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把化学氧化与生化后处理工艺相结合,用于山东某化学合成药厂二级生化出水的深度处理。首先在化学氧化单元用Fenton试剂氧化二级生化出水中难降解有机物,改善其可生化性;然后用SBR反应器对化学氧化单元出水进行生化后处理,使最终出水水质符合新排放标准的要求,同时最大限度地降低运行成本。结果表明:该化学合成药厂二级生化出水(COD、NH_3-N分别为430、115 mg/L)经Fenton/SBR组合工艺深度处理后,其COD和NH_3-N值均低于《化学合成类制药工业水污染物排放标准》(GB 21904—2008)的排放限值,且Fenton氧化单元的运行成本约为1.52元/m~3,这对大多数企业来说还是能够承受的。
The combination of chemical oxidation and biochemical post-treatment process for the second-level biochemical chemical effluent of a chemical synthesis plant in Shandong depth treatment. Firstly, Fenton reagent in the chemical oxidation unit is used to oxidize the biodegradable organic substance in the biochemical effluent to improve its biodegradability; then, the biochemical post-treatment is performed on the effluent from the chemical oxidation unit by the SBR reactor so that the final effluent quality meets the requirements of the new discharge standard, While minimizing operating costs. The results showed that the COD and NH_3-N of secondary biochemical effluent (COD and NH_3-N were 430 and 115 mg / L, respectively) of the chemical synthesis factory were lower than those of “chemical synthesis Class pharmaceutical industry water pollutant discharge standards ”(GB 21904-2008) emission limits, and the Fenton oxidation unit operating costs about 1.52 yuan / m ~ 3, which for most businesses is still able to withstand.