Method of treating discharged sewage of circulating water plant through precoated membrane filtration technology

Abstract

The invention discloses a method of treating discharged sewage of a circulating water plant through a precoated membrane filtration technology. The method comprises the specific processes that (1) anagent-adding coagulation air floatation unit pretreats wastewater; and (2) a precoated membrane filtration unit performs deep treatment on air floatation produced water, wherein the precoated membranefiltration unit adopts the operation process of "backwashing membrane explosion-membrane coating-filtration", a 316L stainless steel powder sinteredporous inert membrane tube is adopted as a membranebase, and dead end filtration is performed. According to the method, the treatment effect of the discharged sewage, which contains oil and high-viscosity sludge, of the circulating water plant of a petrochemical enterprise is good, the oil content and suspended matter content in effluent are greatly lowered, and the treated sewage can be reused as circulating water or enter a conventional biochemical treatment system for treatment.

Description

technical field [0001] The invention relates to a treatment method for sewage with high pollution load discharged from a circulating water plant, in particular to a method for treating sewage discharged from a circulating water plant by pre-coating membrane filtration technology. Background technique [0002] Circulating cooling water is a large industrial water user, especially in the domestic petroleum and petrochemical industry. Due to the many processes involved, there are inevitably problems such as leakage, which makes the circulating water seriously polluted. It is difficult to achieve stable operation of the system through a small amount of supplementation. There are often large The phenomenon of exhaustion and supplementation. At present, the circulating water system mainly solves the problems of corrosion, scaling and microbial reproduction caused by continuous evaporation and concentration of water in the system by regularly adding corrosion and scale inhibitors, ...

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