Enhanced nutrient removal in a modified step feed process treating municipal wastewater with different inflow distribution ratios and nutrient ratios
Enhanced nutrient removal in a modified step feed process treating municipal wastewater with different inflow distribution ratios and nutrient ratios
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DOI：
10.1016/j.biortech.2010.06.151
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发表时间：
2010-12-01
影响因子：
11.4
通讯作者：
Cao, Xu
中科院分区：
文献类型：
--
作者：
Ge, Shijian;Peng, Yongzhen;Cao, Xu
提出了一种中试规模改进的分步进料工艺，以提高城市废水中有机物和营养物（N 和 P）的去除性能。它结合了开普敦大学（UCT）和步进进料工艺。研究了流入分配比和养分比的影响。当进水分配比为40:30:30%时，化学需氧量(COD)、总氮(TN)和磷的最高去除效率分别为89%、88%和93%。随着进水COD/P和TN/P的增加，除磷量呈上升趋势，脱氮量与进水COD/TN呈正相关。此外，好氧同步硝化反硝化和缺氧反硝化吸磷对增强养分去除有明显贡献。由于相对较高的营养物去除率、强大的污泥沉降性和节能性，所提出的系统被证明是一种对废水处理厂有吸引力的增强型生物营养物去除工艺。 (C) 2010 Elsevier Ltd. 保留所有权利。
A pilot-scale modified step feed process was proposed to enhance organics and nutrient (N and P) removal performance from municipal wastewater. It combined University of Cape Town (UCT) and step feed process. Effects of inflow distribution ratios and nutrients ratios were investigated. The highest removal efficiencies of 89% for chemical oxygen demanding (COD), 88% for total nitrogen (TN) and 93% for phosphorus were obtained, respectively, at the inflow distribution ratio of 40:30:30%. The phosphorus removal exhibited an upward trend with the increasing of influent COD/P and TN/P, and the nitrogen removal had a positive correlation with influent COD/TN. In addition, aerobic simultaneous nitrification and denitrification and anoxic denitrifying phosphorus uptake made a distinct contribution to enhance nutrient removal. The proposed system was demonstrated to be an attractive enhanced biological nutrient removal process for wastewater treatment plants due to relatively high nutrient removal, robust sludge settleability and energy savings. (C) 2010 Elsevier Ltd. All rights reserved.