又大又紧又粉嫩18p少妇,国产精品久久久久久一区二区三区,手机在线看永久av片免费,无码人妻少妇色欲av一区二区

Sludge water biological nitrogen removal project of a sewage treatment plant

時間:2017-02-08

A sewage treatment plant wastewater COD 1200 mg / L, TN 1500 mg / L, is a highly difficult to treat high concentration ammonia wastewater. The company adopts the Xiaolong-Anqi denitrification process, and the designed treatment scale is 560 t/d, effluent COD≤500 mg/L, NH4+-N≤35 mg/L, TN≤250 mg/L. Compared with the traditional denitrification process, this project does not need to add additional carbon sources, and saves 60% of the aeration.