Nitrogen removal and simultaneous nitrification and denitrification in a fluidized bed step-feed process

作     者：BingWang Wei Wang Hongjun Han Hongbo Hu Haifeng Zhuang 

作者机构：State Key Laboratory of Urban Water Resources and Environment （SKLUWRE） Harbin Institute of Technology Harbin 150090 China Municipal ＆ Environmental Engineering College Shenyang Jianzhu University Shenyang 110168 China School of Civil and Hydraulic Engineering Hefei University of Technology Hefei 230009 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2012年第24卷第2期

页      面：303-308页

核心收录：

学科分类：090502[农学-动物营养与饲料科学] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0905[农学-畜牧学] 08[工学] 09[农学] 

基　　金：supported by the National High Technology Research Development Program (863) of China(No. 2007AA06A411) the Science and Technology Research Projects of Heilongjiang Education Committee(No. 11551130) 

主　　题：denitrification fluidized bed step-feed simultaneous nitrification and denitrification 

摘      要：For urban wastewater treatment,we conducted a novel four-stage step-feed wastewater treatment system combined with a fluidized bed laboratory experiment to investigate chemical oxygen demand（COD）,NH4＋-N,and total nitrogen（TN） removal performance.The removal rates of COD,NH4＋-N and TN were 88.2%,95.7%,and 86.4% with e？uent concentrations of COD,NH4＋-N and TN less than 50,8,and 10 mg/L,respectively.Biomass and bacterial activities were also measured,with results showing more nitrobacteria in the activated sludge than in the biofilm;however,bacterial activity of the biofilm biomass and the activated sludge were similar.Nitrogen concentrations during the process were also detected,with simultaneous nitrification and denitrification found to be obvious.