System and method for advanced treatment of industrial sewage

Abstract

The invention discloses a system and method for advanced treatment of industrial sewage. The system comprises a charcoal preparation pool, a stirring pool, a blower, a primary charcoal water separator, a buffer pool, a secondary charcoal water separator, a filter-press device, a charcoal regeneration device, a soaking device and a roasting device. Tail water of an industrial sewage treatment plant is sent into the stirring pool to be fully mixed with powdered activated carbon; charcoal water of the stirring pool flows back to the primary charcoal water separator; part of charcoal pulp separated out of the primary charcoal water separator flows back to the stirring pool, another part of the charcoal pulp is discharged to the filter-press device to be dehydrated and then sent into the charcoal regeneration device and the charcoal preparation pool, and separated water is sent into the buffer pool; original charcoal and soaking liquid are fully mixed and soaked, and are dried and roasted in the roasting device and then sent into the charcoal preparation pool; water in the buffer pool and powdered activated carbon water in the charcoal preparation pool are sent into the secondary charcoal water separator, separated water meets the standard and is discharged, and the separated charcoal pulp flows back to the stirring pool. According to the system and method for advanced treatment of industrial sewage, the charcoal utilization rate is high, the charcoal use quantity and treatment cost are reduced, the sewage is treated in a staged mode, and the system and the method adapts to water inlet concentration changes better.

Description

technical field [0001] The invention belongs to the technical field of environmental protection technology and relates to an industrial sewage treatment system and method, in particular to a system and method for advanced treatment of industrial sewage by powdered activated carbon loaded with metal catalysts. Background technique [0002] Industrial sewage has the characteristics of deep color, high COD concentration, and refractory degradation. It is still difficult to discharge industrial sewage up to standard after being treated by conventional biochemical and chemical precipitation methods, and it needs to be further treated by advanced treatment technology. However, the tail water discharged from industrial sewage treatment plants with conventional secondary biochemical and chemical precipitation treatment usually has characteristics such as difficult biochemical, difficult oxidation, and difficult flocculation, and traditional methods are difficult to achieve. Advance...

AI Technical Summary

Problems solved by technology

At present, the conventional primary carbon-water separation technology includes air flotation method and sedimentation method. Although both methods can achieve good carbon-water separation effect, due to the different particle sizes and particle specific gravity of powdered carbon, the total amount of water in the treated water is different. There is a small amount of residual powdered carbon, which is difficult to achieve the purpose of separation through primary separation; in addition, only through primary separation, the utilization rate of powdered carbon is not high, and the carbon consumption is large

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