Realization and performance of nitrification via nitrite in CAST process at normal temperature
常温条件下CAST工艺亚硝酸型硝化的实现及特性

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 re...