摘要
采用SBR反应器在间歇曝气模式下对搁置2个月的短程硝化污泥进行恢复,控制曝气量分别为120、100、80和60L·h-1,在温度为25℃、交替好氧/缺氧时间比为30 min/30 min条件下处理实际生活污水,进水氨氮浓度为50~80 mg·L^(-1),出水氨氮浓度分别在第12、18、21和21周期之后稳定在5 mg·L^(-1)以下,氨氮去除率均高达95.00%左右;第30、35、38和42周期时,亚硝氮积累浓度分别达到20.83、22.81、21.50和20.73 mg·L^(-1),硝氮出水浓度均低于0.5 mg·L^(-1),亚硝积累率均高于99%,氨氧化菌(AOB)活性最终均稳定在100.00%左右,而亚硝酸盐氧化菌(NOB)活性逐渐被抑制,4种曝气量下均成功实现了短程硝化的恢复.
Shortcut nitrification sludge,which was set aside for two months,was recovered using Reactors Ⅰ,Ⅱ,Ⅲ,and Ⅳ. The aeration rates of Reactors Ⅰ,Ⅱ,Ⅲ,and Ⅳ were 120,100,80,and 60 L·h-1,respectively,while treating real domestic sewage,and the ratio of aerobic/anoxic was 30 min/30 min at the temperature of 25℃. The influent of ammonia was 50-80 mg·L^（-1）,and the concentration of effluent ammonia was stable,at below 5 mg·L^（-1）,after the 12 th,18 th,21 st,and 21 stcycles. The removal ratio of ammonia nitrogen was about 95%. The highest concentrations of nitrite for Reactors Ⅰ,Ⅱ,Ⅲ,and Ⅳ were 20. 83,22. 81,21. 50,and 20. 73 mg·L^（-1）,respectively,which occurred in the 30 th,35 th,38 th,and 42 ndcycles,respectively. The concentrations of effluent nitrate were lower than 0. 5 mg·L^（-1）,and the nitrite accumulation rates were higher than 99%. The activity of ammonia-oxidizing bacteria（ AOB） increased gradually and finally stabilized at 100. 00%; however,the activity of nitrite-oxidizing bacteria（ NOB） was gradually inhibited. The recovery of shortcut nitrification was achieved successfully in the different aeration modes.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2018年第2期865-871,共7页
Environmental Science
基金
国家自然科学基金项目(51668033)
甘肃省高等学校特色专业(101004)
兰州交通大学教改重点项目
大学生创新实验项目(2017063)
关键词
间歇曝气
曝气量
短程硝化
活性恢复
SBR
intermittent aeration
aeration rate
shortcut nitrification
activity recovery
SBR
