低温低氨氮SBR短程硝化稳定性试验研究  

Stability for shortcut nitrification in SBR under low ammonia atlow temperature

作　　者：张功良[1] 李冬[1] 张肖静[2] 曾辉平[1] 苏东霞[1] 周元正[1] 张杰[1,2] 

机构地区：[1]北京工业大学水质科学与水环境恢复工程北京市重点实验室,北京100124 [2]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090

出　　处：《中国环境科学》2014年第3期610-616,共7页China Environmental Science

基　　金：新世纪优秀人才支持计划(NCET-10-0008);国家水体污染控制与治理科技重大专项(2012ZX07202-005)

摘　　要：在11-15℃条件下,采用序批式反应器（SBR）研究（50±5）mg/L 氨氮浓度下短程硝化的稳定性.结果表明,2种溶解氧浓度（初始 DO浓度分别为0.9-1.5,4.5-5.0mg/L）下反应器均能达到良好的稳定性和去除效果,150个周期内亚硝化率一直维持在95%以上,氨氧化率85%以上,平均SVI为35.22mL/g,2种DO水平下的平均氨氮污泥负荷分别为0.15,0.23kgN/（kgMLSS·d）.当初始DO浓度为4.5-5.0mg/L时,21-23℃条件下无法实现短程硝化的稳定运行,经过42个周期亚硝化率降至70%,而31-33℃条件可以实现短程硝化的恢复并维持其稳定.经过不同温度条件下的对比分析及FISH试验研究,表明11-15℃与31-33℃均可抑制NOB的活性,从而有利于实现生活污水短程硝化的稳定运行.At 11-15℃, in SBR the stability of shortcut nitrification was researched under low ammonia nitrogen （55±5mg/L）. Results show that system could achieve good stability and removing effect under two kinds of the DO level （initial DO 0.9-1.5, 4.5-5.0mg/L）.In 150cycles the nitrosation rate had been maintained above 95%, ammonia oxidation rate was more than 85%, and the average SVI was 35.22mL/g. At two DO average levels ammonia nitrogen removal Sludge load was 0.15, 0.23kgN/（kgMLSS·d） respectively. When the initial DO was 4.5-5.0mg/L, at 21-23℃ stable operation of the shortcut nitrification cannot be realized.Nitrosation rate fell to 70% after 42cycle.Butthe shortcut nitrificationcan be restored at 31-33℃. In this analysis and FISH test research, the activity of the NOB can be inhibited at 11-15℃ and 31-33℃ so that shortcut nitrification has a stable operation.

关 键 词：低温 稳定性 短程硝化 

分 类 号：X703.1[环境科学与工程—环境工程]