Reverse osmosis concentrated water treatment method

Abstract

The invention discloses a reverse osmosis concentrated water treatment method which comprises the following steps: (1) adding a precipitator and an oxidizing agent into reverse osmosis concentrated water, filtering to obtain a clear liquid, and adding a catalyst used for water treatment into the clear liquid to implement catalytic oxidation to obtain primary treatment water, wherein the acquisition of the primary treatment water further preferentially comprises adsorbing a liquid subjected to catalytic oxidation; (2) performing reverse osmosis treatment on the primary treatment water to obtain secondary reverse osmosis water and secondary reverse osmosis concentrated water; (3) adding the oxidizing agent into the secondary reverse osmosis concentrated water for oxidation to obtain an effluent, wherein the effluent is used for direct discharge, and the acquisition of the effluent further preferentially comprises adsorbing a liquid subjected to oxidation. According to the reverse osmosis concentrated water treatment method, 75-85wt% of water is recycled, the overall use ratio of the water is improved, meanwhile, a small part of water left is treated to reach the discharge standard, the economic input is low, and the method is simple and is easy to operate.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment in environmental engineering, and more specifically relates to a treatment method for concentrated reverse osmosis water. Background technique [0002] In recent years, with the rapid development of the petrochemical industry, the shortage of water resources has become an important factor restricting my country's economic and social development, so the utilization of water resources has received more and more attention. Reverse osmosis can not only effectively remove inorganic salt ions in water, but also remove impurities such as colloids, bacteria, viruses, bacterial endotoxins and most organic substances in water, and has high system stability and low operating costs, so it has become a reclaimed water reuse technology. main technical means. However, after the reverse osmosis treatment, in addition to the reused water, reverse osmosis concentrated water (compared to the reclaimed...

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Problems solved by technology

However, after the reverse osmosis treatment, in addition to obtaining reused water, reverse osmosis concentrated water concentrated 3-5 times (relative to the reclaimed water before reverse osmosis) will be produced. The reverse osmosis concentrated water produced has the following defects: High content of sexual organic matter, large solution chroma, high salt content, poor biodegradability

In summary, the bottleneck of the popularization and application of reverse osmosis concentrated water near-zero discharge process lies in the treatment of high-salt and difficult-to-treat concentrated water obtained after desalination, so it is necessary to develop an efficient and economical reverse osmosis concentrated water near-zero discharge process

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