Wastewater denitrification with one-carbon compounds as energy source
Wastewater denitrification with one-carbon compounds as energy source
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发表时间：
2016
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通讯作者：
G. Rhee;G. W. Fuhs
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作者：
G. Rhee;G. W. Fuhs
两种日益严重的水污染？富氮废物流入沿海沃茨，硝酸盐流入地下水？已经促进了从废水中微生物去除硝酸盐的工程设计的发展。直到最近，设计都是基于以甲醇为碳源的硝化二级流出物的反硝化。1 -7较新的工艺利用了Wuhrmann早先提出的策略，8使用废水中含有的或处理过程中形成的底物。本研究探讨了一个微生物学过程的潜在机制，以分离和识别负责的生物体，并区分真正的原因变量。有了这些信息，可以消除启动问题，优化工艺并使其可重现。所使用的工艺是流化床过滤5，在拿骚县的湾岸污水处理厂，长岛，成功地实践了添加甲醇。Y.尽管由于甲醇成本的增加以及不需要额外的碳源和能量的工艺的可用性，该工艺可能对于废水变得过时，但它仍将是从富含硝酸盐的地下水生产饮用水的有用模型。在这种应用中，需要用某种无毒物质代替甲醇。本文介绍了流化床脱氮工艺的微生物基础，并讨论了用甲烷代替甲醇的可能性。
Two increasingly prevalent forms of water pollution?influxes of nitrogen-rich wastes into coastal waters and of nitrates into groundwater ?have prompted the development of engineer ing designs for microbiological removal of ni trate from wastewaters. Until recently de signs have been based on the denitrification of nitrified secondary effluents with methanol as a carbon source.1-7 Newer processes exploit the strategy proposed earlier by Wuhrmann,8 using substrates contained in the wastewater or formed during treatment. This investigation probes the underlying mechanisms of one microbiological process in order to isolate and identify the responsible organisms and to distinguish the real-cause variables. With such information, startup problems can be eliminated and the process can be optimized and made reproducible. The process used is fluidized bed denitrifica tion 5 as successfully practiced with additions of methanol at the Bay Shore Wastewater Treatment Plant, Nassau County, Long Island, N. Y. Although this process may become out moded for wastewater because of the increas ing cost of methanol and the availability of processes that do not require an added source of carbon and energy, it will remain a useful model for the production of potable water from nitrate-rich groundwaters. In that application the replacement of methanol by some nontoxic substance would be called for. This paper describes the microbial basis for the fluidized bed denitrification process and discusses the possibility of replacing methanol by methane.