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2003•Journal of Zhejiang University(Engineering Science)Requires access

Wet air oxidation of orthochlorophenol wastewater

Xu Xin

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Abstract

Orthochlorophenol wastewater was treated by various Wet Air Oxidation (WAO) methods. Parameters such as reaction temperature, Oxygen pressure, and catalyst activity were investigated in terms of chemical oxygen demand (CODCr) removal rate. Experimental results showed that WAO process without catalyst is also effective for treatment of the Orthochlorophenol wastewater, up to 80% of the initial CODCr was removed by Wet Air Oxidation at 270℃ with stoichiometric oxygen supply. While at temperature of 150℃, the CODCr removal rate was only 30%. High removal of CODCr were obtained by Catalytic Wet Air Oxidation (CWAO) at a relatively lower temperature of 150℃, Fe2(SO4)3, FeSO4, CuSO4 and MnSO4 exhibited high catalytic activity, up to more than 96% of the initial CODCr was removed by CWAO at 200℃.

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What this paper is about

Orthochlorophenol wastewater was treated by various Wet Air Oxidation (WAO) methods. Parameters such as reaction temperature, Oxygen pressure, and catalyst activity were investigated in terms of chemical oxygen demand (CODCr) removal rate. Experimental results showed that WAO process without catalyst is also effective for treatment of the Orthochlorophenol wastewater, up to 80% of the initial CODCr was removed by Wet Air Oxidation at 270℃ with stoichiometric oxygen supply. While at temperature of 150℃, the CODCr removal rate was only 30%. High removal of CODCr were obtained by Catalytic Wet Air Oxidation (CWAO) at a relatively lower temperature of 150℃, Fe2(SO4)3, FeSO4, CuSO4 and MnSO4 exhibited high catalytic activity, up to more than 96% of the initial CODCr was removed by CWAO at 200℃.

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Available abstract

Orthochlorophenol wastewater was treated by various Wet Air Oxidation (WAO) methods. Parameters such as reaction temperature, Oxygen pressure, and catalyst activity were investigated in terms of chemical oxygen demand (CODCr) removal rate. Experimental results showed that WAO process without catalyst is also effective for treatment of the Orthochlorophenol wastewater, up to 80% of the initial CODCr was removed by Wet Air Oxidation at 270℃ with stoichiometric oxygen supply. While at temperature of 150℃, the CODCr removal rate was only 30%. High removal of CODCr were obtained by Catalytic Wet Air Oxidation (CWAO) at a relatively lower temperature of 150℃, Fe2(SO4)3, FeSO4, CuSO4 and MnSO4 exhibited high catalytic activity, up to more than 96% of the initial CODCr was removed by CWAO at 200℃.

Key concepts: Wet oxidation, Chemical oxygen demand, Wastewater, Catalysis, Chemistry, Oxygen, Stoichiometry, Biochemical oxygen demand

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