连续流反应器短程硝化的快速启动与维持机制  

Quick Start-up and Sustaining of Shortcut Nitrification in Continuous Flow Reactor

作　　者：吴鹏[1,2] 张诗颖[1] 宋吟玲[1,2] 徐乐中[1,2] 沈耀良[1,2,3] 

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009 [2]江苏省水处理技术与材料协同创新中心,苏州215009 [3]江苏省环境科学与工程重点实验室,苏州215009

出　　处：《环境科学》2016年第4期1472-1477,共6页Environmental Science

基　　金：国家自然科学基金项目(51578353);江苏省高校自然科学研究重大项目(12KJA610002);苏州市环境保护科技项目(B20130502);江苏高校优势学科建设工程项目;环境工程江苏省重点专业类项目;苏州科技学院科研基金青年项目(XKQ201504)

摘　　要：如何快速稳定地启动短程硝化工艺对低C/N比废水的处理具有十分重要的实际应用价值.针对城市污水厂以连续流工艺为主的现状,故对连续流反应器短程硝化的快速启动与维持进行研究.结果表明,利用间歇曝气,依次控制3个阶段的停/曝时间(15 min/45 min、45 min/45 min和30 min/30 min),连续流反应器经过60 d左右的运行,可以成功实现短程硝化的快速启动.控制停/曝时间为30 min/30 min,进水氨氮浓度为50或100 mg·L^(-1)时,亚硝化率分别可达90%或95%.另外,间歇曝气有利于抑制硝化菌(NOB)的活性,而缩短水力停留时间(HRT)可淘洗出NOB,两者结合可以更好地维持短程硝化.How to achieve fast and stable startup of shortcut nitrification has a very important practical value for treatment of low C / N ratio wastewater. Thus,the quick start-up and sustaining of shortcut nitrification were investigated in continuous flow reactor targeting at the current situation of urban wastewater treatment plant using a continuous flow process. The results showed that quick start-up of shortcut nitrification could be successfully achieved in a continuous flow reactor after 60 days＇ operation with intermittent aeration and controlling of three stages of stop / aeration time（ 15 min /45 min,45 min /45 min and 30 min /30 min）. The nitrification rates could reach 90% or 95% respectively,while influent ammonia concentrations were 50 or 100 mg·L^-1 with stop / aeration time of 30 min /30 min. In addition,intermittent aeration could inhibit the activity of nitrite oxidizing bacteria（ NOB）,while short hydraulic retention time（ HRT） may wash out NOB. And a combined use of both measures was beneficial to sustain shortcut nitrification.

关 键 词：连续流反应器 短程硝化 低C/N比污水 间歇曝气 

分 类 号：X703.1[环境科学与工程—环境工程]