Complete plant for treating and recovering printing light polluted waste liquid

Abstract

A complete set of equipment used for printing and dyeing light polluted wastewater treatment and reuse belongs to the manufacturing technical filed of printing and dyeing wastewater treatment and reuse equipment and is mainly composed of a workshop wastewater collecting tank (1), an automatic diversion pipe (2), a screen (3), an adjusting pool (4) with a diving mixer (5) and a lift pump (6) arranged inside, a moving bed bioreactor (7), a precipitation-separation tank (10) with a sludge discharge bucket (11) at the bottom, a middle water pool (12), a secondary lift pump (15), a backwashing self-cleaning filter (16), a reuse water pool (17), a reuse lift pump (18) and an automatic reuse system (19); a dosing device (13) and a dosing pump (14) are arranged between the secondary lift pump (15) and the backwashing self-cleaning filter (16). The complete set of equipment disclosed in the invention has rational design, compact overall structure and good treatment effect, and saves energy sources, which can ensure stable water quality indexes of the reuse water after treatment to achieve the purpose of wastewater reuse, and can meet the production requirements of enterprises.

Description

technical field [0001] The invention relates to a complete set of equipment for the treatment and reuse of lightly polluted printing and dyeing wastewater, which belongs to the technical field of manufacturing of printing and dyeing wastewater treatment and recycling equipment. Background technique [0002] The printing and dyeing industry is a large player in the industrial drainage industry. The amount of wastewater discharged is large, the content of organic pollutants is high, the color is deep, the alkalinity is high, and the biodegradability is poor. It is one of the industrial wastewater that is difficult to treat. In recent years, with the development of new chemical fibers, imitation silk, and printing and dyeing finishing technologies, a large number of refractory organic substances such as polyvinyl alcohol new additives have entered wastewater, which has increased the difficulty of wastewater treatment and reduced the removal efficiency of the original biological ...

AI Technical Summary

Problems solved by technology

This scheme is a typical combination of various treatment methods. The disadvantage is that the operation cost is relatively high, and it is difficult to promote in areas with sufficient water sources.

The advantage of advanced treatment of printing and dyeing wastewater by electrochemical method combined with chemical flocculation and ion exchange method is that the effluent quality is good and can be reused in all dyeing processes. The disadvantage is that the process is sensitive to pH value. Ion concentration and conductivity, this scheme is highly dependent on ion exchange resin, so the frequency of ion regeneration is inevitable

The iron-carbon filtration system uses scrap iron chips whose main components are iron and carbon. After pretreatment and activation, it can be used as filler. The advantage of this process is to treat waste with waste, and the operation is stable. The disadvantage is that the pH value must be adjusted back and forth.

The process is easy to operate, especially effective in removing chroma, but the cost of this process is high, and the factory must have a certain scale of printing and dyeing wastewater treatment process, and the influent of this treatment process has been discharged up to the standard, which has certain limitations sex

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