DNT废水铁炭微电解+生化处理工程实例

摘要

甘肃某公司二硝基甲苯（DNT）生产废水处理站设计处理规模1600 m3/d，采用铁炭微电解+UASB+接触氧化+BAF+生物炭工艺进行处理，进水COD、硝基苯类化合物分别为2089、164.9 mg/L，pH 1~2；出水COD、硝基苯类化合物分别为39.5、0.3 mg/L，去除率分别为98.1%、99.8%，排水指标优于国家《污水综合排放标准》（GB 8978-1996）一级标准，吨水直接处理成本为7.62元。%The designed treatment scale of the DNT industrial wastewater plant in a company in Gansu Province is 1 600 m3/d. The wastewater has been treated by ferric-carbon micro-electrolysis+UASB+contact oxidation+BAF+bi-ological activated carbon process. Its influent COD is 2 089 mg/L,nitro-compounds 164.9 mg/L,and pH 1-2. Its ef-fluent COD is 39.5 mg/L and nitro-compounds 0.3 mg/L. The removing rate of COD and nitro-compounds are 98.1%and 99.8%,respectively. The indexes of discharged water is superior to Class A of Integrated Wastewater Discharge Standard(GB 8978-1996). The cost of wastewater treatment per ton is CN￥7.62.