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Refuse landfill leachate treatment method and system

A technology for a landfill and a treatment method, which is applied in the field of leachate treatment in landfills, and can solve problems such as membrane pollution, blockage of flow channels, and sulfur pollution of sulfide membranes.

Active Publication Date: 2020-07-31
XIAMEN JIARONG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of this application is to provide a landfill leachate treatment method and system to solve the problems that the colloid in the raw water of the leachate will easily pollute the membrane or even block the flow channel, and the sulfide in the raw water will easily cause sulfur pollution to the membrane.

Method used

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  • Refuse landfill leachate treatment method and system
  • Refuse landfill leachate treatment method and system
  • Refuse landfill leachate treatment method and system

Examples

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Embodiment 1

[0053] The leachate raw water treated at a landfill in Henan, the original membrane process is "leachate raw water + basket filter + sand filter + core filter + two-stage DTRO + resin adsorption", due to the leachate raw water suspended matter content High, the sand filter is often backwashed, and the flow channel of the DTRO membrane is often blocked. Then adopt the process of "modified pretreatment + microfiltration (submerged MBR) + two-stage DTRO + resin adsorption". Type MBR unit, the water produced by microfiltration is sucked by a self-priming pump, the operating pressure is 20-50kpa, the bottom uses microporous aeration, and the aeration intensity is 100Nm 3 / h·m 2 , the microfiltration concentrated water reflux ratio is 50%, and the microfiltration product water enters the two-stage DTRO. Then the ammonia nitrogen is removed by resin adsorption and discharged up to the standard. The water quality of each stage is as follows:

[0054]

[0055]

Embodiment 2

[0057] The leachate raw water treated by a landfill in Shanxi, the original membrane process is "leachate raw water + basket filter + sand filter + core filter + two-stage DTRO + resin adsorption", because the leachate raw water has high suspended matter , sand washing is frequent, and the concentration of sulfide in the leachate raw water is high, and there is sulfur pollution in the DTRO membrane column. Then adopt the process of "modified pretreatment + microfiltration (submerged MBR) + two-stage DTRO + resin adsorption". Type MBR unit, the produced water is sucked by a self-priming pump, the operating pressure is 20-50kpa, the bottom uses microporous aeration, and the aeration intensity is 100Nm 3 / h·m 2 , the reflux ratio of the microfiltration concentrated water is 50%; the microfiltration product water enters the two-stage DTRO, the operating pressure of the first-stage DTRO is 50-75bar, the operating pressure of the second-stage DTRO is 20-30bar, and the two-stage DTR...

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Abstract

The invention discloses a refuse landfill leachate treatment method and system. The method comprises the following steps: adding a coagulant into leachate raw water for coagulating sedimentation to obtain a mixed solution; carrying out filter pressing on the precipitate in the mixed solution to obtain filter-pressed effluent; carrying out microfiltration treatment on the supernatant in the mixed solution to obtain microfiltration concentrated water and microfiltration produced water; reflowing the filter pressing effluent and the microfiltration concentrated water into the percolate raw waterfor circular treatment; and finally, carrying out two-stage DTRO treatment and resin adsorption treatment to obtain up-to-standard produced water. Long-term stable operation of the landfill leachate treatment system is ensured through multiple combined processes, and up-to-standard discharge of produced water is ensured; part of organic matters and large suspended particles can be removed throughcoagulating sedimentation, organic pollution of a subsequent micro-filtration membrane is relieved, colloid can be effectively intercepted through micro-filtration treatment to remove hydrogen sulfide, the problems that a membrane is polluted by two-stage DTRO colloid, even a flow channel is blocked and sulfur pollution is caused can be solved, and the method and the system are suitable for treating stock landfill leachate and biochemically poor aged leachate.

Description

technical field [0001] The invention belongs to the field of landfill leachate treatment, and in particular relates to a method and system for treating landfill leachate. Background technique [0002] With the development of the national economy and the improvement of people's living standards, the amount of domestic waste is also increasing day by day. At present, the average daily waste output per person in my country is 0.8-1.1kg, and it is increasing at a rate of 10% year by year. It is expected that by 2030 there will be to 409 million tons and to 528 million tons by 2050. Landfill is the main way to deal with garbage in my country. Landfill leachate is a kind of high-concentration organic wastewater produced in landfills. If it is not treated properly, landfill leachate will cause serious pollution to the surrounding surface water and groundwater. , a serious threat to the living environment of human beings. [0003] The water quality of the initial leachate of the lan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F9/04C02F1/28C02F1/44C02F1/52C02F1/74C02F3/12C02F103/06C02F101/10C02F101/30
CPCC02F9/00Y02W10/10
Inventor 郑飞龙陈俊祥陈宏静方艺民张建发陈福达邱宗炼
Owner XIAMEN JIARONG TECH CO LTD
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