Combined technique for garbage filter liquor treatment

Abstract

A combination technique of garbage treatment for percolating liquid contains the process of facultative-aerobic biochemical treatment and anti-penetration treatment. The invention is characterized in that: the anti-penetration treatment is arranged before the facultative-aerobic biochemical treatment. The process can also contain deamination treatment which is arranged after the anti-penetration treatment. Compared with the prior arts, the invention of the combination technique of garbage treatment for percolating liquid sets the anti-penetration treatment before the biochemical treatment, which enables most of the pollution material in the percolating liquid to be trapped in advance, directly through the anti-penetration system and solves the problem of biodegradability of garbage percolating liquid changing with age and has small occupying space. The technique sets the deamination treatment after the anti-penetration treatment to achieve high ammonia-nitrogen removal rate: 90-95 percent and puts the facultative-aerobic biochemical technique thereafter, which can greatly reduce the occupying space. The invention relates to the garbage treatment for percolating liquid and has the advantages of technical reliability, economy and strong applicability.

Description

technical field [0001] The invention relates to a process for treating waste liquid, in particular to a combined process for treating landfill leachate. Background technique [0002] Leachate is the product of gravity flow of liquid in a landfill, mainly from precipitation and the embedded water of the waste itself. Since many factors may affect the properties of the leachate during the flow of the liquid, including physical factors, chemical factors and biological factors, the properties of the leachate vary within a considerable range. Generally speaking, its PH value is between 4-9, COD is in the range of 2000-62000mg / L, BOD is from 60-45000mg / L, and it also contains a variety of high concentrations of heavy metals, salts and polysaccharides. pathogenic microorganisms. [0003] Municipal landfill leachate is a high-concentration organic wastewater with complex components, and its composition and properties change with the "age" of landfill, mainly in: (1) The compositio...

AI Technical Summary

Problems solved by technology

For example, Guangzhou Xinfeng leachate treatment plant adopts UASB (upflow anaerobic sludge bed reactor) + SBR (sequenced batch activated sludge process) + reverse osmosis treatment process, but this method also has shortcomings: one is Directly entering the UASB treatment system without considering the high ammonia nitrogen characteristics of the waste water will cause the system to run abnormally; secondly, because the BOD / COD ratio of landfill infiltration changes with the "age" of the landfill, the BOD / COD ratio in the later stage of the landfill will Even less than 0.1, UASB and SBR should be designed according to this value, resulting in an excessively large footprint

Third, the investment and treatment costs per ton of water are too high (the treatment scale is 500m 3 / d, the project investment is about 60 million yuan, and the processing cost is about 25 yuan / m 3 )

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