Nitrogen removal and simultaneous nitrification and denitrification in a fluidized bed step-feed process |
| |
| Authors: | Bing Wang Wei Wang Hongjun Han Hongbo Hu and Haifeng Zhuang |
| |
| Institution: | 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;State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), Harbin Institute of Technology, Harbin 150090, China;State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), Harbin Institute of Technology, Harbin 150090, China;State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), Harbin Institute of Technology, Harbin 150090, China |
| |
| Abstract: | 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 effluent 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. |
| |
| Keywords: | denitrification fluidized bed step-feed simultaneous nitrification and denitrification |
| 本文献已被 ScienceDirect PubMed 等数据库收录！ |
| 点击此处可从《环境科学学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《环境科学学报(英文版)》下载免费的PDF全文 |
|
