Application of Ozone Oxidation + A/O + Ozone Oxidation Process in Sewage Treatment Plant of Chemical Industrial Park
The composition of wastewater in chemical industrial parks is complex,and there are many difficult to degrade substances.A sewage treatment plant in a certain chemical industrial park adopts a pre-treatment process of qualitative enhanced coagulation sedimentation + ozone oxidation,while adopting a secondary treatment process of hydrolysis acidification + Anaerobic/Oxic(A/O)and a deep treatment process of coagulation sedimentation + ozone oxidation.The actual operation results show that the average removal rate of Chemical Oxygen Demand(COD)by this combination process is 85.7%,and the COD removal effect is good,and the effluent quality is superior to the first level a standard of the"Pollutant Discharge Standard for Urban Sewage Treatment Plants"(GB 18918-2002).
chemical wastewaterqualitative treatmentcoagulation sedimentationozone oxidationAnaerobic/Oxic(A/O)
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