Sewage recycling comprehensive treatment system

Abstract

The invention discloses a sewage recycling comprehensive treatment system which at least comprises a pre-precipitation filter, a biological renewable ammonium ion exchange device, a medium-low pressure reverse osmosis treatment device with an operation pressure of 1-4MPa, an anaerobic biochemical reaction device, a mixed biochemical reaction device and a post-precipitation filter which are connected in sequence. According to the sewage recycling comprehensive treatment system disclosed by the invention, multiple biochemical technologies are combined by use of an improved membrane system with a high recovery rate, and high-quality softened water is produced while removing pollutants. The problems in treating thick water and ammonia nitrogen are solved, and the pollutants such as organic matters, nitrogen, phosphorus, sulfur, magnesium and the like are recycled.

Description

technical field [0001] The invention relates to a sewage treatment device, in particular to a sewage resource comprehensive treatment system. Background technique [0002] Sewage contains pollutants represented by organic matter, nitrogen, phosphorus, heavy metals, and bacteria. These pollutants are usually removed by physical, chemical, and biological methods to reduce their impact on the water environment. [0003] The commonly used conventional reverse osmosis treatment method is currently only suitable for the treatment of reclaimed water above the third level with low organic matter content, and can obtain a relatively high recovery rate. The designed membrane flux is usually less than half of the standard flux. While the recovery rate is high, the cleaning frequency needs to be once a month, which needs to increase the amount of membrane consumption and energy consumption. The treatment of a large amount of concentrated water with poor biochemical properties is a head...

AI Technical Summary

Problems solved by technology

[0006] Although the methods provided by the above two patents have mature engineering applications, they have not considered and proposed a treatment method for the problem of high ammonia nitrogen in the purified effluent caused by the increase in pH

And for the concentrated water in the system, although the amount of discharged water is reduced by increasing the recovery rate, the treatment methods are limited. The deep well injection produces secondary liquid pollution, and the evaporation crystallization only transfers the pollutants from the liquid to the solid waste. failed to solve the problem fundamentally

Images