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选用铁炭微电解+EF-Feox+混凝沉淀组合工艺,对增塑剂生产废水进行预处理。结果表明:微电解控制pH=3.0、HRT=120 min、m(Fe)/m(C)=3、气水比=8:1,EF-Feox控制pH=3.5、U=8 V、H2O2(3%)投加量20 m L/L、HRT=80 min,混凝沉淀控制p H=10、PAM(2‰)投加量1.5 m L/L、HRT=30 min,工艺稳定运行后COD从13 000mg/L左右降解到500 mg/L以下,去除率达到95%以上,出水BOD5、SS皆在200 mg/L以下,达到了污水综合排放标准(GB 8978-1996)的三级标准。同时,出水B/C提高到0.35左右,可生化性增强,有利于后续接生化反应器,以进一步降解有机物。微电解产生的Fe2+对EF-Feox反应能起到强化作用,在一定程度上可以加快EF-Feox反应。
Selection of iron carbon micro-electrolysis + EF-Feox + coagulation and sedimentation combination of plasticizer wastewater treatment. The results showed that the optimal conditions for the microelectrolysis were pH = 3.0, HRT = 120 min, m (Fe) / m (C) = 3, gas-water ratio = 8: 1, EF- 3%) dosage of 20 m L / L, HRT = 80 min, coagulation and sedimentation control p H = 10, PAM 2 ‰ dosage 1.5 m L / L, HRT = 30 min, From about 13 000 mg / L to 500 mg / L, the removal rate reached more than 95%. The effluent BOD5 and SS were both below 200 mg / L, reaching the Grade III standard for comprehensive wastewater discharge (GB 8978-1996). At the same time, the effluent B / C increased to about 0.35, biodegradability increased, conducive to the follow-up of biochemical reactors to further degrade the organic matter. The Fe2 + generated by micro-electrolysis can enhance the EF-Feox reaction and accelerate the EF-Feox reaction to a certain extent.