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Combined processing technique of garbage percolates

A landfill leachate and treatment process technology, which is applied in the field of high-concentration organic wastewater treatment, can solve the problems of difficult treatment of deamination tail gas, small gas-liquid contact area, high investment and operation cost, and achieve good supplementary synergistic effect and reasonable operation cost , Reduce the effect of civil construction investment

Inactive Publication Date: 2011-05-04
四川宇阳环境工程有限公司
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Problems solved by technology

The first two forms are most used in China. The aeration tank blow-off method is not suitable for the treatment of high ammonia nitrogen leachate due to the small gas-liquid contact area and low blow-off efficiency. Although the blow-off method using the blow-off tower has a higher Removal efficiency, but it has the disadvantages of high investment and operation cost and difficult treatment of deammonization tail gas
Another method of denitrification is the use of anoxic / aerobic process. Although this process has the characteristics of short process, low construction cost and stable and reliable denitrification effect, it is only suitable for urban sewage and landfill leachate with low concentration. Treatment, not suitable for leachate in the middle and late stages of landfill

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  • Combined processing technique of garbage percolates
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Embodiment Construction

[0014] Attached below figure 2 , process method of the present invention is described in detail:

[0015] 1. The landfill leachate first passes through the grid to trap debris, and then enters the regulating tank. Since the water quality and water volume of landfill leachate are greatly affected by seasons and time, the function of the regulating tank is to concentrate a large amount of landfill leachate so that it can be lifted to the next treatment unit through the sewage pump, and at the same time, it can be uniform in water quality. And, reduce the load impact on the subsequent processing system.

[0016] 2. Lift the effluent in step 1 to the electrocoagulation device, the rising speed of the water flow is 12L / h; the reaction time is 2h, and the current density is 100mA / cm 2 Under certain conditions, more than 80% of pollutants can be removed.

[0017] 3. After the water is discharged from the electrocoagulation device, it enters the anoxic pool, and the residence time...

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Abstract

The invention relates to a combined processing technique of garbage percolate, mainly comprising the steps of grilling, regulating a tank, electrocoagulation, oxygen-poor / aerobic biochemical treatment, MBR separation, nanofiltration and reverse osmosis. The combined processing technique is suitable for processing the percolate at all stages in the refuse landfill, and has the advantages of high efficiency, stability, reliability, favorable processing effect, low sludge production, simple technical flow, adaptability of PLC control, high degree of automation, convenient operation and management, reasonable operating cost, no secondary sedimentation tanks and small occupying area. The effluent can achieve the recycling standard, thereby realizing zero discharge of pollution and having important practical value.

Description

technical field [0001] The invention relates to a treatment method for high-concentration organic wastewater, in particular to a combined treatment process for landfill leachate. Background technique [0002] Landfill leachate is the product of gravity flow of liquid in the landfill, mainly from precipitation and the embedded water of the waste itself. The water quality characteristics are mainly: (1) The composition of organic pollutants is complex, and the water quality of old landfill units changes relatively greatly with time; (2) BOD 5 (3) The metal content is higher; (4) The ammonia nitrogen content is higher; (5) The ratio of microbial nutrient elements is out of balance. [0003] With the rapid development of the economy and the substantial improvement of people's living standards, the amount of urban waste generation is increasing year by year. At present, most of the disposal methods of urban waste in my country are sanitary landfill and composting. The resultin...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/30C02F1/463C02F3/12C02F1/44
CPCY02W10/10
Inventor 夏宇扬
Owner 四川宇阳环境工程有限公司
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