Surface treatment wastewater reuse treatment process

Abstract

The invention discloses a surface treatment wastewater reusing treatment technology which comprises the following steps of: adding sodium hydroxide into a quickly-stirred coagulation basin to adjust the pH value to 7-8, and adding a coagulant polyaluminum chloride; adding a flocculant polyacrylamide into a slowly-stirred flocculation basin; enabling the wastewater in the coagulation basin to flow into a sedimentation basin for sedimentation; enabling the water from the sedimentation basin to directly flow into a biochemical pool to perform biochemical treatment, wherein the biochemical pool is divided into a facultative pool at the front section and an aerobic pool at the rear section; enabling the water from the aerobic tank to flow into an MBR membrane pool; through the filtration effect of the MBR membrane, separating the treated water and enabling the water to flow into a reusing water pool while leaving the microorganisms and pollutants in the MBR membrane pool; and striking the concentrated liquid in the MBR membrane pool to an inlet end of the aerobic pool by use of a reflux pump. According to the invention, the treated water can reach the reclaimed water reusing standard, and the problems of high cost of surface treatment wastewater reusing and difficult standard reaching and reusing are solved.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment of environmental engineering, and in particular relates to a recycling treatment process of surface treatment waste water. Background technique [0002] With the development of industry and the increasingly serious problem of lake eutrophication, the Taihu Lake Basin has more and more stringent requirements for wastewater discharge. For new construction projects, it is generally required that all enterprises have about 40-80% of wastewater reuse. Traditional surface treatment wastewater reuse treatment process such as figure 1 As shown, according to the treatment process, the adjustment tank, the first coagulation tank, the first flocculation tank, the sedimentation tank, the aerobic tank, the aerobic tank, the second coagulation tank, the second flocculation tank, the second sedimentation tank, and the intermediate tank , sand filter tower and reuse water pool, the traditional surf...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above defects, the present invention provides a surface treatment wastewater reuse treatment process, which mainly uses the combination process of "coagulation + sedimentation + biochemistry + MBR membrane" to treat surface treatment wastewater and reuse it. It is a surface treatment wastewater reuse treatment process that can meet the reuse standard of reclaimed water, which solves the problems of high cost of surface treatment wastewater reuse and difficulty in reaching the standard.

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