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首页> 外文会议>International Water Association(IWA) Conference; 20050518-20; Xi'an(CN) >Biological wastewater treatment by a bioreactor with repeatedly coupling of aerobes and anaerobes aiming at on-site reduction of excess sludge
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Biological wastewater treatment by a bioreactor with repeatedly coupling of aerobes and anaerobes aiming at on-site reduction of excess sludge

机译：通过生物反应器的生物废水处理，反复进行需氧菌和厌氧菌的耦合，旨在现场减少多余的污泥

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摘要

Activated sludge has been widely used in wastewater treatment in the world. But the biggest disadvantage of this method is the by-production of excess sludge in a large amount, causing the difficulties in operation and high cost of the wastewater treatment. Technological innovations for wastewater treatment capable of reducing the excess sludge have thus become the hot research topics in recent years. In our present research, we developed a new biological wastewater treatment process by repeatedly coupling of aerobes and anaerobes (rCAA) to reduce the excess sludge during the treatment of wastewater. During a 460-day continuous running, COD (300-700mg/L) and TOC(100-350mg/L) were effectively removed, of which the removal rate was above 80% and 90% respectively. SS in the effluent was 13 mg/L in average in the rCAA bioreactor without settling tank. The on-site reduction of the excess sludge in the rCAA might be contributed by several mechanisms. The degradation of the grown aerobes after moving into the anaerobic regions was considered to be one of the most important factors. Besides, the repeatedly coupling of aerobes and anaerobes could also result in a complex microbial community with more metazoan and decoupling of the microbial anabolism and catabolism.
机译：活性污泥已在世界范围内广泛用于废水处理。但是这种方法的最大缺点是大量产生过量的剩余污泥，导致操作困难和废水处理的高成本。因此，能够减少多余污泥的废水处理技术创新已成为近年来的热门研究课题。在我们目前的研究中，我们通过反复耦合需氧菌和厌氧菌（rCAA）来开发新的生物废水处理工艺，以减少废水处理过程中的多余污泥。在460天的连续运行中，有效去除了COD（300-700mg / L）和TOC（100-350mg / L），去除率分别高于80％和90％。在没有沉淀池的rCAA生物反应器中，废水中的SS平均为13 mg / L。现场减少rCAA中多余污泥的原因可能有多种。进入厌氧区后，生长的需氧菌的降解被认为是最重要的因素之一。此外，需氧菌和厌氧菌的反复耦合也可能导致一个复杂的微生物群落，具有更多的后生动物，并且使微生物的代谢和分解代谢脱钩。

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