. Different operational conditions were evaluated. The anaerobic reactor showed performance stability and COD removals higher than 80% were obtained with loads up to 16.6 kg.m−3.d−1. The acclimation of the aerobic biomass to the substrate in the anaerobic effluent was very quick and COD removals higher than 94% were obtained even at high organic loads. The combined anaerobic–aerobic system allowed total COD removals higher than 99.5% and the accomplishment of the discharge requirements of 200 mgCOD/L when the anaerobic reactor was operated with loads of 8–11 kg.m−3.d−1 and the aerobic reactor with 0.33 kg.kg−1.d−1, being the total HRT of 4.4. The average TKN removal in the anaerobic–aerobic system was 97%, the average for the anaerobic reactor being 52% and that one for the aerobic system being 94%.
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Fahmy, M., E. Heinzle, and O. M. Kut. "Treatment of Bleaching Effluents in Aerobic/Anaerobic Fluidized Biofilm Systems." Water Science and Technology 24, no. 3-4 (August 1, 1991): 179–87. http://dx.doi.org/10.2166/wst.1991.0474.
Повний текст джерелаАнотація:
Biodegradation of chloroorganic compounds in real industrial bleaching effluents (chlorination and extraction), with adapted biofilm in fluidized sand bed reactors, was studied under aerobic and anaerobic conditions. The effluents were only diluted and supplied with mineral nutrients. Two reactor combinations were compared with a single stage aerobic digestor (AFB). In the anaerobic-aerobic reactors in series (AAS), the effluents were first treated anaerobically followed by an aerobic reactor in a single pass. In the anaerobic-aerobic recycle reactor (AAR), the reactor content was periodically moving back from aerobic to anaerobic fluidized beds. The reactors were running continuously for one year. The most significant differences observed were between aerobic and anaerobic single reactors. Generally anaerobiosis reduced performance in terms of global parameters (COD, NPOC, AOX). With a residence time of 18 h for each reactor, COD and AOX typically decreased by 15-32 % for each aerobic reactor system (AFB, AAS, AAR), whereas a decrease of typically 4-15 % was observed in the purely anaerobic system. From GC and GC/MS analysis it was evident that in the anaerobic reactors, 2,4,6-trichlorophenol was first converted to 2,4-dichlorophenol. In all three systems 2,4,6-trichlorophenol and dichlorophenols were almost completely removed.
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Haberl, R., K. Atanasoff, and R. Braun. "Anaerobic-Aerobic Treatment of Organic High-Strength Industrial Waste Water." Water Science and Technology 23, no. 10-12 (May 1, 1991): 1909–18. http://dx.doi.org/10.2166/wst.1991.0647.
Повний текст джерелаАнотація:
Within this research project a number of high strength organic waste waters was treated in anaerobic-aerobic working bench scale units and in small scale pilot plants. By this study problems with the anaerobic-aerobic technology should be solved, dimensioning parameters should be worked out, and the economy should be focused. For most of the sewages the anaerobic-aerobic treatment turned out to be possible although sometimes technical problems could be observed. Such problems occurred in the final aerobic stage in connection with wastes with a high content of N. They could be solved by a predenitrification stage. Fibreboard sewage was taken as an example for wastes containing persistent substances; different anaerobic processes were tested, it turned out that a twostage anaerobic treatment is necessary to stabilize the process. The economic calculations proved the anaerobic-aerobic treatment to be preferable if some conditions are considered.
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Jahren, Sigrun J., and Hallvard Ødegaard. "Treatment of Thermomechanical Pulping (TMP) Whitewater in Thermophilic (55°C) Anaerobic-Aerobic Moving Bed Biofilm Reactors." Water Science and Technology 40, no. 8 (October 1, 1999): 81–89. http://dx.doi.org/10.2166/wst.1999.0391.
Повний текст джерелаАнотація:
Thermomechanical pulping whitewater was treated in an anaerobic followed by an aerobic Kaldnes moving bed biofilm reactor at 55°C. The anaerobic reactor was mixed by gas circulation and the aerobic reactor was mixed by aeration. The anaerobic reactor was started with mesophilic inoculum, while the aerobic reactor was started without inoculation. The reactors were operated on molasses water for one and a half years before the experiment was started. Total biomass concentrations (suspended and attached) were 3.3 g VSS/L in the anaerobic reactor and 1.6 g VSS/L in the aerobic reactor when starting feeding the reactors with TMP whitewater. After 7 months of operation the biomass concentrations had reached 5.5 and 6.5 g VSS/L in the anaerobic and aerobic reactors, respectively. The CODsol removals in the anaerobic reactor were around 30 % at loading rates up to 7 kg CODsol/m3d, and over-all CODsol removals of about 60 % were achieved. The results show that the anaerobic-aerobic moving bed biofilm process could be feasible for the thermophilic treatment of thermomechanical pulping whitewater.
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Gerards, R., W. Gils, and L. Vriens. "Upgrading of existing aerobic plants with the LUCAS anaerobic system based on full-scale experiences." Water Science and Technology 52, no. 4 (August 1, 2005): 39–46. http://dx.doi.org/10.2166/wst.2005.0085.
Повний текст джерелаАнотація:
It has been demonstrated that the combination of anaerobic–aerobic treatment is the best technological and economical solution for the treatment of high loaded wastewater. Where in the past aerobic treatment systems were still very acceptable due to the very good treatment efficiency, simplicity and robustness of the technology, this has, in most cases, been changed due to very stringent sludge disposal legislation. The anaerobic pretreatment takes care of approximately 80–90% of the overall treatment efficiency at high loading rates and low sludge production and low energy costs. The aerobic posttreatment takes care of the absolute high removal efficiency and nitrogen and phosphorus removal. Because of the low organic loading rate of the aerobic posttreatment also in this stage the sludge production is low. The combination of anaerobic–aerobic treatment results in a compact system capable of reaching high treatment efficiency at low sludge production and lower energy consumption. Waterleau Global Water Technology has developed LUCAS® anaerobic–aerobic system that combines an Upflow Anaerobic Sludge Blanket (UASB) reactor with an aerobic, constant-level cyclic activated sludge system, which is very suitable for the treatment of high loaded wastewaters in general and brewery waste water in particular. It has been proven from several full scale upgrading projects that the UASB system is best suitable for implementation in the aerobic plants that have to be extended in capacity.
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Satoh, H., Y. Iwamoto, T. Mino, and T. Matsuo. "Activated sludge as a possible source of biodegradable plastic." Water Science and Technology 38, no. 2 (July 1, 1998): 103–9. http://dx.doi.org/10.2166/wst.1998.0115.
Повний текст джерелаАнотація:
Polyhydroxyalkanaote (PHA) is known to be temporarily stored by microorganisms in activated sludge especially in the anaerobic-aerobic processes. When PHA is extracted from activated sludge, it is a thermoplastic with the remarkable characteristics of biodegradability. We investigated the possibility of using activated sludge for the production of PHA, focusing on increasing the PHA content of activated sludge. Activated sludge from laboratory scale anaerobic-aerobic reactors accumulated PHA of around 20% under anaerobic conditions and up to 33% under aerobic conditions. In order to further increase the PHA content of activated sludge, we introduced the “microaerophilic-aerobic” process, where a limited amount of oxygen is supplied into the anaerobic zone of the anaerobic-aerobic process. Activated sludge acclimatized in the microaerophilic-aerobic process accumulated PHA of as much as 62% of sludge dry weight. The “microaerophilic-aerobic” process was demonstrated to be an effective process for the enrichment of PHA-accumulating microorganisms.
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Bi, Li Jun, Jing Yang, and Shi Quan Sun. "Study on Phosphorus Release from Sediment Control by In Situ Control Technology." Advanced Materials Research 374-377 (October 2011): 899–904. http://dx.doi.org/10.4028/www.scientific.net/amr.374-377.899.
Повний текст джерелаАнотація:
This paper test to processing lakes sediment by three kinds of in-situ control technology which including aeration, zeolite capping and calcium nitrate in situ treatments, and it study the influence of phosphorus release from sediment. The test results showed: (1) under anaerobic conditions, the phosphorus release content is as 4.26 times as it under aerobic conditions. Under aerobic condition (dissolved oxygen saturation ≥ 20%), the Dissolved oxygen is not important for phosphorus release in sediments.（2）zeolite capping can effectively control the phosphorus release from sediment, but Dissolved oxygen is important for that. Under dynamic condition, the phosphorus release content is stability.（3）Under aerobic conditions or anaerobic conditions, calcium nitrate in situ treatments can effectively control the phosphorus release from sediment. Under aerobic conditions, the phosphorus release content reduce by 53.6%.Under anaerobic conditions, it reduce by 83.4%.(4) The control effects of the phosphorus release content by three kinds of in-situ control technology was followed: under anaerobic condition, calcium nitrate in-situ treatment > zeolite capping> untreated; and under aerobic condition, calcium nitrate in-situ treatment > zeolite capping > aeration ≥ untreated; and under hydrodynamic condition, calcium nitrate in-situ treatment >zeolite coverage>zeolite capping> aeration >untreated.
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Rosadi, Maulana Yusup, Toshiro Yamada, Hudori Hudori, Hiroto Tamaoki, and Fusheng Li. "Characterization of dissolved organic matter extracted from water treatment sludge." Water Supply 20, no. 6 (June 9, 2020): 2194–205. http://dx.doi.org/10.2166/ws.2020.120.
Повний текст джерелаАнотація:
Abstract The characteristics of dissolved organic matter (DOM) that formed during the aerobic and anaerobic incubation of drinking water treatment sludge stored at different temperatures (5 °C, 20 °C, 40 °C) for long periods (7, 14, and 21 days) were investigated. Anaerobic incubation at high temperatures with prolonged storage was found to result in higher organic content than aerobic incubation (3.6–6.8 times at 40 °C). The high temperatures caused changes in the DOM fractions, with humic-like substances mainly formed in aerobic incubation and protein-like substances in anaerobic incubation. Results showed that the fluorescence intensity of humic-like and protein-like substances increased by 45% and 22%, respectively, at the end of the anaerobic incubation period. The UV-absorbing DOM constituents in aerobic incubation had lower molecular weights and were more heterogeneous than those in anaerobic incubation.
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Ferguson, John F. "Anaerobic and Aerobic Treatment for AOX Removal." Water Science and Technology 29, no. 5-6 (March 1, 1994): 149–62. http://dx.doi.org/10.2166/wst.1994.0710.
Повний текст джерелаАнотація:
A two-year study has focused on AOX removal from bleaching wastewaters in anaerobic and aerobic biological treatment, using bench scale bioreactors operated in parallel and in series. Significantly higher removals have been found in anaerobic than in aerobic treatment. Earlier work with dilute kraft bleaching wastes has been extended in additional laboratory tests and at a nearby kraft mill. 50-75% fractions of bleaching wastes were treated. Toxicity in the anaerobic process was encountered at 85% bleach waste fractions. Total AOX removal experienced in aerobic treatment is 30-35%, in anaerobic treatment 40-45%, and in an anaerobic/aerobic sequence 50-55%. Percentage removals were not sensitive to the fraction of bleaching wastewater. Several process modifications were attempted to try to obtain higher removals with only marginal success. Studies at a kraft mill confirmed the AOX removals that had been found in lab studies. AOX removal occurs by several mechanisms. There is a very significant chemical or abiotic degradation that occurs after neutralization, perhaps enhanced by reductants or other inorganic salts. Biological processes are much more significant in anaerobic than in aerobic treatment. Anaerobic reductive dehalogenation affects specific chlorinated compounds and catalyzed AOX degradation is facilitated by reduced coenzymes that are produced by bacteria. Removal by sorption or insolubilization is relatively minor in aerobic and anaerobic processes.
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Frigon, J. C., R. Cimpoia, and S. R. Guiot. "Sequential anaerobic/aerobic biotreatment of bark leachate." Water Science and Technology 48, no. 6 (September 1, 2003): 203–9. http://dx.doi.org/10.2166/wst.2003.0398.
Повний текст джерелаАнотація:
Bark leachate is generated from sawmill operations such as log storage sites and contains polymeric tannins, carbohydrates, organic acids, phenolic and resin compounds. The present study was aimed at assessing the performance of a sequential anaerobic and aerobic treatment, for both chemical oxygen demand (COD) and phenol removal, under various combinations of operational conditions, in the continuous mode. After anaerobic treatment in a five litres upflow anaerobic sludge bed (UASB) reactor, the leachate was directed into two parallel aerobic reactors, either an activated sludge unit or a fixed film submerged filter (packed with polyethylene Flexirings), both of a volume of one litre and oxygenated by air diffusion. For a leachate of 22 gCOD/l, an overall COD removal of 96Ð98% was achieved at an hydraulic residence time (HRT) of 4 days for the anaerobic reactor and one day for either aerobic systems. The phenol concentration generally increased after anaerobic treatment but was below the detection limit (50 ppb) after aerobic polishing. Radiorespirometric microcosms with 14C-labelled phenol confirmed that phenol was mineralized in the aerobic reactors. The performances of both aerobic systems were similar for COD and phenol removal. Thus, a sequential anaerobic/aerobic treatment was able to effectively address the contamination of a bark leachate discharge, including phenols.
Дисертації з теми "Anaerobic-aerobic technology"
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Kumar, Nitin. "Sequential Anaerobic-Aerobic Digestion: A new process technology for biosolids product quality improvement." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/41300.
Повний текст джерелаАнотація:
Anaerobic digestion is widely used for stabilization of solids in sewage sludges. Recent changes in the priorities and goals of digestion processes are focusing more attention on the efficiency of these processes. Increasing hauling cost and restrictions for land applications are two factors which are driving the increased attention to digestion efficiency. Noxious odor production from the land applied biosolids is another important issue related to digestion efficiency. Existing anaerobic digestion or aerobic digestion processes failed to provide simultaneous solution to biosolids related problems i.e. simultaneous VS reduction, better dewatering of biosolids and lesser odors from the biosolids.
Studies done by Novak et al. (2004) using different activated sludges show that anaerobic-aerobic digestion and aerobic-anaerobic digestion both increase volatile solids reduction compared to a single digestion environment. They proposed that there are 4 VS fractions in sludges: (1) a fraction degradable only under aerobic conditions, (2) a fraction degradable only under anaerobic conditions, (3) a fraction degradable under both anaerobic and aerobic conditions, and (4) a non degradable fraction. It has also been found (Akunna et al., 1993) that anaerobic-aerobic sequential treatment of wastewater can help in achieving substantial nitrogen removal. These results suggest that sequential anaerobic-aerobic digestion can address multiple biosolid related problems.
This study was designed to understand the effect of sequential anaerobic-aerobic digestion on the properties of resulting effluent biosolids. The study was carried out in two operation phases and during both phases one digester was maintained at thermophilic conditions and the other at mesophilic temperature conditions. In first operation phase (Phase-I) thermophilic digester was operating at 20 day SRT and mesophilic anaerobic digester was at 10 day SRT. The aerobic digesters following anaerobic digesters were operating at 6 day
II
SRT. In second operation phase (Phase-II), both thermophilic and mesophilic anaerobic digesters were operating at 15 day SRT and both had two aerobic digesters operating in parallel at 3 day and 6 day SRTs.
In addition, batch experiments were also conducted to measure the performance of aerobic-anaerobic digestion sequence. Another study was carried out to understand the nitrogen removal mechanism during aerobic digestion of anaerobic digested sludge. The feed sludge was spiked with four different concentrations of nitrate and nitrite.
It was observed during the study that aerobic digestion of anaerobic sludge helps in achieving higher Volatile solid reduction (~65% vs ~ 46% for mesophilic digestion and ~52% for thermophilic digestion). This result supports the hypothesis concerning the different fractions in volatile solids. Experimental results also show that the increase in VSR upon increasing anaerobic digestion SRT (more than 15 days) is less than the increase in the VSR due to the same increment of aerobic digestion SRT. Reduction in COD and VFA were also measured to be more than 50% during aerobic digestion.
Investigation of nitrogen fate during the sequential anaerobic-aerobic digestion show more than 50% total nitrogen removal. Higher nitrogen removal was in thermophilic anaerobic â aerobic digester combination than that in mesophilic anaerobicâ aerobic combination. The most probable reason for the removal was simultaneous nitrification and denitrification. Higher concentration of readily available VFA from thermophilic anaerobic digested sludge provide advantage in denitrification in following aerobic digester.
The resulting biosolids produced during sequential digestion process were also analyzed for dewatering properties and odor production. Proteins and polysaccharides concentrations were observed to decrease during aerobic digestion for thermophilic anaerobic - aerobic digestion combination, while in another combinations polysaccharide concentrations increases at aerobic phase with 3 day digestion. The concentration of polysaccharides decreases at higher digestion period of 6 and 9. The result of decrease in polysaccharide and protein was
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reflected by the reduction in the polymer dose consumption and decrease in the optimum CST for the biosolids resulting from the sequential anaerobic aerobic digestion.
Experimental results from odor experiments show that odor production potential of the biosolids decreases with increase in both anaerobic phase SRT and aerobic phase SRT. Thermophilic biosolids produces comparatively low odors but for longer periods, while mesophilic biosolids produces higher magnitude of odors during storage but only for comparative shorter period. Aerobic digestion of anaerobic sludge helps in reducing more than 50% odor production, but freeze-thaw cycle experiment shows that in both anaerobic and sequential anaerobic â aerobic digested sludges have higher potential for odor production. Higher aerobic digestion SRTs (6 days and above) shows more potential of reducing odors, but more experimental work is required to be done.Master of Science
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Abtahi, Zohreh. "Ethanol and glucose tolerance of M.indicus in aerobic and anaerobic conditions." Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19029.
Повний текст джерелаАнотація:
Over the last few decades, ethanol production from renewable resources has been of interest as an alternative fuel to the current fossil fuel, due to the unstable oil market and in order to decrease net emission of carbon dioxide which leads to global warming. According to analyses of DG Transport and Energy (TREN), it is not possible to reach the current biofuels directive promoting 5,75 % biofuel by the year 2010, due to the markets and technologies, but by the year 2020 achievement of 6.9% is expected. This new law will increase biofuel demand by 3,1 %.Lignocelluloses materials, which are relatively cheap and plentiful, are considered to be the main source of feedstock’s for low-cost bio-ethanol production. The general procedure to convert lignocelluloses material to bioethanol is hydrolysis of the hemicelluloses and the cellulose to its monomer sugars, fermentation and distillation.Bacteria, yeasts and filamentous fungi are able to ferment hydrolysates from different plants and convert it to bioethanol.Mucor indicus is a filamentous fungus; it is able to utilize a wide range of hexoses, phentoses and disaccharides (cellobiose) in order to produce ethanol. The Ethanol yield and productivity of this microorganism from hexoses are as same as Saccharomyces cerevisiae. But the reason that it is one of the candidates for ethanol production is the fungus ability to utilize xylose. The cell wall of M.indicus contains significant quantity of chitosan/chitin which can be easily extracted. Chitosan is the deacetylated products of chitin. They have many applications in chemistry, biotechnology, medicine, veterinary, dentistry, agriculture, food processing, environmental protection, water purification, cosmetic and textile industries.The results of the current work show that the glucose concentration in the medium had a great impact on the lag phase, glucose consumption and ethanol production in both aerobic and anaerobic conditions. The lag phase increased as the initial concentration of glucose increased. While the glucose concentration increased above 190 g/l in the medium the glucose consumption and ethanol production decreased in both aerobic and anaerobic conditions. The glucose tolerance of M.indicus in both aerobic and anaerobic condition is about 190 g/l and in the anaerobic condition the ethanol tolerance of this fungus is around 70 g/.Uppsatsnivå: D
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Чорномисюк, Ольго Вадимівна. "Біологічне очищення стічних вод виноробної промисловості". Master's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/30913.
Повний текст джерелаАнотація:
Пояснювальна записка: 102 с., 5
рис., 30 табл., 46посилань. В роботі обрано та обґрунтовано
анаеробно
-
аеробну
технологію
очистки
стічних вод виноробної промисловості.
Було обрано зброджування в
анаеробному
UASB-реакторі з наступною аеробною очисткою в аеротенку-витиснювачі.
Розраховано параметри та розроблено креслення головного
апарату-аеротенка. Розраховано матеріальний баланс процесу, наведено і
описано технологічну схему очистки стічних вод, розроблено схему
автоматизації біологічної стадії очистки, вказано точки і параметри контролю
етапів процесу, які необхідні для забезпечення якості кінцевої продукції,
охорони праці і довкілля.The explanatory note contains 102 p, 5 figures, 30 tables, 46 references. A naerobic-aerobic technology of sewage treatment of the wine industry has been selected and described in the work. Fermentation in the anaerobic UASB reactor has been selected, followed by aerobic purification in the aeration tank. The parameters were calculated and the drawing of the main apparatus - aerotank - was developed. The material balance of the process is calculated, the technological scheme of sewage treatment have been presented and described, the scheme of automation of the biological stage of purification is developed, the points and parameters of control of the process stages, which are necessary for ensuring the quality of the final product, occupational safety and environment were specified.
Частини книг з теми "Anaerobic-aerobic technology"
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Bajpai, Pratima. "Comparison of Aerobic Treatment with Anaerobic Treatment." In Anaerobic Technology in Pulp and Paper Industry, 29–35. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4130-3_4.
Повний текст джерела
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Delaide, Boris, Hendrik Monsees, Amit Gross, and Simon Goddek. "Aerobic and Anaerobic Treatments for Aquaponic Sludge Reduction and Mineralisation." In Aquaponics Food Production Systems, 247–66. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15943-6_10.
Повний текст джерелаАнотація:
AbstractRecirculating aquaculture systems, as part of aquaponic units, are effective in producing aquatic animals with a minimal water consumption through effective treatment stages. Nevertheless, the concentrated sludge produced after the solid filtration stage, comprising organic matter and valuable nutrients, is most often discarded. One of the latest developments in aquaponic technology aims to reduce this potential negative environmental impact and to increase the nutrient recycling by treating the sludge on-site. For this purpose, microbial aerobic and anaerobic treatments, dealt with either individually or in a combined approach, provide very promising opportunities to simultaneously reduce the organic waste as well as to recover valuable nutrients such as phosphorus. Anaerobic sludge treatments additionally offer the possibility of energy production since a by-product of this process is biogas, i.e. mainly methane. By applying these additional treatment steps in aquaponic units, the water and nutrient recycling efficiency is improved and the dependency on external fertiliser can be reduced, thereby enhancing the sustainability of the system in terms of resource utilisation. Overall, this can pave the way for the economic improvement of aquaponic systems because costs for waste disposal and fertiliser acquisition are decreased.
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"Simulation in the Laboratory Conditions of Aerobic-Anaerobic Bioremediation of Oil-Polluted Peat from Raised Bogs." In Chemical Technology, 223–38. Apple Academic Press, 2015. http://dx.doi.org/10.1201/b18178-22.
Повний текст джерела
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"A Case Study on Development of a New Aerobic-Anaerobic Bioremediation Technology." In Life Chemistry Research, 311–24. Apple Academic Press, 2015. http://dx.doi.org/10.1201/b18527-35.
Повний текст джерела
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"Conventional Wastewater Treatments." In Membrane Technology for Water and Wastewater Treatment in Rural Regions, 220–59. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2645-3.ch009.
Повний текст джерелаАнотація:
Conventional wastewater treatment consists of chemical, biological, physicochemical, and mechanical processes to remove organic loading, solids, and nutrient contents from wastewater. Biological processes are more commonly used in wastewater treatment as secondary or tertiary treatments, as it is more effective and more economical than chemical and mechanical processes. In this chapter, several types of wastewaters generated from municipal or industrial activities are discussed. Wastewater has different pollutant contents depending on the point of generation which consequently requires different ways of treatment. Some commonly used conventional wastewater treatment technologies are introduced. A particular focus is given to both aerobic and anaerobic treatments.
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You, S. J., W. T. Liu, M. Onuki, T. Mino, H. Satoh, T. Matsuo, and C. F. Ouyang. "Identification of predominant microbial populations in a non-phosphate removing anaerobic aerobic bioreactor fed with fermented products." In Advances in Water and Wastewater Treatment Technology, 207–15. Elsevier, 2001. http://dx.doi.org/10.1016/b978-044450563-7/50203-1.
Повний текст джерела
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Rana, Vivek. "Sustainable Treatment of Landfill Leachate Using Constructed Wetlands." In Recent Advancements in Bioremediation of Metal Contaminants, 237–55. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-4888-2.ch013.
Повний текст джерелаАнотація:
Sanitary landfilling is the major method of disposal of municipal solid waste (MSW) in developing countries. The disposal of MSW in landfills generates a large amount of highly toxic leachate, which has high potential hazards for the public, flora, fauna health and ecosystems. Advanced leachate treatment systems using biological and chemical treatment methods are recently implemented in developed countries, but high investment and operating costs restricted their application in most of the developing countries. To overcome this problem, an alternative sustainable treatment technology such as phytoremediation could be beneficial. The constructed wetland treatment system is an economical alternative for leachate treatment using local resources and is an energy-efficient technology. These green systems utilize anaerobic and aerobic reactions to break down, immobilize, or incorporate organic substances and other contaminants from polluted effluent. This chapter highlights the recent advances in the treatment of landfill leachates using constructed wetlands.
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Rana, Vivek. "Sustainable Treatment of Landfill Leachate Using Constructed Wetlands." In Research Anthology on Ecosystem Conservation and Preserving Biodiversity, 1006–25. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-5678-1.ch050.
Повний текст джерелаАнотація:
Sanitary landfilling is the major method of disposal of municipal solid waste (MSW) in developing countries. The disposal of MSW in landfills generates a large amount of highly toxic leachate, which has high potential hazards for the public, flora, fauna health and ecosystems. Advanced leachate treatment systems using biological and chemical treatment methods are recently implemented in developed countries, but high investment and operating costs restricted their application in most of the developing countries. To overcome this problem, an alternative sustainable treatment technology such as phytoremediation could be beneficial. The constructed wetland treatment system is an economical alternative for leachate treatment using local resources and is an energy-efficient technology. These green systems utilize anaerobic and aerobic reactions to break down, immobilize, or incorporate organic substances and other contaminants from polluted effluent. This chapter highlights the recent advances in the treatment of landfill leachates using constructed wetlands.
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Ibrahim, Mohamad Mokhtar, Zulkifly Jemaat, and Abdurahman Hamid Nour. "Review on Microbial Analysis Tools in POME treatment." In Handbook of Research on Resource Management for Pollution and Waste Treatment, 220–40. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-0369-0.ch010.
Повний текст джерелаАнотація:
Palm oil mill effluent (POME) is one of the major sources of water pollution in Malaysia. POME is produced in large volumes by many palm oil mills and has acidic pH and high concentrations of COD, BOD, and suspended solids, which have adverse effect to the environment. Currently, the technology to treat POME is either physical, chemical, or biological. About 80% of palm oil mills treat their POME by using biological method. Recent studies have indicated that understanding the microbial community structure is of great importance to improve and control the biological treatment performance. Currently, the most popular molecular biology tools for microorganism community analysis are fluorescence in situ hybridisation (FISH), cloning of 16S rDNA, and denaturing gradient gel electrophoresis (DGGE). This chapter aims to review the current and ongoing treatments of POME (mainly anaerobic, aerobic, physicochemical, and membrane separation) and discuss the potential of using the molecular biology techniques in POME treatment. The importance and effectiveness of the microbiology tools are also discussed. The ability to monitor microorganisms and understand their ecology is essential to effectively control the startup and operation of biological treatment system in treating POME and eventually producing effluent of acceptable quality.
Тези доповідей конференцій з теми "Anaerobic-aerobic technology"
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Qingling Zeng, Yongmei Li, and Guowei Gu. "Effect of Temperature on the Sorption of 17α-ethinylestradiol to Aerobic and Anaerobic Sludges." In 2009 International Conference on Energy and Environment Technology (ICEET 2009). IEEE, 2009. http://dx.doi.org/10.1109/iceet.2009.536.
Повний текст джерела
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Erguvan, Mustafa, and David W. MacPhee. "Analysis of a Multigeneration Energy System for Wastewater Treatment." In ASME 2021 Power Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/power2021-65516.
Повний текст джерелаАнотація:
Abstract The United Nations World Water Development Report claims that more than 6 billion people will suffer from clean water shortage by 2050. This is a result of climate change, demand increase for water, increase of water pollution, increasing population, and reduction of water resources [1]. In order to delay / prevent water scarcity, humans must take action using less water or perhaps recovering wastewater. Aerobic digestion is one of the best common methods to treat wastewater; however, this technology requires heavily on the use of electric motors and is estimated to consume 2–3% of US electricity. In this paper, a multigeneration energy system is developed to treat wastewater using a net-zero energy building model. This system consists of four major sub-systems: an aerobic digester, an anaerobic digester, a Brayton cycle, and a Rankine cycle. Using anaerobic digestion to produce bio-fuels, which can then be used on-site to power aeration systems, may offer significant advantages to reduce electricity usage. This study shows that the required energy for a sample aeration case study process can be supplied by a multigeneration system. Parametric analyses are performed to show how system efficiency may be increased as well as to investigate the required oxygen and power for an activated sludge process in a wastewater treatment plant. It is found here that the proposed CHP system can produce 6 times more energy than the required energy for the aeration in the activated sludge process.
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Binder, James J., and Stephen A. Torres. "Implementation of the Taunton, Massachusetts Regional Solid Waste Management Facility." In 17th Annual North American Waste-to-Energy Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/nawtec17-2310.
Повний текст джерелаАнотація:
Taunton, Massachusetts (City) is a city of 55,000 people located in Southeast Massachusetts, approximately 35 miles from Boston. Currently it hosts a regional landfill that will reach capacity in 2013. Beginning in 2005, the City began the process of searching for a solid waste management technology to replace the landfill. The focus for the search has been on conversion technologies capable of recovering materials and producing electricity or fuels, and maximizing diversion of waste from landfilling. Technologies being considered include both traditional and emerging technologies; e.g., composting, co-composting, thermal gasification, aerobic and anaerobic digestion, hydrolysis and mechanical means of waste separation into useful products. Landfilling and traditional waste-to-energy technology are not being considered.
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Wee, Eng Hoe, Jiun Yang Low, Kai Quin Chan, and Hui Yin Ler. "Effects of High Intensity Intermittent Badminton Multi-Shuttle Feeding Training on Aerobic and Anaerobic Capacity, Leg Strength Qualities and Agility." In 5th International Congress on Sport Sciences Research and Technology Support. SCITEPRESS - Science and Technology Publications, 2017. http://dx.doi.org/10.5220/0006501000390047.
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Agustin, Helena Carolina Kis, Putri Ika Wahyu Retno, and Rachmadi Norcahyo. "Effect of sulphate reducing bacteria (SRB) on corrosion of JIS G3101 low carbon steel with grade SS400 on crude oil under aerobic and anaerobic conditions." In ADVANCED INDUSTRIAL TECHNOLOGY IN ENGINEERING PHYSICS. Author(s), 2019. http://dx.doi.org/10.1063/1.5095352.
Повний текст джерелаЗвіти організацій з теми "Anaerobic-aerobic technology"
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Some complex approaches to training micro-cycles formation among cadetsweightlifters taking into account biotypes. Ilyas N. Ibragimov, Zinaida M. Kuznetsova, Ilsiyar Sh. Mutaeva, March 2021. http://dx.doi.org/10.14526/2070-4798-2021-16-1-39-46.
Повний текст джерелаАнотація:
Training cadets-weightlifters at all stages has a multipurpose orientation, that is why it is important to define and plan a rational combination of the training means use. Distribution of such micro structures in the cycle of training, as the days, months of training, provides effective volume, intensity and other values of physical load distribution. The structure of training cadets-weightlifters is based on taking into account the regularities and principles of sports training as the condition for physical readiness and working capacity increase. Any power oriented sports demands components characteristics in the structure of micro cycles. We consider the methodology of the training lessons organization by the example of the micro cycle of training taking into account bioenergetic profile of cadets-weightlifters. We revealed the necessity to distribute the macro cycle to structural components as the condition for the effectiveness of different variants of the training effects distribution. Materials and methods. We analyzed the range of training lessons among cadets-weightlifters in order to create the variants of gradual training problems solution according to the kinds of training. We analyzed training programs of cadets taking into consideration the level of readiness and their bioenergetic profiles. We created the content of the training work in the micro cycle of the preparatory period for cadets-weightlifters with different bioenergetic profiles. The main material of the research includes the ratio of the training effects volume in one micro cycle taking into account cadets’ bioenergetic profile. Cadets-weightlifters from Tyumen Higher Military-Engineering Command College (military Institute) took part in the research (Tyumen, Russia). Results. We created the content of the training work by the example of one micro cycle for cadets-weightlifters taking into account bioenergetic profile. The created variant of the training loads structure includes the main means of training taking into account the kind of training. Realization orientation in five regimens of work fulfillment with the effectiveness estimation of a total load within one lesson and a week in general is estimated according to a point system. Conclusion. The created variant of a micro cycle considers kinds of training realization taking into account the percentage of the ratio. Taking into account bioenergetic profiles helps to discuss strong and weak sides of muscle activity energy supply mechanisms. We consider the ability to fulfill a long-term aerobic load among the representatives of the 1st and the 2nd bioenergetic profiles. The representatives of the 3rd and the 4th biotype are inclined to fulfill the mixed load. The representatives of the 5th biotype are characterized by higher degree of anaerobic abilities demonstration. The technology of planning the means taking into account the regimens of work realization with point system helps to increase physical working capacity and rehabilitation processes in cadets’ organisms.