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Landfill leachate concentrated liquor zero-recharge treatment process

A landfill leachate and treatment process technology, which is applied in the field of landfill leachate concentrate zero-recharge treatment process, can solve the problems of incomplete treatment and difficult treatment of landfill leachate concentrate, achieve strong treatment effect and improve overall stability Sexuality and wide application range

Inactive Publication Date: 2020-08-14
杭州深瑞环境有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a new zero-recharge treatment process for landfill leachate concentrate, aiming at the defects of difficult and incomplete treatment of landfill leachate concentrate existing in the prior art

Method used

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  • Landfill leachate concentrated liquor zero-recharge treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A zero-recharge treatment process for landfill leachate concentrated liquid, the treatment steps are as follows:

[0041] (a) softening treatment

[0042] The landfill leachate concentrated liquid in the concentrated liquid storage tank enters the softening and filtering device, and a softener is added to the landfill leachate liquid to react to reduce the hardness of the landfill leachate liquid. After the reaction, solid-liquid separation is performed to produce softened water and softening sludge;

[0043] (b) Nanofiltration treatment

[0044] The softened product water enters the nanofiltration membrane treatment device for salt separation, and the nanofiltration membrane treatment device selectively intercepts part of the inorganic salt in the softened product water, reduces the salt content in the softened product water, and produces nanofiltration membrane product water and nanofiltration membrane Concentrate;

[0045] (c) reverse osmosis treatment

[0046] T...

Embodiment 2

[0062] A zero-recharge treatment process for landfill leachate concentrated liquid, the treatment steps are as follows:

[0063] (a) softening treatment

[0064] The landfill leachate concentrated liquid in the concentrated liquid storage tank enters the softening and filtering device, and a softener is added to the landfill leachate liquid to react to reduce the hardness of the landfill leachate liquid. After the reaction, solid-liquid separation is performed to produce softened water and softening sludge;

[0065] (b) Nanofiltration treatment

[0066] The softened product water enters the nanofiltration membrane treatment device for salt separation, and the nanofiltration membrane treatment device selectively intercepts part of the inorganic salt in the softened product water, reduces the salt content in the softened product water, and produces nanofiltration membrane product water and nanofiltration membrane Concentrate;

[0067] (c) reverse osmosis treatment

[0068] T...

Embodiment 3

[0084] A zero-recharge treatment process for landfill leachate concentrated liquid, the treatment steps are as follows:

[0085] (a) softening treatment

[0086] The landfill leachate concentrated liquid in the concentrated liquid storage tank enters the softening and filtering device, and a softener is added to the landfill leachate liquid to react to reduce the hardness of the landfill leachate liquid. After the reaction, solid-liquid separation is performed to produce softened water and softening sludge;

[0087] (b) Nanofiltration treatment

[0088] The softened product water enters the nanofiltration membrane treatment device for salt separation, and the nanofiltration membrane treatment device selectively intercepts part of the inorganic salt in the softened product water, reduces the salt content in the softened product water, and produces nanofiltration membrane product water and nanofiltration membrane Concentrate;

[0089] (c) reverse osmosis treatment

[0090] T...

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Abstract

The invention discloses a landfill leachate concentrated liquor zero-recharge treatment process which comprises the following treatment steps: (a) softening treatment: reducing the hardness of landfill leachate concentrated liquor; (b) nanofiltering treatment: enabling softened produced water to enter a nanofiltering membrane treatment device for salt separation; (c) reverse osmosis treatment: enabling the water produced by a nanofiltering membrane to enter a reverse osmosis membrane treatment device for concentration and separation; (d) wet oxidation treatment: enabling the nanofiltering membrane concentrated solution to enter a wet oxidation device for degradation; (e) evaporative crystallization treatment: enabling the reverse osmosis membrane concentrated solution to enter an evaporative crystallization device to be evaporated; and (f) biochemical treatment: mixing wet oxidation effluent, reverse osmosis membrane produced water and condensed water to form mixed wastewater, feedingthe mixed wastewater into a biochemical treatment device, and discharging biochemical effluent. The process can effectively realize zero-recharge and up-to-standard discharge of the landfill leachateconcentrated solution, and has the characteristics of good process stability, strong treatment effect, wide application range and the like.

Description

technical field [0001] The invention relates to a sewage treatment process, in particular to a zero-recharge treatment process for concentrated liquid of landfill leachate. Background technique [0002] The treatment methods of domestic waste in my country mainly include landfill and incineration. No matter what treatment method is adopted, it is accompanied by the generation of concentrated landfill leachate. Therefore, the treatment of concentrated landfill leachate is an indispensable part of domestic waste treatment. The water quality of landfill leachate concentrate, especially late-stage leachate concentrate, is extremely complex, with the characteristics of low concentration of degradable organic matter and high salinity, so the treatment of leachate has always been a worldwide problem. [0003] The proportion of easily biodegradable organic matter in late-stage leachate with a landfill age of more than 3 to 5 years is significantly reduced, and its BOD / COD value is g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/06C02F101/30
CPCC02F9/00C02F5/08C02F1/442C02F1/441C02F1/72C02F1/04C02F3/00C02F3/30C02F2101/30C02F2103/06
Inventor 伍立波
Owner 杭州深瑞环境有限公司
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