Method for applying integrated technology of combination of membrane biochemistry and nanofiltration membrane to high-density leachate advanced treatment and recycling

Abstract

The invention discloses a processing method and a processing apparatus of landfill leachate. The processing method comprises steps of pretreatment, anaerobic treatment, membrane biochemical treatment, nanofiltration treatment, and sludge treatment and the like. And the processing apparatus includes a primary settling tank (1) and a regulating tank (2). The regulating tank (2) is connected with an anaerobic reactor (3) which is connected with a denitrifying tank (4); the denitrifying tank (4) is communicated with a nitration tank (5), which is connected with ultrafiltration equipment (6); and the ultrafiltration equipment (6) is connected with nanofiltration equipment (7). According to the invention, COD of the high-density wastewater is degraded. After processing, high-density COD of 50,000 to 60,000mg / L is degraded to COD of about 50 mg / L, which reaches the standard of industrial reused water. Moreover, zero discharge of leachate is realized. Therefore, a new attempt to treat the high-density leachate is initiated and the domestic blank is filled.

Description

technical field [0001] The invention relates to a method for treating landfill leachate in a waste power plant and a treatment device for landfill leachate. Background technique [0002] With the development of social economy and the improvement of residents' living standards, the output of urban garbage is increasing day by day, and the disposal of urban garbage has become a major problem in modern cities. Currently, waste disposal methods are mainly incineration and landfill. No matter which treatment method is adopted, landfill leachate will be generated. [0003] Waste incineration power generation is a new urban waste disposal method in recent years. Before incinerating domestic waste, the waste incineration plant must store fresh waste in the waste storage pit for 3 to 5 days for fermentation and aging, so as to achieve the purpose of leaching out water and increasing the calorific value, so as to ensure the normal operation of the subsequent incinerator. The leacha...

AI Technical Summary

Problems solved by technology

If not handled properly, landfill leachate will cause serious pollution to the environment

Moreover, because the water quality and water volume of landfill leachate vary greatly, it brings difficulties to the selection and operation of the treatment process, and it is a kind of wastewater that is difficult to treat.

[0005] For leachate, which is highly concentrated, highly toxic, high ammonia nitrogen, and high salt content, it is difficult to guarantee its stable and effective treatment effect, especially for incineration plant wastewater, which has a very high SS content. At the same time, the quality of the water The amount of change is very large, and the conventional anaerobic and nitrification and denitrification processes cannot adapt to such an impact load, which also makes its operation unstable and effective. At the same time, the treatment effect of the anaerobic reactor and the loss of sludge and the secondary sedimentation tank Low separation efficiency will seriously affect the quality of effluent water

Images