期刊
出版社
TAYLOR & FRANCIS INC
DOI: 10.1081/ESE-120027736
关键词
wastewater treatment; phosphorus and nitrogen removal; denitrifying phosphorus removal bacteria (DPB); A(2)N two-sludge system; COD/TN ratio
The Anaerobic-Anoxic/Nitrification (A(2)N) system is a continuous-flow, two-sludge process in which Poly-p bacteria are capable of taking up phosphate under anoxic conditions using nitrate as art electron acceptor. The process is very efficient because it maximizes the utilization of organic substrate for phosphorus and nitrogen removal. Further, the process solves the competition for organic substrate among Poly-p organisms and denitrifies as well as the problem of overgrowing of slow nitrifiers by fast organotrophs. An experimental lab-scale A(2)N system fed with domestic sewage was tested over a period of 260 days. The purpose of the experiment was to examine phosphorus removal capacity of a modified A(2)N two-sludge system. Factors affecting phosphorus and nitrogen removal by the A(2)N system were investigated. These factors were the influent COD/TN ratio, Sludge Retention Time (SRT), Bypass Sludgy Flow rate (BSF), and Return Sludge Flow rate (RSF). Results indicated that optimum conditions for phosphorus and nitrogen removal were the influent COD/TN ratio around 6.49, the SRT of 14 days, and the BSF and RSF were fixed about 26%-33% of influent flow rate.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据