Method for treating leachate in refuse landfill site

A technology of landfill leachate and a treatment method, which is applied to the treatment field of landfill leachate in sanitary landfills, can solve the problems of thorough decomposition and removal of pollutants, the problems of ammonia nitrogen and total nitrogen treatment are not considered, and it is difficult to achieve, and the operation is achieved. The effect of low cost, stable operation and complete process

Inactive Publication Date: 2010-05-19
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process relies on physical separation technology and does not have pre-treatment processes such as biological treatment. It cannot fundamentally decompose and remove various pollutants in the leachate. The principle of decontamination is only the tra...

Method used

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  • Method for treating leachate in refuse landfill site
  • Method for treating leachate in refuse landfill site
  • Method for treating leachate in refuse landfill site

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A landfill leachate COD 8000-12000mg / L, BOD 2000-3000mg / L, ammonia nitrogen 1600-2400mg / L. The water quality is characterized by high concentration of organic matter, poor biodegradability of wastewater, and BOD / COD=0.2.

[0057] Anaerobic reactor operating load 5kgCOD / m 3 .d (the unit d here means "day", the same below), the operating temperature is controlled at 20-35 degrees Celsius, the pH is controlled below 7.0, and the COD removal rate is 30-40%. Anaerobic effluent COD is 5600-7200mg / L. This unit has no removal rate for ammonia nitrogen. The ammonia nitrogen in the anaerobic effluent is 1600-2400mg / L, and the total nitrogen is 1600-2400mg / L. The total nitrogen in the anaerobic effluent mainly exists in the form of ammonia nitrogen.

[0058] The BAF (biological aerated filter) unit acts as a pretreatment for ammonia nitrogen, and also has a high removal rate for total nitrogen and COD. The BAF unit is filled with polyurethane-based filler, the filler residence...

Embodiment 2

[0062] A landfill leachate COD 2000-4000mg / L, BOD 1000-2000mg / L, ammonia nitrogen 500-800mg / L. The water quality is characterized by fresh leachate, low concentration of organic matter, good biodegradability of wastewater, BOD / COD=0.5.

[0063] Anaerobic reactor operating load 1kgCOD / m 3 .d (the unit d here means "day", the same below), the operating temperature is controlled at 20-35 degrees Celsius, the pH is controlled below 7.0, and the COD removal rate is 20-30%. Anaerobic effluent COD is 1600-2800mg / L. This unit has no removal rate for ammonia nitrogen. The ammonia nitrogen in the anaerobic effluent is 500-800mg / L, and the total nitrogen is 500-800mg / L. The total nitrogen in the anaerobic effluent mainly exists in the form of ammonia nitrogen.

[0064]The BAF (biological aerated filter) unit has a removal rate of ammonia nitrogen of 40-50%, effluent ammonia nitrogen of 300-400mg / L, total nitrogen removal rate of 30-40%, and effluent total nitrogen of 350-480mg / L. The...

Embodiment 3

[0068] A landfill leachate COD 2000-4000mg / L, BOD 200-400mg / L, ammonia nitrogen 1000-1500mg / L. The water quality is characterized by old landfill leachate, with low concentration of organic matter, but high ammonia nitrogen, poor biodegradability of wastewater, BOD / COD=0.1.

[0069] Anaerobic reactor operating load 1kgCOD / m 3 .d (the unit d here means "day", the same below), the operating temperature is controlled at 20-35 degrees Celsius, the pH is controlled below 7.0, and the COD removal rate drops to 10-15%. Anaerobic effluent COD is 1800-3400mg / L. This unit has no removal rate for ammonia nitrogen. The ammonia nitrogen in the anaerobic effluent is 1000-1500mg / L, and the total nitrogen is 1000-1500mg / L. The total nitrogen in the anaerobic effluent mainly exists in the form of ammonia nitrogen.

[0070] The BAF (biological aerated filter) unit has a removal rate of ammonia nitrogen of 60-70%, 400-450mg / L of ammonia nitrogen in the effluent, 40-50% of the total nitrogen r...

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Abstract

The invention is applicable to the technical field of wastewater treatment, and provides a method for treating leachate in a refuse landfill site. The method adopts processes of anaerobic treatment, biological aerated treatment, secondary AO treatment, MBR treatment and reverse osmosis treatment, and effluent of the treated leachate wastewater in the refuse landfill site meets the pollution control standard for domestic refuse landfill (GB 16889-2008). The method does not need to adopt blowoff treatment, saves running cost, and adopts a coagulating sedimentation method to treat concentrate after the reverse osmosis treatment so as to avoid accumulation of organic matters and heavy metals in the system.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a treatment method for garbage leachate in sanitary landfills. Background technique [0002] The main sources of landfill leachate include: (1) natural rainfall and runoff in the landfill; (2) the original water content of the garbage itself; (3) water produced by anaerobic decomposition of microorganisms. The water quality of landfill leachate is very complex, not only containing oxygen-consuming organic pollutants, but also various metals and plant nutrients (ammonia nitrogen, etc.), industrial landfill leachate also contains toxic and harmful pollutants; BOD5, COD concentration is high, far higher In urban sewage; there are many types of organic pollutants in landfill leachate, including non-chlorinated aromatic compounds such as naphthalene and phenanthrene, chlorinated aromatic compounds, phosphate esters, phthalates, and phenolic compounds that are...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F1/44
Inventor 崔锋倪晋仁许楠袁春艳言海燕
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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