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Urban domestic garbage percolate comprehensive treatment method

A technology for comprehensive treatment of municipal solid waste, applied in the field of comprehensive treatment of municipal solid waste leachate, can solve problems such as increased treatment needs, secondary pollution, large amounts of sludge, etc. high effect

Active Publication Date: 2015-12-23
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the current anaerobic treatment of landfill leachate mostly adopts the upflow anaerobic sludge bed technology. This method will generate a large amount of sludge during operation, which will increase the need for new treatment and may cause secondary pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] For fresh domestic landfill leachate, the original COD concentration is 11000mg / L. The leachate enters the conditioning tank, where it is diluted and the pH is adjusted to 7.0 to 7.2, and then enters the upflow tubular anaerobic reactor equipped with soft fiber packing at a volume load of 4000 mg / LCOD for 37 degrees Celsius mesophilic anaerobic fermentation. The diameter of the tubular reactor is 150mm, the height is 900mm, the ratio of diameter to height is 1:6, and the total volume is 16L; the soft fiber filler is aldehyde fiber, the diameter is 130mm, the upper and lower spacing of the filler is 80mm, and the internal circulation of the reactor is opened intermittently. The pump makes the material and liquid fully mixed and improves the mass transfer efficiency. The volume gas production rate at this stage is 5-8L / L.d, and the COD removal rate is 68-73%. For the residual liquid after fermentation, take part of it and return it to the adjustment tank to dilute the in...

Embodiment 2

[0019] For fresh domestic landfill leachate, the original COD concentration is 11000mg / L. The leachate enters the conditioning tank, where it is diluted and the pH is adjusted to 7.0 to 7.2, and then enters the up-flow tubular anaerobic reactor equipped with soft fiber packing with a volume load of 4000 mg / LCOD for anaerobic fermentation, tubular reaction The diameter of the reactor is 150mm, the height is 900mm, the ratio of diameter to height is 1:6, and the total volume is 16L; the soft fiber filler is aldehyde fiber, the diameter is 130mm, and the upper and lower spacing of the filler is 80mm. The material and liquid are fully mixed to improve the mass transfer efficiency. The volume gas production rate at this stage is 5-8L / L.d, and the COD removal rate is 68-73%. The residual liquid after fermentation is taken and returned to the adjustment tank to dilute the initial leachate, and the remaining fermentation residual liquid is used for the dilution of the hybrid Penniset...

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PUM

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Abstract

The present invention discloses an urban domestic garbage percolate comprehensive treatment method, which comprises: (1) carrying out dilution and pH value adjustment on urban domestic garbage percolate; (2) carrying out anaerobic fermentation and methane recovery on the percolate; (3) using the partial residual liquid after completing the fermentation as the initial percolate in the dilution step (1), using the remaining residual liquid for diluting a lignocellulose fermentation raw material, and adjusting the pH value; and (4) carrying out anaerobic fermentation and methane recovery on the lignocellulose fermentation raw material treated in the step (3). According to the present invention, with the method, the performance and the efficiency of the anaerobic fermentation can be improved, the heavy metal concentration of the urban domestic garbage percolate can be easily reduced, and advantages of water saving, raw material utilization rate improving, and biogas yield increasing are provided.

Description

technical field [0001] The invention relates to the technical field of municipal solid waste treatment, in particular to a comprehensive treatment method for municipal solid waste leachate. technical background [0002] With the continuous acceleration of urbanization and the rapid improvement of national living standards, the total amount of urban domestic waste in my country has also increased. , the annual volume of urban domestic waste in my country is about 171 million tons. Domestic garbage not only produces foul odor, but also generates mosquitoes and flies and infectious diseases. If it cannot be properly handled, it will cause serious pollution to the surrounding soil, air, water and other environments. Therefore, the treatment and disposal of domestic garbage has become the focus of urban construction. question. The treatment methods of domestic waste mainly include sanitary landfill, composting, incineration, pyrolysis and so on. There are few combustible substa...

Claims

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Application Information

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IPC IPC(8): C02F9/14C12P5/02
CPCY02E50/30
Inventor 袁振宏王瑶孔晓英孙永明庄新姝
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI