环境工程学报2011，Vol.5Issue(7)：1454-1458,5.
常温条件下CAST工艺亚硝酸型硝化的实现及特性
Realization and performance of nitrification via nitrite in CAST process at normal temperature
摘要
Abstract
Simulated domestic sewage was treated through the cyclic activated sludge technology (CAST) , results showed that through aeration duration control, partial nitrification was carried out in a lab-scale SBR at normal temperature, when DO concentration ranged from 0. 13 mg/L to 0. 74 mg/L,and partial nitrification was maintained for a long time when DO concentration rised to 0. 7 ~ 3. 36 mg/L. Accumulation rate of nitrite was steadily kept over 90% , average total nitrogen removal rate of effluent was 68% after a sludge retention time, though accumulation rate of nitrite was low and fluctuated at the initial experimental stage. The SVI of the system was about 105,during the experiment the sludge was in good settlement, no sludge bulking. At the same time, according to the comparion of nitrification rate of nitrous nitrification and complete nitrification, ammonia oxidation rate dropped from 8 mg NH4-N/g MLSS · H to 6 mg NH4-N/g MLSS · H. In addition, partial nitrification could be transformed into complete nitrification even through accumulation rate of nitrite was steadily kept , if aeration time and the DO concentration were unreasonably controlled.关键词
短程硝化/常温/低溶解氧/硝化速率Key words
partial nitrification/ normal temperature/ low DO concentration/ ammonia oxidation rate分类
资源环境引用本文复制引用
刘艳辉,孙力平,王少坡,刘媛,于静洁,李玉友..常温条件下CAST工艺亚硝酸型硝化的实现及特性[J].环境工程学报,2011,5(7):1454-1458,5.基金项目
国家自然科学基金资助项目(50808128)；国家“水体污染控制与治理”科技重大专项(2008ZX07209-006)；中国博士后科学基金资助项目(20090460182) （50808128）
