Technique for processing garbage leachate

Abstract

The invention relates to a landfill leachate treatment process, comprising: (1) adjusting the water quality and water quantity of the landfill leachate in a regulating tank; (2) sending the leachate after water quality and water quantity adjustment into an anaerobic tank, Anaerobic treatment is carried out at 25°C to 45°C, and the anaerobic treatment time is 50 to 100 hours; (3) The biogas generated during the anaerobic treatment is treated, and the sludge generated during the anaerobic reaction is discharged; (4) ) Send the leachate after the anaerobic treatment into the anoxic tank for anoxic treatment, and discharge the sludge generated in the anoxic reaction process; (5) send the leachate after the anoxic treatment into the aerobic tank for aerobic treatment (6) Send the leachate after aerobic treatment to the membrane bioprocessor for solid-liquid separation, and the sludge produced after the treatment will be processed according to the reflux ratio of 3:1 to (7) send the leachate treated by the membrane bioprocessor into an intermediate water tank; (8) perform nanofiltration membrane treatment on the leachate, and the treated effluent is directly metered and discharged or mixed with the water in the intermediate water tank (9) concentrated water after nanofiltration membrane treatment is returned to the adjustment tank.

Description

technical field [0001] The invention relates to a process for treating high-concentration organic leachate, in particular to a process for treating landfill leachate. Background technique [0002] Landfill leachate is a kind of high-concentration organic leachate, which is characterized by high concentration of pollutants and complex components. With the different landfill areas, the degree of pretreatment of each landfill is different, and the season of the same landfill is different. Different landfill landfill time will cause great differences in the quality and quantity of landfill leachate. According to the specific situation of landfill leachate water quality, the applicant can be divided into three categories (as shown in Table 1): [0003] Table 1: Landfill Leachate Water Quality Status [0004] [0005] Landfill leachate is currently recognized worldwide as a severely polluted leachate that is difficult to treat. Landfill leachate has serious environmental pol...

AI Technical Summary

Problems solved by technology

[0013] Due to the high concentration of ammonia nitrogen in landfill leachate, the general process of treating landfill leachate adopts physical and chemical treatment, such as dosing coagulation, physical stripping, etc., and the effect is not ideal.

Because domestic research on landfill leachate treatment methods has just started, the above-mentioned processes are still not very mature, and there are still various problems, and further in-depth research is needed

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