济二煤矿生产废水降本减排技术的应用研究

APPLICATION OF TECHNOLOGIES FOR REDUCING WASTEWATER TREATMENT COST AND EFFLUENT DISCHARGE IN JINING NO.2 COAL MINE

为了降低济二煤矿生产废水处理成本、有效减少悬浮物、COD、石油类污染物排放量,采用分质处理及强化预处理等方式进行工艺改造。应用结果表明:济二煤矿生产废水基本实现分质处理、分质利用,药剂成本由改造前的0.7元/t降低到0.3元/t,矿井水井下提升电费成本由改造前的0.85元/t降低到0.6元/t,出水pH 6~9、CODCr≤20 mg/L、SS≤10 mg/L、石油类≤3 mg/L。

The wastewater treatment technologies in Jining No.2 coal mine were modified by treating separately according to different water quality and enhancing pretreatment. The modified technologies aimed at reducing the treatment cost and the emissions of suspended solid（SS）, COD and petroleum pollutants. The results show that the wastewater from Jining No.2 coal mine has basically been treated and reused separately according to different water quality. The reagent cost decreases from 0.70 to 0.30 yuan/t. The electricity cost for underground hydraulic lifting decreases from 0.85 to 0.60 yuan/t. The effluent pH ranges from 6 to 9. The effluent concentrations of CODCr, SS and petroleum pollutants are lower than 20 mg/L, 10 mg/L, 3 mg/L respectively.