Large circulation garbage percolate treatment process with characteristic of adaptability

Abstract

The present invention discloses a large circulation garbage percolate treatment process with a characteristic of adaptability. The process is characterized in that the following improvements are performed based on the conventional garbage percolate treatment process, wherein the improvements comprise that: an ultra-filtration effluent reflux system is added, and comprises four parts such as reflux of ultra-filtration effluent to an adjustment tank, reflux of ultra-filtration effluent to an anaerobic tank, reflux of ultra-filtration effluent to a denitrification tank and reflux of ultra-filtration effluent to a nitrification tank, two parts such as reflux of ultra-filtration concentration sludge to the anaerobic tank and reflux of ultra-filtration concentration sludge to the adjustment tank are added, a pipeline transcending system is added so as to perform direct transcendence entering of the percolate raw liquid into the denitrification tank, and a fuzzy control system is additionally arranged. The process has the following beneficial effects that: self-circulations of various process segments in the system in the large range are flexibly regulated so as to effectively reduce impact on the system due to substantial organic load fluctuation, ensure long time stable operation of the system, and achieve an adaptability function of the garbage percolate treatment process; and structure sizes of various reactors can be properly reduced, capital construction investment and operating cost can be saved, foams in the nitrification tank can be effectively eliminated, and other effects are provided.

Description

technical field [0001] The invention relates to a large-cycle self-adaptive landfill leachate treatment process, which belongs to the technical field of sewage treatment. Background technique [0002] During the stacking and landfilling of garbage, a large amount of leachate wastewater will be generated. This is a high-concentration organic wastewater with a COD concentration of 30,000 to 70,000 mg / L and an ammonia nitrogen concentration of 600 to 3,000 mg / L. The composition is complex and variable, and it is difficult to treat. Moreover, the water quality and quantity of landfill leachate have certain seasonal characteristics, and the range of change is large, which has particularly high requirements on the impact load resistance of the treatment process. [0003] "Regulating tank + anaerobic + MBR + advanced treatment" is a relatively common landfill leachate treatment process. Among them, the anaerobic reactor can degrade (decompose) most of the complex organic pollutant...

AI Technical Summary

Problems solved by technology

Frequent fluctuations in organic loads can easily cause a large number of filamentous bacteria to multiply. If excessive aeration occurs when the concentration of leachate influent water quality drops a lot and the aeration rate is not reduced in time, a large amount of foam will easily be generated in the aerobic tank, which will cause rapid A large amount of overflow of the generated foam will cause environmental accidents

Therefore, the volume of the aerobic pool must be large enough, and its cost increases accordingly

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