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Treatment of Pharmaceutical and Chemical Wastewater by Physicochemical/Hydrolysis/Contact Oxidation Process

YU Jian-ming

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Abstract

The physicochemical(coagulation and electrolytic oxidation)/hydrolysis/contact oxidation process was used to treat pharmaceutical and chemical wastewater.The wastewater treatment capacity is 200 m3/d,in which high-concentration COD is 30 000 mg/L,and low-concentration COD is 3 000 mg/L.The treatment practice indicates that the combination of electrolytic oxidation with hydrolytic acidification can improve the wastewater biodegradability obviously.The removal rate of COD in contact oxidation tank is about 70%,and that in the total treatment system is 95%.The effluent COD is less than 300 mg/L and pH is 7.92 to 8.27.The effluent quality reaches the second level criteria specified in the Integrated Wastewater Discharge Standard(GB 8978-1996).

About this research paper

What this paper is about

The physicochemical(coagulation and electrolytic oxidation)/hydrolysis/contact oxidation process was used to treat pharmaceutical and chemical wastewater.The wastewater treatment capacity is 200 m3/d,in which high-concentration COD is 30 000 mg/L,and low-concentration COD is 3 000 mg/L.The treatment practice indicates that the combination of electrolytic oxidation with hydrolytic acidification can improve the wastewater biodegradability obviously.The removal rate of COD in contact oxidation tank is about 70%,and that in the total treatment system is 95%.The effluent COD is less than 300 mg/L and pH is 7.92 to 8.27.The effluent quality reaches the second level criteria specified in the Integrated Wastewater Discharge Standard(GB 8978-1996).

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Available abstract

The physicochemical(coagulation and electrolytic oxidation)/hydrolysis/contact oxidation process was used to treat pharmaceutical and chemical wastewater.The wastewater treatment capacity is 200 m3/d,in which high-concentration COD is 30 000 mg/L,and low-concentration COD is 3 000 mg/L.The treatment practice indicates that the combination of electrolytic oxidation with hydrolytic acidification can improve the wastewater biodegradability obviously.The removal rate of COD in contact oxidation tank is about 70%,and that in the total treatment system is 95%.The effluent COD is less than 300 mg/L and pH is 7.92 to 8.27.The effluent quality reaches the second level criteria specified in the Integrated Wastewater Discharge Standard(GB 8978-1996).

Key concepts: Effluent, Wastewater, Hydrolysis, Biodegradation, Chemistry, Oxidation process, Chemical oxygen demand, Pulp and paper industry

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