Resource process for percolation liquid of city life garbage landfill

A technology for municipal solid waste and landfills, applied in incinerators, climate change adaptation, anaerobic digestion, etc., can solve the problems of high retention rate, high concentration, high cost, etc., and achieve no secondary pollution and simple process , the effect of easy operation

Inactive Publication Date: 2005-08-03
TSINGHUA UNIV
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Problems solved by technology

Because reverse osmosis and nanofiltration generally have a high rejection rate for each component in the concentrate, including organic matter and inorganic salts, and their selectivity is poor, especially reverse osmosis, which almost indiscriminately intercepts all of them. Therefore, the concentrate The composition is complex and the concentration is high. At present, its treatment methods mainly include recharge, i

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  • Resource process for percolation liquid of city life garbage landfill

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Embodiment Construction

[0014] The leachate recycling process of the present invention will be further described below in conjunction with the accompanying drawings.

[0015] Such as figure 1 As shown, most of the organic matter contained in the leachate decomposed by the anaerobic bioreactor, or the leachate that has entered the landfill in the methanogenic stage, is relatively stable. This type of leachate is lifted by the pump into the sand filter tank to remove sludge and other particulate matter with a particle size greater than 1 to 10 μm to ensure the good operation of the subsequent ultrafiltration system. The effluent is then pumped into the first-stage ultrafiltration system, and the leachate is divided into two parts under the pressure (operating pressure difference: 0.3-0.5Mpa): one part is the first-class concentrated solution (concentration ratio: 5-10 times) intercepted by the membrane, It is rich in refractory biodegradable organic matter mainly composed of humic acid, and the concen...

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Abstract

The technological process of utilizing percolation liquid from domestic garbage landfill belongs to the field of garbage treating technology. The present invention aims at raising the percolation liquid treating level to reach the exhaust standard. The technological process of utilizing percolation liquid from domestic garbage landfill includes the following steps: 1) pumping the percolation liquid to the first stage of ultrafiltering system and treating in pressure difference of 0.3-0.5 MPa, 5-10 times concentration and membrane separation to obtain the first stage of concentrated liquid; 2) pumping into the second stage of ultrafiltering system and treating in pressure difference of 1.0-1.5 MPa, 4-5 times concentration and membrane separation to obtain the second stage of concentrated liquid; and 3) treating in immersing, burning and evaporating system at burning temperature over 750 deg.c, immersing depth 0.3-0.6 m and 5-10 times concentration to obtain liquid organic fertilizer.

Description

technical field [0001] The invention belongs to the technical field of garbage treatment, in particular to a recycling process for extracting humic acid from leachate of urban domestic garbage landfill and concentrating it into organic liquid fertilizer. Background technique [0002] Sanitary landfill has always been the main way of municipal solid waste disposal because of its low cost and reliable technology. In the daily operation and management of landfills, it is still a difficult problem to deal with leachate up to the standard, and it has become the main secondary method of municipal solid waste landfills. source of pollution. The essential reason for the difficult treatment of leachate is that the leachate contains high concentrations of refractory organic matter-humic acid and ammonia nitrogen. The former is actually more difficult to solve, because many studies and engineering practices have shown that as long as the reactor is selected reasonably or the process pa...

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Application Information

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IPC IPC(8): C02F1/44C02F3/28C02F9/14C05F9/00F23G7/04
CPCY02E50/343Y02A40/20Y02E50/30Y02W30/40
Inventor 聂永丰许玉东岳东北
Owner TSINGHUA UNIV
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