Advanced treatment process and apparatus for reverse osmosis concentrated water

Abstract

The invention relates to a technology and a device for the advanced processing of reverse osmosis condensed water, wherein the technology is as follows: reverse osmosis condensed water which is directly outputted and discharged is inputted into a processor with inside-arranged biological active carbon, then ozone of the reverse osmosis condensed water, which has the density of 5 mg / L to 50 mg / l, is added on the aeration grid part of the processor; the ozone reacts with hydroxide free radicals to form oxyhydrogen free radicals of strong oxidbility in the processor; the hydroxide free radicals are used for oxidizing and decomposing organic polluting substances in the reverse osmosis condensed water, and the reverse osmosis condensed water processed by the ozone is directly outputted from the processor. The device comprises a base, a filtration cylinder and a reverse washer, wherein active carbon is put in the filtration cylinder. The hydroxide free radicals of strong oxidbility generated by the reaction of the ozone and the hydroxide free radicals are used as an oxidization middle product for oxidizing the organic polluting substances which can not be degraded in the reverse osmosis condensed water to form the organic substances which can be conveniently absorbed by the active carbon and biologically degraded, and COD value is lowered.

Description

technical field [0001] The invention relates to a process and a device for further advanced treatment of reverse osmosis concentrated water. Background technique [0002] For general wastewater treatment systems, conventional biochemical methods are often used to pretreat wastewater. After biochemical treatment of wastewater, easily degradable organic pollutants have been biodegraded, while the pollutants remaining in water are often not easy to Biodegradable or non-biodegradable organic pollutants, which can be detected by Chemical Oxygen Demand (COD). The so-called chemical oxygen demand (COD) is the amount of oxidant consumed when a certain strong oxidant is used to treat water samples under certain conditions, and it is an index indicating the amount of reducing substances in water. Reducing substances in water include various organic matter, nitrite, sulfide, ferrous salt, etc. But it is mainly various organic substances, that is, most carbon-containing compounds and ...

AI Technical Summary

Problems solved by technology

[0003] In order to reduce the COD index, in recent years, with the improvement of the quality of the reverse osmosis membrane and the continuous reduction of the price, the reverse osmosis technology has been more and more widely used in the process of wastewater reuse and water advanced treatment, but it must be noted that , reverse osmosis technology cannot eliminate or degrade organic pollutants in water, it just transfers and concentrates organic pollutants in raw water, thus forming reverse osmosis concentrated water

The current treatment methods for reverse osmosis concentrated water are deep well injection, sprinkler irrigation, or discharge into the ocean or tidal water, but these treatment methods all have the problem of polluting soil and seawater, and the cost of treatment is relatively high.

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