温度对污水脱氮系统污染物去除效果及氧化亚氮释放的影响  

Effect of Temperature on Pollutant Removal and Nitrous Oxide Emission of Wastewater Nitrogen Removal System

作　　者：张婷婷[1] 张建[1] 杨芳 谢慧君[3] 胡振[1] 李一冉[1] 

机构地区：[1]山东大学环境科学与工程学院,济南250100 [2]微山县环境保护局,济宁277600 [3]山东大学环境研究院,济南250100

出　　处：《环境科学》2012年第4期1283-1287,共5页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07210-009-04);山东大学自主创新基金杰青培育项目(2009JQ009)

摘　　要：污水生物脱氮过程是大气中的氧化亚氮(N2O)的一个重要来源.以anoxic-oxic sequencing batch reactors(A/O SBRs)工艺为研究对象,考察了5组不同温度(10、20、25、30、35℃)条件下系统的污染物去除效果和氧化亚氮释放情况.结果表明,温度对COD的去除无显著影响,但对氮素的去除有明显影响:在一定范围内,随温度的升高氮的去除率升高,但温度超过25℃后,随着温度的上升氮的去除效果下降;温度对氧化亚氮的释放量有重要影响,随温度的升高氧化亚氮的释放量逐渐降低[释放量(以MLSS计)依次为:530.1、260.8、218.3、104.7、57.7μg.g-1].对于A/O SBRs工艺,氧化亚氮的释放主要集中的好氧段,缺氧段几乎无氧化亚氮释放.Biological nitrogen removal system is a significant source of nitrous oxide（N2O）.The effect of temperature（10,20,25,30,35℃） on the pollutant removal efficiencies and N2O emission characteristics of lab-scale A/O SBRs wastewater treatment process was evaluated.Results showed that temperature have no significant effect on the removal of COD while have a significant effect on the removal of nitrogen.During a certain range,as the temperature increasing the nitrogen removal rate increased.The nitrogen removal increased with the increase of temperature when it was below 25℃ and decreased with the increase of temperature when it was above 25℃.Significant impact of temperature on the N2O emission was also observed.N2O emission decreased with the increase of temperature（N2O emission： 530.1、 260.8、 218.3、 104.7、 57.7 μg·g-1）.For a lab-scale A/O SBRs treating wastewater,most of the N2O was produced during the aerobic phase,while no significant N2O emission can be detected during the oxide phase.

关 键 词：温度 氧化亚氮 污水生物脱氮 硝化反硝化 anoxic-oxic sequencing BATCH reactors(A/O SBRs) 

分 类 号：X703.1[环境科学与工程—环境工程]