Enhanced nutrient removal in a modified step feed process treating municipal wastewater with different inflow distribution ratios and nutrient ratios

Bioresource Technology
Shijian GeXu Cao

Abstract

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.

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Citations

May 15, 2013·Journal of Hazardous Materials·Farid Ahmed, Debora F Rodrigues
Oct 3, 2015·Environmental Science and Pollution Research International·Jian ZhangShuang Liang
Aug 25, 2015·Bioresource Technology·Adam Masłoń, Janusz A Tomaszek
Dec 25, 2010·Bioresource Technology·Shun-Hsing ChuangChia-Chuan Tai
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Oct 17, 2017·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Zhiying HanDezhao Liu
May 28, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Li DongZhang Jie
Jun 22, 2019·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Lihua SunTao Chen
Jul 25, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Yonglei WangZedong Zheng
Sep 30, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·J PodedwornaD Marciocha

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