Treatment method for aged landfill leachate

A technology for landfill leachate and a treatment method, which is applied in the treatment of aging landfill leachate and wastewater treatment, can solve the problems of poor biodegradability, large changes in water quality and quantity, and pollutants such as organic matter exceeding the standard, and achieves strong resistance to shock loads. , to ensure stability, good removal effect

Active Publication Date: 2014-05-14
GARDEN ENVIRONMENTAL PROTECTION
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Problems solved by technology

[0006] 2. B/C is relatively low, and the biodegradability is poor
[0008] 3. The water quality and quantity change greatly, and the composition is complex
[0010] There are many processes for landfill leachate treatment, but due to the high concentration and complex composition of leachate, special requirements are put forward for the treatment process
Relying on a single treatment process is difficult to mee

Method used

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  • Treatment method for aged landfill leachate

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Embodiment Construction

[0035] see figure 1 , the processing method of aging landfill leachate of the present invention comprises following specific operations:

[0036] (1) Pretreatment: The aging landfill leachate is poured into the regulating tank to adjust the water quality, water volume and B / C ratio, and the hydraulic retention time in the regulating tank is 90-150d; the effluent from the regulating tank enters the hydrolysis and acidification tank for Hydrolytic acidification;

[0037] (2) Biochemical treatment: the leachate after hydrolysis and acidification flows into the primary A / O from the hydrolysis and acidification tank 2 The denitrification / carbon oxidation / nitrification reaction is carried out in the reaction tank to remove organic matter and ammonia nitrogen in the leachate, and the primary A / O 2 The hydraulic retention time in the reaction tank is 7d; the first-level A / O 2 The effluent from the reaction tank enters the secondary A / O reaction tank for denitrification / nitrificatio...

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Abstract

The invention provides a treatment method for aged landfill leachate. The method specifically comprises the following steps: collecting the aged landfill leachate in an adjusting tank for adjustment, and causing the adjusted aged landfill leachate to enter a hydrolytic acidification tank for hydrolytic acidification; causing the hydrolytically-acidified leachate to flow from the hydrolytic acidification tank to a primary A/O<2> reaction tank for denitrification/carbon oxidation/nitrification reaction; causing the effluent of the primary A/O<2> reaction tank to flow into a secondary A/O reaction tank, and performing denitrification/nitrification reaction for further denitrification and decarburization; causing the effluent of the secondary A/O reaction tank to enter an ultrafiltration system for ultrafiltration; sequentially delivering permeate produced by the ultrafiltration into a nanofiltration system and a reverse osmosis system for advanced treatment; treating a concentrated solution produced by the nanofiltration system and the reverse osmosis system by adopting a concentrated solution system. According to the method, the concentration of pollutants in discharged water can be effectively reduced to ensure that the discharged water reaches standards.

Description

【Technical field】 [0001] The invention relates to wastewater treatment technology in the field of environmental protection, in particular to a treatment method for aging landfill leachate. 【Background technique】 [0002] With the acceleration of the pace of urbanization in our country, its urban waste has also increased sharply. Landfill leachate produced in the process of landfill is one of the most difficult to treat high-concentration wastewater in the current water environment, which is very harmful to human body and environment. The composition of the leachate of the landfill is constantly changing with the prolongation of the landfill time. The early leachate is generally buried for 3-5 years, and the VFA (volatile fatty acid) content is relatively high, which can account for about TOC (total organic Carbon) more than 50%, easily biodegradable. The BOD / COD (biodegradability) value is relatively high, generally between 0.4 and 0.8, and the ammonia nitrogen concentrati...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 陈新芳李泽清唐艳萍
Owner GARDEN ENVIRONMENTAL PROTECTION
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