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Landfill leachate zero-emission treatment device and method

A landfill leachate and treatment device technology, applied in the direction of contaminated groundwater/leachate treatment, multi-stage water treatment, water/sewage treatment, etc., can solve problems such as inability to achieve zero discharge, difficulty in recycling, waste of resources, etc.

Pending Publication Date: 2019-11-29
XIAMEN JIARONG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to provide a zero-discharge treatment device and method for landfill leachate to solve the above-mentioned high content of ammonia nitrogen in old landfill leachate or stock landfill leachate, which is difficult to process, difficult to recycle, and easy to cause waste of resources. Unable to achieve zero emissions and other issues

Method used

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Experimental program
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Effect test

Embodiment 1

[0061] The landfill leachate was taken for the above test. The ammonia nitrogen content of the leachate stock solution was 2881mg / L, the COD content was 11500mg / L, and the total hardness was 1312mg / L. Among them, the first-level nanofiltration membrane system chooses the disc-tube nanofiltration membrane module (the first-level DTNF membrane system), and the second-level nanofiltration membrane system chooses the disc-type nanofiltration membrane module (the second-level DTNF membrane system). The ammonia nitrogen content of the third water product produced after the first-stage DTNF membrane system treatment is 2500mg / L, the COD content is 1100mg / L, and the total hardness is 260mg / L. It can be seen that the ammonia nitrogen content in the third product water product treated by the first-stage DTNF membrane system did not decrease too much, but the COD content and total hardness decreased significantly, the COD content decreased by 90%, and the total hardness decreased by 80%. ...

Embodiment 2

[0063] The landfill leachate was taken for the above test. The ammonia nitrogen content of the leachate stock solution was 2881mg / L, the COD content was 11500mg / L, and the total hardness was 1312mg / L. Among them, the first-level nanofiltration membrane system chooses the disc-tubular nanofiltration membrane module (DTNF membrane system), and the second-level nanofiltration membrane system chooses the micro-tubular nanofiltration membrane module (MTNF membrane system). After being treated by DTNF membrane system, the ammonia nitrogen content of the third produced water product is 2500mg / L, the COD content is 1100mg / L, and the total hardness is 260mg / L. It can be seen that the ammonia nitrogen content in the third water product treated by the DTNF membrane system did not decrease too much, but the COD content and total hardness decreased significantly, the COD content decreased by 90%, and the total hardness decreased by 80%. The ammonia nitrogen content of the first water produ...

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Abstract

The invention provides a landfill leachate zero-emission treatment device, which comprises a membrane treatment system, a deamination system, an adsorption system, a curing system and an evaporation system. The membrane treatment system is used for filtering landfill leachate to generate a first produced water product and a first concentrated water product, the first produced water product is sentinto a deamination system to remove ammonia nitrogen so as to obtain a second produced water product and an ammonium salt, the first concentrated water product is sent into an evaporation system forevaporation to obtain evaporation condensate water and evaporation residue, the evaporation residue is sent into the curing system for curing treatment, and the second produced water product is sent into the adsorption system for adsorption so as to obtain the final produced water. The membrane treatment system is employed to treat landfill leachate to remove most of COD and total hardness, then the deamination system is adopted to recycle most of the ammonia nitrogen and convert the recycled ammonia nitrogen into an ammonium salt for resource utilization, and a concentrated solution of the membrane treatment system is subjected to low-temperature evaporation and re-curing treatment so as to achieve the effect of zero emission.

Description

technical field [0001] The invention belongs to the field of landfill leachate treatment, and in particular relates to a device and method for zero discharge of landfill leachate. Background technique [0002] Domestic garbage is generally treated in the way of mixed collection and mixed landfill. The components of garbage are complex and changeable. The impact of various factors such as the burial cycle and weather changes will easily lead to the deterioration of the water quality of landfill leachate. [0003] Due to the high content of ammonia nitrogen in the landfill leachate, the cost of landfill leachate treatment is greatly increased. The concentration of ammonia nitrogen in the raw liquid of landfill leachate accounts for more than 95% of the total nitrogen concentration. If the ammonia nitrogen in the landfill leachate is converted into ammonia fertilizer, it will not only be effective It can reduce the difficulty of treating ammonia nitrogen in the landfill leacha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/16C02F101/30C02F103/06
CPCC02F9/00C02F2103/06C02F1/442C02F2301/08C02F1/283C02F2101/16C02F1/04C02F2101/30
Inventor 王如顺蒋林煜宋燕清方艺民王舒东郑飞龙陈宏静蒋乾虹李飞刘德灿关俊杰王少东陈福达邱宗炼陈梁超
Owner XIAMEN JIARONG TECH CO LTD
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