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Catalytic WAO Effluent Water Treatment System

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Catalytic WAO Effluent Water Treatment System

  • Catalytic WAO Effluent Water Treatment System
  • Reaction and reforming technology

High-efficiency liquid-phase oxidation reaction process is used effectively for treating wastewater with intermediate/low concentration of COD components. The system requires no application for the Waste Management and Public Cleansing Law as no fuel is used to treat wastewater under increased temperature and pressure. Combined with the catalytic technology from Nippon Shokubai Co., Ltd., the system achieves further space and energy savings.

Features

・Combustion is not applied, requiring no fuel, and exhaust gas does not include NOx, SOx, and dioxins.
・No secondary waste such as excess sludge as in biotreatment is generated. The system is applied to wastewater that is difficult to handle through biotreatment.

Semiconductor,LCD / Petrochemical / Medical,Food,Biochemical

Detoxifying COD components in Effluent water by catalyst with high-efficiency liquid phase oxidation reaction WAO is a high-efficiency liquid-phase oxidation reaction process developed under technical license from Nippon Shokubai Co., Ltd. High running costs were a drawback for conventional combustion treatment. With WAO, a solid catalyst performs efficient liquid-phase oxidation and decomposition of COD components such as organic, nitrogen and sulfuric compounds in effluent water, at high temperature and high pressure. WAO not only exhibits high performance for persistent cases that are difficult with biological treatment, but is effective for treating effluent water with much inorganic COD components as well.

Comparison of WAO with Combustion Treatment

Saves energy as fuel is not required
Decreases environmental load as NOx SOx and dioxins are not included in exhaust gas
No application is required to install WAO in relation to Waste Disposal Law

Comparison with biological treatment

No generation of secondary waste such as organic sludge typically associated in biological treatment
Running cost is 2/3 or less and footprint is 1/3 or less

・Advanced treatment recycles treated effluent as service water
・No secondary pollution as catalyst itself is non-toxic
・Treats wastewater that is difficult to treat biologically
・Exhaust gas contains no NOx, SOx or dioxins
・Treats 10~500 ton/day of compounds
・Applies for decolorization

  • ・Main Application
    Removal and detoxification of COD components in effluent water
     
    ・WAO Process
    WAO process decomposes organic compounds into air, oxidant, CO2 and water in the catalytic reaction chamber. Nitrogen compounds are decomposed into N2, generating virtually no NOx. Sulfuric compounds are detoxified after their sulfur components are changed into Na2SO4 through decomposition with a catalyst and addition of NaOH solution.
     
    ・Operative Conditions
    Low / pressure method
    ~0.9MPaG(9kgf/c㎡),
    ~165℃ (Pressure vessels of Grades 1 and 2)
     
    High / pressure method
    ~7.3MPaG(73kgf/c㎡),
    ~265℃ (High-Pressure Gas Safety Law, Pressure vessel of Grade 1)
     
    How to Verify
    To install +WAO, a test to verify the applicability of the catalytic treatment device is required.

High-performance catalysts

  • High-performance catalysts
  • ・We use high-performance catalysts made by Nippon Shokubai Co., Ltd.
    ・Catalysts with excellent durability are selected to meet conditions of wastewater.

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