Project example of treating wastewater formed in coating polyvinyl chloride kettle
In response to the shortcomings of wastewater formed in coating PVC kettle,such as poor biodegradability,high concentration of organic and suspended solids,and large fluctuations in water quality and quantity,a process which combined regulating tank,coagulation sedimentation tank,hydroly-sis acidification tank,biological contact oxidation tank,and ozone advanced oxidation tower(AOPs)was selected to treat the wastewater.The average influent quality of the wastewater was pH 6.5,CODcr 2 000 mg/L,and suspended solids 470 mg/L.After treatment by the combined process,the average effluent water quality was pH7.4,CODcr34 mg/L,and suspended solids9 mg/L.The main indicators conformed to the Class A standard of GB 18918-2002 Discharge standard of pollutants for municipal wastewater treatment plant.
PVCcoating kettlewastewatercoagulation and precipitationadvanced hydrolytic acidificationcontact oxidation methodadvanced ozone oxidationengineering example
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