Treatment method for high ammonia nitrogen landfill leachate

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...

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.

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