短程脱氮中不同分段进水模式下氧化亚氮产量  

Production of N_2O of shortcut biological nitrogen removal with different step-feeding modes

作　　者：王莎莎[1,2] 汪传新[1] 巩有奎[1] 杨庆[1] 彭永臻[1] 

机构地区：[1]北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100124 [2]镇江市水业总公司,江苏镇江212001

出　　处：《中南大学学报（自然科学版）》2012年第12期4944-4948,共5页Journal of Central South University:Science and Technology

基　　金：'十一五'国家科技支撑计划重点项目(2009BAC57B01);国家自然科学基金资助项目(51008005);北京市属高等学校人才强教计划项目

摘　　要：利用SBR反应器,控制曝气量为60 L/h,考察实际生活污水在不同分段进水模式下短程脱氮过程中N2O的产量。结果表明:N2O主要产生在硝化阶段;随着分段进水段数的增加,NO2-的积累减少。不同进水方式下SBR短程脱氮N2O产量不同,3种进水方式N2O产量由小到大顺序为:3次进水,2次进水,1次进水。其原因是由于氨氧化细菌(AOB)主要是以NO2-为电子受体,以还原性氢或者氨为电子供体进行好氧反硝化。The production of N20 of domestic sewage with different step-feeding modes was inspected during shortcut biological nitrogen removal. Sequencing batch reactor was used in the experiment and the aeration was controlled at 60 L/h. The results show that N20 is mainly produced in the nitrification stage; the accumulation of NO2-decreases along with the increase of steps. The N20 output increasing order with different feeding modes is as follows one-step influent, two-step influent, and three-step influent. The reason is that ammonia-oxidizing bacteria used nitrite as electron acceptors and reducing hydrogen or ammonia as electron donors for aerobic denitrification.

关 键 词：生活污水 N0-2 分段进水 N2O 

分 类 号：X703[环境科学与工程—环境工程]