Design Case of Technology Transformation Project for Treatment of Wastewater Containing Polyvinyl Alcohol
The design scale of the wastewater treatment plant of a papermaking enterprise in Jiangmen City,Guangdong Province is 3200 m3·d-1.The original design effluent quality is class Ⅳ specified in environmental quality standard for surface water(GB 3838-2002).Due to the improvement of the company's process,the substances contained of the wastewater have changed.Due to the low biodegradability of polyvinyl alcohol,it can not be directly degraded by the existing wastewater treatment system.Therefore,after comprehensively considering the characteristics of the influent water quality,the investment cost and pollutant removal efficiency,a technical transformation scheme of pretreatment of high concentration wastewater containing polyvinyl alcohol+advanced treatment of mixed wastewater is proposed.The advanced oxidation technology is used to degrade and remove polyvinyl alcohol,so that the effluent can finally meet the discharge standard.
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