A/O forward osmosis treatment system and treatment process for black and odorous water

Abstract

The invention discloses an A/O forward osmosis treatment system and a treatment process for black and odorous water. The system comprises a black and odorous water suspended matter removal device, an organic matter treatment device, a forward osmosis device, and a multistage flash evaporator connected with a water outlet in a supporting layer side of the forward osmosis device. A water inlet of the organic matter treatment device is connected with a water outlet of the suspended matter removal device; a water outlet of the organic matter treatment device is connected with a water inlet in an active layer side of the forward osmosis device; a water outlet in the active layer of the forward osmosis device is connected with a water inlet of a sedimentation basin; and a concentrated water outlet of the multistage flash evaporator is connected with a water inlet in the supporting layer side of the forward osmosis device. According to the A/O forward osmosis treatment system and the treatment process for the black and odorous water provided by the invention, a forward osmosis technology and an A/O process are combined for co-treating the black and odorous water, so that organic matters and nitrogen substances of the waste water are efficiently removed, the membrane pollution is less, a concentrated raw material solution subjected to osmosis treatment is added with a phosphate removing agent so as to be treated and then discharged into a recovery device, and the impact of the discharge of the concentrated water on the environment is avoided.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an A / O forward osmosis treatment system and treatment process for black and odorous water. Background technique [0002] The black and odor problem of urban water bodies is mainly caused by the metabolism of algae and bacteria in water bodies and the excessive discharge of pollutants into water bodies by humans. In recent years, with the rapid development of my country's urban economy, the increasing scale of cities, the lack of urban environmental infrastructure, the continuous increase of urban sewage discharge, a large number of pollutants into the river, chemical oxygen demand (COD), nitrogen ( The concentration of N), phosphorus (P) and other pollutants exceeds the standard, and the water body of the river is seriously polluted, and the water body appears black and smelly seasonally or all the year round. The ecosystem structure of urban black and odorou...

AI Technical Summary

Problems solved by technology

The direct dosing method directly sprays chemicals into the water body, which has the advantages of quick results and low investment, but also has the disadvantages of short duration and high operating costs. form secondary pollution

The comprehensive treatment effect, effluent stability and continuity of the dosing and sedimentation filtration method are better than the direct dosing method, especially the application of ultra-magnetic technology, which greatly reduces the operating cost and has a certain application prospect. The disadvantage is that, The treatment effect mainly lies in the r

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