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Treatment method of leachate tail water based on advanced oxidation combination technology

A combined process and advanced oxidation technology, which is applied in special compound water treatment, polluted groundwater/leachate treatment, water/sewage treatment, etc., can solve the problem of difficult treatment of dense phase liquid after the membrane, and achieve the goal of reducing treatment costs Effect

Inactive Publication Date: 2018-11-13
中节能工程技术研究院有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] Aiming at the deficiencies of the existing technology, the present invention proposes a method for advanced treatment of landfill leachate tail water based on advanced oxidation combined process, the purpose is to seek to solve the problems faced by the current landfill leachate "pretreatment + biochemical treatment + membrane treatment" process A new way to deal with the difficult problem of dense phase liquid behind the membrane

Method used

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  • Treatment method of leachate tail water based on advanced oxidation combination technology

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Effect test

Embodiment 1

[0042] The leachate ultrafiltration effluent of a waste incineration plant in Jiangsu is used as the influent of the coagulation unit. The water quality of the ultrafiltration effluent is roughly as follows: pH is about 6.6; COD concentration is 500-600 mg / L; ammonia nitrogen concentration is 20-40mg / L; the total nitrogen concentration is about 100-200mg / L; the total phosphorus concentration is about 2mg / L; the color is tea yellow, basically no odor.

[0043] The flocculant polymerized ferric sulfate and polyacrylamide were successively added to the ultrafiltration water, and the dosages were 0.5g / L and 1.5mg / L respectively. In the coagulation unit, first add polyferric sulfate and then fully stir for 10 minutes, then add polyacrylamide and continue stirring for 20 minutes, the mixed water is left to settle for about 30 minutes, and the layers are divided into supernatant liquid and lower layer of precipitation. The supernatant was adjusted to pH 3.5 by adding hydrochloric ac...

Embodiment 2

[0049] The leachate tail water of a waste incineration plant in Hefei is used as the influent of the coagulation unit. The water quality of the tail water is roughly as follows: pH is about 6.2-6.7; COD concentration is about 250mg / L; ammonia nitrogen concentration is 10-20mg / L ; The total nitrogen concentration is about 60mg / L; the total phosphorus concentration is about 2mg / L; the color is light brown and has no peculiar smell.

[0050] The leachate tail water was treated by the method in Example 1. During the test operation, the dosage of polyferric sulfate and polyacrylamide was 0.2g / L and 1mg / L respectively, and the pH of the supernatant was adjusted to 3.2 left and right; adjust FeSO 4 ·7H 2 The dosages of O and 30% hydrogen peroxide were 0.08% and 0.27% respectively, the reaction time of water in the Fenton oxidation unit was 2h, and the precipitation was allowed to stand for 1h. The pH of the supernatant was adjusted to about 6.7. The aeration rate of the microalgae ...

Embodiment 3

[0054] The leachate biochemical effluent of a waste incineration plant in Jiangsu is used as the influent of the coagulation unit. The water quality of the biochemical effluent is roughly as follows: pH is 6.5-6.9; COD concentration is about 1200mg / L; ammonia nitrogen concentration is 45-60mg / L; The total nitrogen concentration is about 300mg / L; the total phosphorus concentration is about 2.3mg / L.

[0055] The leachate biochemical effluent was treated by the method in Example 1. During the test operation, the dosage of polyferric sulfate and polyacrylamide was 1g / L and 2mg / L respectively, and the pH of the supernatant was adjusted to about 3. ; adjust FeSO 4 ·7H 2 The dosages of O and 30% hydrogen peroxide were 0.7% and 3% respectively, the reaction time of water in the Fenton oxidation unit was 3 hours, and the precipitation was allowed to stand for 1 hour. The pH of the supernatant was adjusted to about 6.6. The aeration rate of the microalgae photobioreactor unit is contr...

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Abstract

The invention provides a treatment method of landfill leachate tail water based on an advanced oxidation combination technology. The treatment method comprises the following steps: (1) putting a certain amount of coagulant in the landfill leachate tail water, standing, and realizing separation in a coagulation unit; (2) enabling a supernatant of the coagulation unit to enter a Fenton unit, addingFeSO4 and H2O2, and fully mixing and reacting with the supernatant; (3) enabling effluent of the Fenton unit to enter a microalgae photobioreactor, and carrying out deep treatment. According to the treatment method of the landfill leachate tail water, provided by the invention, a traditional nitrification / denitrification aerated biological filter unit can be replaced, the microalgae photobioreactor is utilized for carrying deep treatment on the effluent treated by the Fenton unit, residual pollutants such as COD (Chemical Oxygen Demand), organic matters, ammonia nitrogen, nitrate nitrogen andphosphorus in water can be removed, and various indexes of the effluent can be comprehensively upgraded; meanwhile, generated microalgae biomass can be used as animal feed or a biological diesel raw material, so that the treatment cost of leachate is reduced.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a treatment method for garbage percolation waste water. Background technique [0002] With the acceleration of urbanization, the rapid increase of municipal solid waste has become one of the prominent environmental problems facing our country. Excessive and fast-growing urban waste will occupy a large area of ​​urban public areas. Improper disposal measures in the surrounding areas of waste dumps will cause the breeding of mosquitoes and flies, which will affect the health of urban residents and may cause damage to local groundwater, air and soil. heavily polluted. As a harmless domestic waste treatment technology, waste incineration power generation has the advantages of high treatment efficiency, complete killing of pathogenic bacteria and realization of resource utilization of waste, which has attracted great attention and attention from the country. Waste in...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/06C02F101/30C02F101/16C02F101/10
CPCC02F1/30C02F1/5236C02F1/5263C02F1/56C02F1/722C02F1/725C02F3/322C02F9/00C02F2101/105C02F2101/16C02F2101/30C02F2103/06C02F2305/026
Inventor 郭智邱明建徐伟王元月史振宇
Owner 中节能工程技术研究院有限公司
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