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Energy-saving method for processing leachate of middle-aged or old refuse landfill

A technology for a landfill and a treatment method, applied in the field of landfill leachate wastewater treatment, can solve the problems of refractory ammonia nitrogen degradation and difficult removal of COD, and achieve high treatment efficiency, reduced operating costs, denitrification rate and COD removal rate. improved effect

Inactive Publication Date: 2008-06-11
UNIV OF SCI & TECH LIAONING
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Problems solved by technology

This method greatly reduces the infrastructure investment and operating costs of wastewater treatment, improves the nitrogen removal rate, and solves the problems of difficult degradation of ammonia nitrogen and difficult removal of COD in the treatment of middle-aged and elderly landfill leachate

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  • Energy-saving method for processing leachate of middle-aged or old refuse landfill

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Embodiment Construction

[0007] A new process for energy-saving middle-aged and elderly landfill leachate treatment, which includes primary biochemical treatment, primary physical and chemical treatment, secondary biochemical treatment, and secondary physical and chemical treatment.

[0008] In the primary biochemical treatment stage, the anaerobic hydrolytic acidification tank controls the wastewater in the hydrolytic acidification stage and completely converts Kjeldahl nitrogen into ammonia nitrogen. The temperature in the anaerobic hydrolytic acidification biological reaction tank is controlled at 20-30 °C, and the pH value is 7.5-9. The DO is controlled at figure 1 Filler film as shown or as figure 2 The suspended sludge shown operates in two ways.

[0009] The pH value of the wastewater needs to be adjusted to 1-2.5 before the first-level physicochemical process, the mass ratio of iron to carbon in the reactor is 1:1, the hydraulic retention time of the wastewater in the reactor is 0.5-1 hour, a...

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Abstract

The invention discloses an energy-saving treatment method for middle-aged and elderly stage refuse landfill leachate, which comprises a first-stage biochemical treatment, a first-stage physicochemical treatment, a second-stage biochemical treatment and a second-stage physicochemical treatment. The first-stage biochemical treatment stage includes anaerobic hydrolytic-acidification reaction and aerobic short-cut nitrifying reaction, further a micro-electrolysis reactor is employed to replace traditional anaerobic denitrification technique to process the first-stage physicochemical treatment and then two-stage aerobic treatment is processed, nitrite and organic pollutants discharged by the micro-electrolysis reactor are further processed, finally in the stage of the second-stage physicochemical treatment, Fention reagent is employed to subsequently process the discharged water, and the water is enabled to reach standards. The method makes full use of water quality of raw water, carbon source and acid-base neutralization agent need not be added, ammonia nitrogen is enabled to be transformed to nitrosification stage, and the additional medicament consumption is saved. And cheap scrap iron is employed as stuffing of the reactor to largely reduce capital investment and operation cost of wastewater treatment, increasing the denitrification rate.

Description

technical field [0001] The invention relates to a method for treating landfill leachate wastewater, in particular to an energy-saving method for treating middle-aged and elderly garbage leachate wastewater. Background technique [0002] At present, for middle-aged and elderly landfill leachate treatment, the main processes used are: physical and chemical pretreatment - biological treatment - physical and chemical post-treatment. The main method of physical and chemical pretreatment is ozone oxidation; the biological treatment adopts conventional aerobic and anaerobic methods; the physical and chemical post-treatment stage currently mainly uses membrane filtration and advanced oxidation technology, and the advanced oxidation method mainly refers to adding o 3 , Photodecomposition of H 2 o 2 , Fenton's reagent, etc. to carry out oxidation treatment to make it reach a certain standard of effluent. After a new search, there is an invention patent for landfill leachate treatm...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F1/72
Inventor 单明军闽玉国
Owner UNIV OF SCI & TECH LIAONING
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