用生物脱氮工艺处理焦化废水

Treatment of coking waste by bio-denitrifying process

介绍了采用A2 /O生物脱氮工艺处理焦化废水的工艺流程 ,重点阐述了污泥的培养、驯化和运行管理及应注意的问题。该工艺特点在于在一般缺氧 好氧工艺的基础上增加厌氧工段 ,从而较好地对污水水解酸化 ,提高处理效率。氨氮去除率大于 60 % ,COD去除率大于 70 % ,处理后的回用水水质符合工艺要求 ,用作熄焦及洗煤补充水。

A process of wastewater treatment is introduced. Cultivation, docility, operation management and problems existing in sewage treatment are stressed. The process contains three steps as follows, pre-treatment, bio-treatment and post-treatment including an anaerobic sewage treatment process. The rate of denitrifying and deammoniation is more than 60%, and the rate of reduction of COD is more than 70%. The water after treatment can be used for extinction of coke and coal washing.