Treatment method of high-concentration wastewater

Abstract

The invention relates to a treatment method of high-concentration wastewater. The treatment method comprises the following steps: (1) pretreatment; (2) flocculent sedimentation treatment; (3) biochemical treatment; (4) membrane biological reaction treatment; (5) adsorption treatment; (6) oxidation treatment; (7) filtration treatment; (8) membrane treatment; (9) disinfection treatment; and (10) evaporative crystallization treatment. The method disclosed by the invention has the advantages that the wastewater with the COD (Chemical Oxygen Demand) concentration up to 96000mg / L can be treated and the COD removing rate is up to 99.98% to ensure that the treated wastewater meets the standards of drinking water and an unexpected technical effect is brought; compared with a dozen or dozens of hours in the prior art, the aerobic reaction time and the anaerobic reaction time are greatly shortened and the treatment efficiency is obviously increased; and the concentrated solution finally generated in the method only accounts for below 2% of water inflow, which is greatly reduced compared with the prior art, so that the waste of water is obviously reduced and the treatment cost is saved.

Description

technical field [0001] The invention relates to the field of sewage treatment, and is especially suitable for the treatment of high-concentration wastewater. Background technique [0002] High-concentration organic sewage refers to the high concentration of organic matter, which is characterized by high COD in chemical aspects. COD is generally above 2000mg / L, mainly including landfill leachate, hospital sewage, sewage from traditional Chinese medicine factories, etc. Landfill leachate is used as Representative of high-concentration organic sewage, the most difficult to deal with. [0003] Landfill leachate refers to the moisture contained in the garbage itself in the landfill, the rain and snow water and other moisture entering the landfill, deducting the saturated water holding capacity of the garbage and the covering soil, and passing through the garbage layer and the covering soil. A high concentration. The properties of landfill leachate depend on factors such as wast...

AI Technical Summary

Problems solved by technology

Although this treatment method is simple in structure and convenient in operation, it has the following disadvantages: first, the filtered organic sewage enters the sedimentation tank, and after sedimentation, a large amount of sludge is generated in the sedimentation tank, which increases the cost of sludge treatment alone; in addition, The treatment method of filtration + precipitation combination has low ability to deal with pollutants. The output liquid after filtration and precipitation still contains a large amount of pollutants and colloids. Reduced efficiency

However, this treatment method also has shortcomings. For example, for higher concentrations of organic sewage, the treatment of pollutants is still not complete, and it cannot meet the discharge standards, and it is even more difficult to meet the reuse standards.