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Treatment method of landfill leachate with high ammonia nitrogen

A high-ammonia-nitrogen garbage and landfill leachate technology, applied in the field of sewage treatment, can solve the problems of difficult disposal, difficult to guarantee the effect, and limitations, and achieve the effects of reducing total hardness and alkalinity, maintaining stability, and running stably

Active Publication Date: 2020-06-16
WELLE ENVIRONMENTAL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the precipitation method requires excessive addition of phosphate, and the effluent contains phosphorus, so it is difficult to dispose of, which will increase the cost of landfill leachate treatment
The steam stripping method requires a large amount of steam and high energy consumption, which also increases the cost of landfill leachate treatment
The ion exchange treatment is to use ion exchange resins to adsorb organic matter and heavy metals in percolation, but the stability of ion exchange resins decreases after repeated regenerations, and the effect is difficult to guarantee, and most of them are limited to laboratory research.

Method used

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  • Treatment method of landfill leachate with high ammonia nitrogen

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The treatment of the present invention is used to treat the leachate of a certain landfill. The landfill has been buried for a long time, and its leachate has begun to "aging", and the carbon-nitrogen ratio has been reduced to 2:1. The water quality of the leachate was tested, and the specific water quality conditions are shown in Table 2.

[0040] Table 2

[0041] water quality index pH COD BOD Ammonia nitrogen total nitrogen SS total hardness TDS Valuemg / L 6-9 5000 1500 2500 2800 1000 5000 10000

[0042] Send the leachate into the sand filter. The particle size of the quartz sand in the sand filter is 0.5-1.5mm. After the sand filter removes impurities, the water quality is tested according to GB16889-2008. The solids in the treated leachate raw water are The removal rate of suspended matter SS is 95%, the removal rate of COD is 5%, the removal rate of BOD is 5%, the removal rate of ammonia nitrogen is 2%, the removal rate o...

Embodiment 2

[0050] Most of the incoming garbage in a landfill site is organic matter and nitrogen compounds. The leachate has a high concentration of organic matter, and the carbon-nitrogen ratio is reduced to 2:1. The water quality is shown in Table 3.

[0051] table 3

[0052] water quality index pH COD BOD Ammonia nitrogen total nitrogen SS total hardness TDS Valuemg / L 6-9 10000 4000 5000 5500 1000 3000 12000

[0053] Send the leachate into the sand filter. The particle size of the quartz sand in the sand filter is 0.5-1.5mm. After the sand filter removes impurities, the water quality is tested according to GB16889-2008. After the treatment, the SS in the raw water of the leachate is removed. The removal rate of COD is 6%, the removal rate of BOD is 6%, the removal rate of ammonia nitrogen is 3%, the removal rate of total nitrogen is 4%, the TDS is 10000mg / L, and the turbidity drops below 1NTU.

[0054] The leachate after sand filtration is s...

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Abstract

The invention relates to a treatment method of a high ammonia nitrogen landfill leachate. Particulates and suspended solids in the landfill leachate are intercepted through sand leach impurity removal treatment, the total hardness and alkalinity of the leachate are lowered through electrolysis scale removal treatment, the problem that scales are formed at the follow-up process section is solved, suspended solids and turbidity of the softening leachate are lowered through multi-medium filtering treatment, inorganic salinity and organic matter are separated through electrodialytic treatment, ammonia nitrogen is transferred to the concentrated water side to be recycled, low ammonia nitrogen water and degassing film drainage water produced through electrodialysis are subjected to film biochemical reaction treatment, and up-to-standard release film biological reaction treatment is ensured through the nanofiltration technology. The deamination pretreatment technology and the film depth treatment technology are combined, the combined technology treatment effect is good, operation is stable, the problem that biochemical treatment is hard due to the fact that the carbon nitrogen ratio of the high-concentration ammonia nitrogen leachate is imbalanced is solved, ammonia nitrogen is effectively recycled, high ammonia nitrogen can be recycled, and the investment and operation costs are low.

Description

technical field [0001] The invention relates to a treatment method for high-ammonia-nitrogen landfill leachate, which belongs to the technical field of sewage treatment. Background technique [0002] The municipal solid waste sanitary landfill process will produce a large amount of landfill leachate, and landfill leachate is a kind of high-concentration organic wastewater with complex components. It has the typical characteristics of high pollution load and comprehensive pollution. It has large water volume, deep color and complex water quality. , high concentration of organic matter, high concentration of ammonia nitrogen, etc. [0003] At present, the industry generally adopts the process of "pretreatment + biochemical treatment + membrane advanced treatment" to treat landfill leachate. Among them, biochemical treatment generally adopts nitrification-denitrification+MBR to ensure the deammonization effect. [0004] In the process of membrane bioreaction treatment, the ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/16
CPCC02F1/001C02F1/44C02F1/442C02F1/4602C02F1/4696C02F3/00C02F9/00C02F2101/16
Inventor 乐晨朱伟青李月中韩颖陈赟张怀玉朱卫兵浦燕新
Owner WELLE ENVIRONMENTAL GRP CO LTD
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