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    The process of chemical biological flocculation is a new type of chemical enhanced primary treatment.

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    The traditional single stage biological treatment has not been met the demend of sewage treatment in petrochemical plant.

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    Sanitary sewage up to national Grade 1 emission standard after the treatment of regulation, precipitation and sterilization by CL buried sewage treatment plant.

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    Sanitary sewage up to national Grade 1 emission standard after the treatment of regulation, precipitation and sterilization by CL buried sewage treatment plant.

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