Reverse osmosis concentrated water oxidizing and desalting method and system of organic wastewater

Abstract

The invention provides a reverse osmosis concentrated water oxidizing and desalting method and system of organic wastewater. The method comprises the following steps: S1, performing primary reverse osmosis treatment on the organic wastewater to obtain primary reverse osmosis wastewater; S2, performing an oxidizing reaction on the primary reverse osmosis wastewater under the action of an oxidant to obtain oxidized wastewater; S3, softening the oxidized wastewater under the action of a softener to obtain softened wastewater; S4, coagulating the softened wastewater under the action of a coagulant and a coagulant aid; S5, precipitating a product in the S4 to obtain supernatant wastewater; S6, performing a neutralizing reaction on the supernatant wastewater; S7, performing multimedia filtration on the wastewater neutralized in the S6 to obtain primary filtered wastewater; S8, ultra-filtering the primary filtered wastewater to obtain secondary filtered wastewater; and S9, performing secondary reverse osmosis on the secondary filtered wastewater to obtain secondary concentrated water and reclaimed water.

Description

technical field [0001] The invention belongs to the technical field of waste water recycling and treatment, and relates to a method and system for oxidation and desalination of organic waste water reverse osmosis concentrated water. Background technique [0002] my country's per capita water resources are about 2,000 cubic meters, which is a moderate water shortage level according to international standards. In addition, due to the differences in regions and schedules of water resource distribution in my country, about two-thirds of the country's 600 cities are "severely water-deficient" or "water-deficient" cities. Among them, 16 provinces are in moderate water shortage level, and 6 provinces are in extreme water shortage level. However, restricted by people's awareness of environmental protection and water treatment facilities, a large amount of untreated or substandard treated wastewater enters rivers and lakes, posing a huge threat to the water environment. The shortag...

AI Technical Summary

Problems solved by technology

The main problem of the "ultrafiltration + reverse osmosis" double-membrane process is that the water production rate of the reverse osmosis membrane technology is generally less than 75%, and about 30% of the concentrated water is produced.

However, this reverse osmosis concentrated water treatment method uses electrochemical flocculation, electrocatalytic redox, electric floatation, high-efficiency precipitation and multimedia filtration processes to pretreat reverse osmosis concentrated wat...

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