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Modification for the Printing and Dyeing Wastewater Treatment Process

Yong‐Hui Wang

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Abstract

By making analysis on the problems existing in the printing and dyeing wastewater treatment in a banner and tent factory, the modified hydrolytic acidification/contact oxidation/coagulation and air-flotation process was presented. The running result shows that the removal rate of COD, BOD_5, SS, and color is 93%, 97%, 91%, and 90% respectively; and the effluent quality comes up to the II-class criteria specified in the Local Wastewater Discharge Standard in Shanghai (DB 31/199—1997), and part of effluent is reused.

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What this paper is about

By making analysis on the problems existing in the printing and dyeing wastewater treatment in a banner and tent factory, the modified hydrolytic acidification/contact oxidation/coagulation and air-flotation process was presented. The running result shows that the removal rate of COD, BOD_5, SS, and color is 93%, 97%, 91%, and 90% respectively; and the effluent quality comes up to the II-class criteria specified in the Local Wastewater Discharge Standard in Shanghai (DB 31/199—1997), and part of effluent is reused.

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Available abstract

By making analysis on the problems existing in the printing and dyeing wastewater treatment in a banner and tent factory, the modified hydrolytic acidification/contact oxidation/coagulation and air-flotation process was presented. The running result shows that the removal rate of COD, BOD_5, SS, and color is 93%, 97%, 91%, and 90% respectively; and the effluent quality comes up to the II-class criteria specified in the Local Wastewater Discharge Standard in Shanghai (DB 31/199—1997), and part of effluent is reused.

Key concepts: Effluent, Dyeing, Wastewater, Oxidation process, Waste management, Environmental science, Factory (object-oriented programming), Pulp and paper industry

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