Sewage treatment system and sewage treatment method

Abstract

The invention provides a sewage treatment system, which comprises an unwatering water tank, a low-speed decarbonizing device, a filter tank, a wastewater forebay and an industrial wastewater treatment system which are connected sequentially by using a water pipe, wherein the filter tank is connected to a clear water tank by the water pipe; the clear water tank is connected to a first-stage cooling tower and a second-stage cooling tower; the first-stage cooling tower and the second-stage cooling tower are connected to the wastewater forebay; one end of the industrial wastewater treatment system is connected to the clear water tank, and the other end of the industrial wastewater treatment system is connected to a sewage drainage tank; and a backwashing tank is connected to the wastewater forebay by the water pipe. In addition, the invention also provides a sewage treatment method using the sewage treatment system. By the method, the problem of high possibility of sewage blockage of an ultrafiltration and reverse osmosis system of the industrial wastewater treatment system caused by high salt content, hardness, alkalinity and content of organic matters and silicon of sewage of the industrial wastewater treatment system in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a sewage treatment system and method. Background technique [0002] The water source of the industrial wastewater treatment system of the existing power generation company is mainly the circulating water sewage and the first-stage reverse osmosis concentrated drainage, and the incoming water contains high salinity, hardness, alkalinity, organic matter, and silicon. The multimedia filter and disk filter before ultrafiltration are not ideal for removing organic matter and silicon, and the high hardness and alkalinity increase the risk of fouling in membrane treatment, thus causing fouling in the operation of ultrafiltration and reverse osmosis systems. blocking problem. Contents of the invention [0003] The purpose of the present invention is to provide a sewage treatment system and method, which solves the problem of ultrafiltration in the industrial wastewater treatmen...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a sewage treatment system and method, which solves the problem of ultrafiltration in the industrial wastewater treatment system caused by the high content of salt, hardness, alkalinity, organic matter, and silicon in the incoming water of the industrial wastewater treatment system in the prior art. and fouling problems that are prone to occur in reverse osmosis systems

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