摘要
在常温条件下（20-25 ℃），分别采用间歇曝气SBR（1号）和连续曝气SBR（2号），研究4个不同初始DO质量浓度（0.5-1.0，1.5-2.0，2.5-3.0和3.5-4.0 mg/L）下生活污水的亚硝化。研究结果表明：2个反应器的COD去除效果相差不大；运行50 d后，1号反应器的氨氮去除容积负荷比2号的大，且4个DO质量浓度下亚硝化率均在90%以上，而当2号反应器的DO质量浓度为3.5-4.0 mg/L时，亚硝化率由90%逐渐下降至72.9%，后采用间歇曝气经15 d成功使其亚硝化率恢复至90%。间歇曝气反应器内污泥中亚硝化菌的相对数量比连续曝气反应器的多，硝化菌则比连续曝气反应器的小。间歇曝气在节省能耗的同时可以稳定实现较高的氨氧化速率和亚硝化率，是常温生活污水SBR短程硝化长期高效稳定运行的有效手段。
The shortcut nitrification for different initial DO mass concentrations（0.5-1.0, 1.5-2.0, 2.5-3.0 and 3.5-4.0 mg/L） was studied with the intermittent aeration SBR （No. 1） and the continuous aeration SBR （No. 2） treating domestic wastewater at normal temperature of 20-25 ℃. The results show that there are no fundamental real distinctions in COD removal efficiency between No. 1 and No. 2. Also, when the two reactors run for 50 d, the ammonia nitrogen removal volume loading of No. 1 is more than No. 2. The nitrosation rate of 1# is still above 90% during four DO periods, while the nitrosation rate of No. 2 decrease from 90% to 72.9% gradually after the DO mass concentration is increased to 3.5-4.0 mg/L and then it takes 15 d to make the nitrosation rate of No. 2 back to 90% by the use of intermittent aeration. The relative quantity of ammonia oxidizing bacteria is more and the relative quantity of nitrite oxidizing bacteria is less in the intermittent aeration reactor. Therefore, the intermittent aeration which has higher ammonia oxidation rate, then itrosation rate and energy saving, is an effective means to maintain efficient and stable shortcut nitrification of domestic wastewater and at normal temperature for long-term operation of SBR.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第6期2120-2129,共10页
Journal of Central South University:Science and Technology
基金
新世纪优秀人才支持计划项目(NCET-10-0008)
国家水体污染控制与治理科技重大专项(2012ZX07202-005)
关键词
常温
生活污水
间歇曝气
连续曝气
短程硝化
SBR
normal temperature
domestic wastewater
intermittent aeration
continuous aeration
shortcut nitrification
SBR
