首页 | 本学科首页   官方微博 | 高级检索  
     检索      

以甲醇为碳源生物反硝化过程释放一氧化二氮的试验研究
引用本文:翟晓峰,蒋成爱,吴光学,管运涛.以甲醇为碳源生物反硝化过程释放一氧化二氮的试验研究[J].环境科学,2013,34(4):1421-1427.
作者姓名:翟晓峰  蒋成爱  吴光学  管运涛
作者单位:1. 华南农业大学资源环境学院,广州,510642
2. 清华大学深圳研究生院,深圳,518055
基金项目:深圳市科工贸信委基础研究计划项目(JC201006030878A); 深圳市人居环境委员会环境科研基金项目
摘    要:污水生物反硝化脱氮过程是一氧化二氮(N2O)的重要释放源之一.试验采用序批式反应器以甲醇为碳源(电子供体),硝酸盐(NO3--N)为电子受体驯化反硝化菌,并采用批处理试验研究不同电子受体、不同碳氮(C/N)比和不同初始亚硝酸盐(NO2--N)质量浓度条件下N2O释放情况.在典型周期试验和批处理试验中均能检测到N2O的释放.以NO2--N为电子受体时会释放较多的N2O,而以NO3--N为电子受体时释放的N2O相对较少.不同C/N比通过影响反硝化菌的活性进而影响N2O的释放,反硝化菌的活性和N2O的释放量均随着C/N比的降低而降低.N2O的释放量随着初始NO2--N质量浓度的增加而增加,一定浓度范围内的NO2--N会增强反硝化菌的活性.初始NO2--N质量浓度与N2O的释放量具有较好的指数相关性.

关 键 词:一氧化二氮(N2O)  温室气体  反硝化  碳氮比  亚硝酸盐
收稿时间:2012/7/14 0:00:00
修稿时间:2012/8/29 0:00:00

Nitrous Oxide Emission During Denitrification for Activated Sludge Acclimated with Methanol as the Organic Carbon
ZHAI Xiao-feng,JIANG Cheng-ai,WU Guang-xue and GUAN Yun-tao.Nitrous Oxide Emission During Denitrification for Activated Sludge Acclimated with Methanol as the Organic Carbon[J].Chinese Journal of Environmental Science,2013,34(4):1421-1427.
Authors:ZHAI Xiao-feng  JIANG Cheng-ai  WU Guang-xue and GUAN Yun-tao
Institution:College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China;College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China;Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China;Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
Abstract:Denitrification of wastewater is one of the important sources of nitrous oxide (N2O). In this study, denitrifies were acclimated in a sequencing batch reactor with methanol and nitrate (NO3--N) as the electron donor and acceptor, respectively. N2O emission during denitrification was examined both in typical cycles and in batch experiments under conditions of different electron acceptors, carbon/nitrogen (C/N) ratios and initial nitrite (NO2--N) concentrations. With methanol as the organic carbon, the N2O emission was high with NO2--N as the electron acceptor and the N2O emission was low with NO3--N as the electron acceptor. The C/N ratios affected the emission of N2O by affecting activities of denitrifiers, and both the activity of denitrifiers and the emission of N2O decreased with decreasing C/N ratios. The N2O emission increased with increasing initial NO2--N concentrations, and a certain range of NO2--N concentrations enhanced the activity of denitrifiers. The N2O emission could be correlated very well with initial NO2--N concentrations.
Keywords:nitrous oxide(N2O)  greenhouse gas  denitrification  C/N ratios  nitrite
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《环境科学》浏览原始摘要信息
点击此处可从《环境科学》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号