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Garbage leachate treatment technique

A landfill leachate and treatment process technology, applied in the field of sewage treatment process, can solve the problems of reduced biodegradability, infeasibility, difficulty in meeting discharge standards, etc., and achieve the effect of stable effluent quality

Active Publication Date: 2012-01-25
UNIVERSTAR SCI & TECH SHENZHEN
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Problems solved by technology

With the operation of the landfill, the landfilled waste is gradually fermented and matured, the biodegradable substances are consumed in large quantities, the COD value of the landfill leachate decreases, and the biodegradability also decreases, which weakens the applicability of biochemical treatment. not even feasible
Therefore, it is difficult to meet the emission standards with a simple biochemical treatment process.

Method used

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  • Garbage leachate treatment technique
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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0016] A landfill leachate treatment process adopts the following steps:

[0017] (1) The landfill leachate is homogenized and the water volume is adjusted through the regulating tank;

[0018] (2) Add flocculant to the landfill leachate in the pipeline between the adjustment tank and the coagulation sedimentation tank, and then the leachate enters the coagulation sedimentation tank to remove most of SS and part of COD;

[0019] (3) The landfill leachate after precipitation enters the alkali-adding reaction tank, and makes the pH to 11.5-12 by adding lime milk solution;

[0020] (4) After the landfill leachate is adjusted to a pH of 11.5-12, it enters the ammonia stripping tower to remove high-concentration ammonia nitrogen to meet subsequent biochemical needs;

[0021] (5) After the ammonia is blown off, the landfill l...

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Abstract

The invention discloses a garbage leachate treatment technique, comprising: homogenizing the water quality of garbage leachate by an adjusting tank, and then leading the garbage leachate to enter a coagulative precipitation tank; then, alkalifying and deaminizing, and lifting into a UASB+AF tank through pump; after that, removing a great deal of organic matter, and leading the effluent to enter apacked A / O tank together with the sewage processed by the original sewage plant; removing the organic matter and the ammonia nitrogen which are difficult to degrade, and then passing through a secondary sedimentation tank and entering an advanced oxidation system for deep oxidation; leading the effluent to enter a biological aerated filter, processing by a sand filtering system and then entering a membrane processing system; and finally, ensuring the water quality of the effluent to be stable and reach the standard. As the garbage leachate treatment technique adopts the technology of 'biochemistry+ physical chemistry+ membrane separation' to treat the leachate, the effluent can reach the first grade discharge standard (GB16889-1997).

Description

technical field [0001] The invention relates to a sewage treatment process, in particular to a process for treating landfill leachate with the technology of "biochemical + physical chemical + membrane separation". Background technique [0002] Landfill leachate is a secondary pollutant produced in the waste treatment process, and it is already the most important pollution source of groundwater. The main sources of landfill leachate are the water contained in the waste itself, the water produced by the biochemical reaction of waste, the infiltration of surface water, the reverse osmosis of underground diving, and atmospheric precipitation. Due to the source of the leachate, the water quality of the leachate has different characteristics from urban sewage: complex water quality, high concentration of organic matter, high metal content, large water quality changes, high ammonia nitrogen content, and imbalance of nutrient elements (mainly C, N, P out of proportion). [0003] A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/20C02F1/44C02F3/30C02F9/14C02F1/52C02F1/78C02F1/66
Inventor 王韶锋文秋红石文军
Owner UNIVERSTAR SCI & TECH SHENZHEN
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