Zero-emission integrated process for treatment and reuse of high-salinity wastewater

Abstract

The invention discloses a zero-emission integrated process for treatment and reuse of high-salinity wastewater. The invention relates to a softening desalination treatment technology of water and particularly relates to a reuse treatment system for reverse osmosis concentrated water containing low-concentration organic matters which can achieve the requirement of 'zero emission'. The integrated process comprises the following steps: (1) firstly softening and pre-treating the high-salinity wastewater; (2) acquiring pre-treated water by virtue of activated carbon adsorption and an ultrafiltration device; (3) acquiring nanofiltration softened water and nanofiltration concentrated water by virtue of a nanofiltration device; (4) acquiring reverse osmosis softened water and reverse osmosis concentrated water by virtue of a reverse osmosis device; (5) acquiring electrodialysis softened water and electrodialysis concentrated water by virtue of an electrodialysis device; and (6) carrying out evaporation crystallization treatment on the electrodialysis concentrated water by virtue of an evaporation-crystallization device, regularly outwards transporting salts generated by the evaporation crystallization, feeding generated salt into a water-producing tank to enter a reuse system and finally completing the treatment and reuse of high-salinity wastewater. The integrated process is mainly used for the integrated treatment of the high-salinity wastewater.

Description

technical field [0001] The invention relates to water softening and desalination treatment technology, in particular to a reverse osmosis concentrated water reuse treatment system containing low-concentration organic matter, which meets the requirement of "zero discharge". Background technique [0002] With the continuous development of membrane technology research and manufacturing industry, reverse osmosis technology is widely used in seawater and brackish water desalination, pure water and ultrapure water, food processing, urban water supply and industrial water, advanced treatment of industrial wastewater and urban sewage, etc. All have been widely used, and the application prospect of reverse osmosis technology in the field of water treatment in the future is extremely broad. While reverse osmosis technology produces clear water, it also produces concentrated water. Concentrated water contains low concentrations of organic matter, and people are paying more and more att...

AI Technical Summary

Problems solved by technology

Under normal circumstances, the recovery rate of the reverse osmosis system is in the range of 75% to 80%, and 20% to 25% of the reverse osmosis concentrated water is directly discharged as wastewater, which not only causes waste of water resources, but also increases environmental pollution.

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