Simultaneous nitrogen and phosphorus removal under low dissolved oxygen conditions
A full-scale test was operated by using low dissolved oxygen activated sludge process to enhance biological nitrogen and phosphorus removal. When the influent concentrations of CODCr, TN and TP varied in a range of 352.9 mg/L-1338.2 mg/L, 34.4 mg/L-96.3 mg/L, and 2.21 mg/L-24.0 mg/L, the average removal efficiencies were 94.9%, 86.7% and 93.0%, respectively. During the test period of two months, effluent meas of CODCr, BOD5, NH3-N, TN and TP were below 50 mg/L, 25 mg/L, 10 mg/L and 1.0 mg/L, respectively. The low dissolved oxygen activated sludge process has a simple flow sheet, fewer facilities and high N and P removal efficiency. It is very convenient to retrofit the conventional activated sludge process with the above process.
作 者： XIA Si-qing GAO Ting-yao ZHOU Zeng-yuan 作者单位： School of Environmental Science and Engineering, Tongji University, 刊 名： 环境科学学报(英文版) ISTIC SCI 英文刊名： JOURNAL ENVIRONMENTAL SCIENCES 年，卷(期)： 2001 13(1) 分类号： X131.2 关键词：