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川西北矿脱硫厂的生产污水,含污染物种类较多,污染物浓度变化也很大,有原始数据记载化学耗氧量 COD,1984年年平均4000～5000mg/L,1985年2月月平均3046mg/L,3月月平均1994mg/L。原设计采用 COD800mg/L 以下进行生化处理,以现有45m~3生化池二座(每座内有蜂窝填料30m~3),日平均污水量200m~3进行复算,已超负荷5倍以上。据二年多时间的污水处理原始数据说明,处理后达不到国家排放标准,COD—直超标,同时带有颜色和味。针对此问题,利用漂白粉(CaOCl_2)做了 COD 化学降解试验,现将试验效果报告如下。
The desulphurization plant in northwestern Sichuan has a large amount of pollutants and pollutant concentrations. There are primary data on chemical oxygen demand (COD), annual average of 4000-5000mg / L in 1984, monthly average of February 1985 3046mg / L, March average of 1994mg / L. The original design COD800mg / L the following biochemical treatment, the existing 45m ~ 3 biochemical pool two (each with a honeycomb packing 30m ~ 3), the average daily sewage volume of 200m ~ 3 re-calculation, has been overloaded more than 5 times . According to more than two years of raw sewage treatment data show that after treatment reach the national emission standards, COD-exceeded, with a color and taste. In response to this problem, the use of bleaching powder (CaOCl_2) COD chemical degradation test done, the test results are reported below.