文献类型：期刊文献

中文题名：Preliminary study of groundwater denitrification using a composite membrane bioreactor

作者：Lihui ZHANG[1];Guomin CAO[1];Yulei FEI[1];Hong DING[1];Mei SHENG[1];Yongdi LIU[1]

机构：[1]Research Institute of Environmental Engineering,East China University of Science and Technology,Shanghai 200237,China

年份：2011

卷号：5

期号：4

起止页码：604

中文期刊名：Frontiers of Environmental Science & Engineering

外文期刊名：环境科学与工程前沿（英文）

收录：Scopus;CSCD:【CSCD2011_2012】；PubMed;

基金：This research was supported by the Mega-projects of Science Research for Water Environment Improvement(No.2008ZX07425-001-04).

语种：英文

中文关键词：groundwater;nitrate;denitrification;composite membrane bioreactor(CMBR);immobilized cell membrane

摘要：A composite membrane bioreactor(CMBR)integrating the immobilized cell technique and the membrane separation technology was developed for groundwater denitrification.The CMBR had two well mixed compartments with one filled with the nitratecontaining influent and the other with a dilute ethanol solution;the compartments were separated by the composite membrane consisting of a microporous membrane facing the influent and an immobilized cell membrane facing the ethanol solution.Nitrate and ethanol molecules diffused from the respective compartments into the immobilized cell membrane where nitrate was reduced to gaseous nitrogen by the denitrifying bacteria present there with ethanol as the carbon source.The microporous membrane was attached to one side of the immobilized cell membrane for retention of the disaggregated bacteria.Relative to the single dose of external ethanol,the twodose supplementation produced better treatment results as evidenced by the lower concentrations of NO_(3)^(-)-N and ethanol(as measured by total organic carbon)of the effluent.The batch treatment in CMBR removed most of the nitrate in the influent and attained a stable denitrification rate of 0.1 g·m^(-2)·h^(-1)for most of the 96-h cycles during the 30-cycle study.The effluent was essentially free of ethanol and nitrite nitrogen.