摘要
试验采用SBR反应器处理低C/N生活污水,在温度为(25±0. 5)℃时,分别采用交替缺氧/好氧4次、交替好氧/缺氧5次和交替好氧/缺氧4次,时间比均为30 min∶30 min,NO2--N积累率在69、63和58周期分别达到96. 79%、98. 80%和98. 78%;同样温度下,控制好氧/缺氧时间比分别为30 min∶30 min、40 min∶20 min和30 min∶60 min,单周期交替次数为5、3和5时,NO2--N积累率于63、73及78周期时达到最大,其分别为98. 81%、97. 71%和94. 64%,对应AOB活性分别为96. 30、99. 27及102. 26,对其进行物料衡算,3种好氧/缺氧时间比下均存在同步硝化反硝化,同步硝化反硝化去除总氮分别为29. 89、28. 77及29. 78 mg·L-1.调整温度分别为18、25和30℃,在好氧/缺氧时间比为30 min∶30 min时,在第90、64和61周期时NO2--N积累率分别为99. 58%、99. 21%和95. 93%,污泥活性(f)达到最大所需时间分别为64、40及48周期,且污泥沉降性能均良好.
Low C/N domestic sewage was treated in a SBR.With an operating temperature of(25±0.5)℃,NO2--N accumulation rates reached 96.79%,98.80%,and 98.78%after 69,63,and 58 cycles,respectively.In each case,alternating modes of hypoxia/aerobic(four times),aerobic/anoxic(five times),and aerobic/anoxic(four times)were applied,respectively,with an alternating time of 30 min.At the same temperature,when the aerobic/anoxic time ratios were 30 min∶30 min,40 min∶20 min,and30 min∶60 min,and the single-cycle alternating times were 5,3,and 5,respectively,stable NO2--N accumulation rates reached98.81%,97.71%,and 94.64%after 63,73,and 78 cycles,respectively.The activity of AOB was 96.30,99.27,and 102.26,respectively.Simultaneous nitrification and denitrification occurred under the three aerobic/anoxic time ratios.The total amounts of nitrogen removed by synchronous nitrification and denitrification were 29.89,28.77,and 29.78 mg·L-1.When temperatures were adjusted to 18,25,and 30℃,and when the aerobic/anoxic time ratio was 30 min∶30 min,the NO2--N accumulation rates were99.58%,99.21%,and 95.93%after 90,64,and 61 cycles,respectively.The activity of the sludge(f)peaked when after 64,40,and 48 cycles,while the sludge-settling performance was good.
作者
刘安迪
赵凯亮
刘宏
黄利
倪蓉
陈永志
LIU An-di;ZHAO Kai-liang;LIU Hong;HUANG Li;NI Rong;CHEN Yong-zhi(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Lanzhou Railway Design Institute Co.,Ltd.,Lanzhou 730000,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2019年第10期4569-4577,共9页
Environmental Science
基金
国家自然科学基金项目(51668033)
甘肃省自然科学基金项目(18JR3RA126)
甘肃省高等学校特色专业-环境工程项目(101004)
兰州交通大学创新课题开放实验项目(010200200024)
关键词
短程硝化
交替模式
好氧/缺氧时间比
温度
物料衡算
shortcut nitrification
alternating mode
aerobic/anoxic time ratio
temperature
material balance
