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厌氧生物水处理技术研究进展 被引量:5
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作者 江瀚 王凯军 +1 位作者 倪文 陈树祥 《中国沼气》 2004年第4期18-21,31,共5页
在原有脱碳技术基础上,废水厌氧处理在其他领域的研究与应用被不断拓展。本文介绍了近年来厌氧生物处理技术的新发展,从理论和工艺两个方面,综述了厌氧生物脱硫、生物制氢、厌氧氨氧化、厌氧反硝化的原理、研究、技术开发与应用。
关键词 厌氧生物水 处理技术 沼气 生物制氢
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Advances in Energy-Producing Anaerobic Biotechnologies for Municipal Wastewater Treatment 被引量:5
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作者 Wen-Wei Li Han-Qing Yu 《Engineering》 SCIE EI 2016年第4期438-446,共9页
Municipal wastewater treatment has long been known as a high-cost and energy-intensive process that destroys most of the energy-containing molecules by spending energy and that leaves little energy and few nutrients a... Municipal wastewater treatment has long been known as a high-cost and energy-intensive process that destroys most of the energy-containing molecules by spending energy and that leaves little energy and few nutrients available for reuse, Over the past few years, some wastewater treatment plants have tried to revamp themselves as "resource factories," enabled by new technologies and the upgrading of old technologies. In particular, there is an renewed interest in anaerobic biotechnologies, which can convert organic matter into usable energy and preserve nutrients for potential reuse. However, considerable technological and economic limitations still exist. Here, we provide an overview of recent advances in several cutting-edge anaerobic biotechnologies for wastewater treatment, including enhanced side- stream anaerobic sludge digestion, anaerobic membrane bioreactors, and microbial electrochemical systems, and discuss future challenges and opportunities for their applications. This review is intended to provide useful information to guide the future design and optimization of municipal wastewater treatment processes. 展开更多
关键词 ANAEROBIC ENERGY Membrane bioreactor Microbial electrochemical system Municipal wastewater treatment
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Inhibitory effect of ammonia nitrogen on specific methanogenic activity of anaerobic granular sludge 被引量:6
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作者 周洪波 邱冠周 《Journal of Central South University of Technology》 EI 2006年第1期63-67,共5页
A series of batch experiments were conducted in 125 mL serum bottles to assess the toxicity of different concentrations of ammonia nitrogen to the specific methanogenic activity of anaerobic granular sludge from upflo... A series of batch experiments were conducted in 125 mL serum bottles to assess the toxicity of different concentrations of ammonia nitrogen to the specific methanogenic activity of anaerobic granular sludge from upflow anaerobic sludge bed(UASB) and expanded granular sludge bed(EGSB) reactors. The effects of pH value and temperature on toxicity of ammonia nitrogen to anaerobes were investigated. The results show that the specific methanogenic activity of anaerobic granular sludge suffers inhibition from ammonia nitrogen, the concentrations of ammonia nitrogen that produce 50 % inhibition of specific methanogenic activity for sludge from UASB and EGSB reactor are 2.35 and 2.75 g/L, respectively. Hydrogen utilizing methanogens suffers less inhibition from ammonia mtrogen than that of acetate utilizing methanogens. Hydrogen-producing acetogens that utilize propionate and butyrate as substrates suffer serious inhibition from ammonia nitrogen. The toxicity of ammonia nitrogen to anaerobic granular sludge enhances when pH value and temperature increase. Anaerobic granular sludge can bear higher concentrations of ammonia nitrogen after being acclimated by ammonia nitrogen for 7 d. 展开更多
关键词 ammonia nitrogen TOXICITY anaerobic granular sludge specific methanogenic activity
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Enhancing Biogas Production from Anaerobically Digested Wheat Straw Through Ammonia Pretreatment 被引量:4
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作者 杨懂艳 庞云芝 +4 位作者 袁海荣 陈树林 马晶伟 郁亮 李秀金 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2014年第5期576-582,共7页
Aqueous ammonia was used to pretreat wheat straw to improve biodegradability and provide nitrogen source for enhancing biogas production. Three doses of ammonia(2%, 4%, and 6%, dry matter) and three moisture contents(... Aqueous ammonia was used to pretreat wheat straw to improve biodegradability and provide nitrogen source for enhancing biogas production. Three doses of ammonia(2%, 4%, and 6%, dry matter) and three moisture contents(30%, 60%, and 80%, dry matter) were applied to pretreat wheat straw for 7 days. The pretreated wheat straws were anaerobically digested at three loading rates(50, 65, and 80 g·L-1) to produce biogas. The results indicated that the wheat straw pretreated with 80% moisture content and 4% ammonia achieved the highest methane yield of 199.7 ml·g-1(based on per unit volatile solids loaded), with shorter digestion time(T80) of 25 days at the loading rate of 65 g·L-1compared to untreated one. The main chemical compositions of wheat straw were also analyzed. The cellulose and hemicellulose contents were decomposed by 2%-20% and 26%-42%, respectively,while the lignin content was hardly removed, cold-water and hot-water extracts were increased by 4%-44%, and12%-52%, respectively, for the ammonia-pretreated wheat straws at different moisture contents. The appropriate C/N ratio and decomposition of original chemical compositions into relatively readily biodegradable substances will improve the biodegradability and biogas yield. 展开更多
关键词 wheat straw anaerobic digestion BIOGAS ammonia pretreatment moisture content
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Biogas by two-stage microbial anaerobic and semi-continuous digestion of Chinese cabbage waste 被引量:1
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作者 Xiaoying Dong Lijie Shao +3 位作者 Yan Wang Wei Kou Yanxin Cao Dalei Zhang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第5期847-852,共6页
Anaerobic digestion of Chinese cabbage waste was investigated through a pilot-scale two-stage digester at a mesophilic temperature of 37 ℃. In the acidification digester, the main product was acetic acid, with the ma... Anaerobic digestion of Chinese cabbage waste was investigated through a pilot-scale two-stage digester at a mesophilic temperature of 37 ℃. In the acidification digester, the main product was acetic acid, with the maxi- mum concentration of 4289 mg·L^-1 on the fourth day, accounting for 50.32% of total volatile fatty acids. The oxidation reduction potential (ORP) and NH^+-N level decreased gradually with hydraulic retention time (HRT) of acidification. In the second digestion phase, the maximum methanogenic bacterial concentration reached 9.6 × 10^10ml^-1 at the organic loading rate (OLR) of 3.5-4 kg VS·m^-3, with corresponding HRT of 12-16 days. Accordingly, the optimal biogas production was 0.62 m^3· (kg VS)^-1, with methane content of 65%-68%;. ORP and NH4^+-N levels in the methanizer remained between -500 and -560 mV and 2000-4500mg· L^-1, respec- tively. Methanococcus and Methanosarcina served as the main methanogens in the anaerobic digester. 展开更多
关键词 Anaerobic digestion Semi-continuous Two-stage Biogas Chinese cabbage waste Microbial ecology
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Effect of Microwave Athermal and Thermal Radiation in Wastewater Sludge Properties
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作者 N.M. Coelho K.J. Kennedy R.L. Droste 《Journal of Environmental Science and Engineering》 2011年第6期689-699,共11页
Samples of thickened waste activated sludge (TWAS) at two different concentrations were exposed to microwave radiation. Some of the samples were not allowed to heat up, to study the athermal effect of microwaves. Th... Samples of thickened waste activated sludge (TWAS) at two different concentrations were exposed to microwave radiation. Some of the samples were not allowed to heat up, to study the athermal effect of microwaves. The samples exposed to microwaves where their temperature was allowed to increase showed a higher degree of chemical oxygen demand (COD), protein and carbohydrate solubilization compared to a control. The size distribution of particles was changed after exposure of TWAS to microwaves. These results were also observed in the samples exposed to microwaves but kept at a constant temperature, suggesting the occurrence of a microwave athermal effect. Thermally (samples experiencing a temperature increase) and athermally (samples that were maintained at ambient temperature) microwaved subsequent anaerobic biodegradation. samples produced more methane than the non-microwaved controls in 展开更多
关键词 Athermal SOLUBILIZATION BIODEGRADABILITY MICROWAVE THERMOPHILIC WAS
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