Method for treating refuse leachate membrane-concentrated liquid by using ozone advanced oxidation

Abstract

The invention relates to a method for treating refuse leachate membrane-concentrated liquid by using ozone advanced oxidation. Refuse leachate membrane-concentrated liquid is fully mixed with metal salt like inorganic macromolecular flocculant and polyacrylamide, then the mixture is delivered to a gas floatation clarifier for performing mud-water separation, the PH value of clear liquid obtained after the separation is regulated, and then the clear liquid is drained into a settling pond for performing settlement treatment; supernatant of the settling pond is delivered to an ozone catalytic oxidation reaction device; wastewater obtained after ozone catalytic oxidation is delivered to an advanced oxidation device for performing advanced oxidation; the wastewater obtained after the advanced oxidation is delivered to denitrification equipment for performing denitrification treatment; the wastewater obtained after denitrification treatment can reach a discharge standard. The method for treating refuse leachate membrane-concentrated liquid by using ozone advanced oxidation has the characteristics of simple process line, high treatment cost performance and no secondary pollution.

Description

technical field [0001] The invention relates to a method for treating landfill leachate membrane concentrate by advanced ozone oxidation, and belongs to the technical field of high-concentration refractory organic wastewater treatment. Background technique [0002] The leachate produced during the landfill process of municipal solid waste has the characteristics of high concentration of organic pollutants, high concentration of ammonia nitrogen, high concentration of heavy metal ions, etc., and it is very difficult to treat. At home and abroad, there are traditional biological methods, membrane separation and combination methods for the treatment of landfill leachate, among which membrane biochemical reactor and disk tube reverse osmosis are currently the mainstream treatment processes. In order to meet the special limit discharge requirements in the new GB16889-2008 standard, the leachate treatment process usually adopts the "biochemical + membrane" process, and nanofiltrat...

AI Technical Summary

Problems solved by technology

After the leachate membrane concentrate is returned to the adjustment tank, with the increase of the landfill leachate membrane concentrate, the membrane pressure of the treatment system will increase, which will cause the treatment quality of the treatment system to decline, and even cause the treatment system to collapse

The recharge method landfill requires less leachate production and can only be used in small waste disposal sites. However, due to the accumulation of salt and the increase in conductivity, the recharge landfill will deteriorate the treatment system, so its use is limited. sex

The combination of coagulation sedimentation, resin adsorption, and activated carbon adsorption requires a large dosage of chemicals, resulting in a large amount of sludge, and the treatment cost is very expensive.

Both the evaporation method and the incineration method have complex equipment, high energy consumption, high operating costs, and secondary pollution, and the treatment effect is not good.

Images