Waste leachate recycling treatment system

Abstract

The invention relates to sewage treatment, and particularly relates to a waste leachate recycling treatment system. The waste leachate recycling treatment system comprises a leachate tank, an ammonium fertilizer conversion unit, a membrane bioreactor and a concentrating and drying unit which are sequentially arranged, wherein the ammonium fertilizer conversion unit comprises a deamination and softening device connected with a liquid outlet end of the leachate tank; a liquid outlet end and a gas outlet end of the deamination and softening device are respectively connected with a liquid inlet end of the membrane bioreactor and a gas inlet end of a carbonization tower; a liquid outlet end of the carbonization tower is connected with a material inlet end of an ammonium bicarbonate separation device; the membrane bioreactor comprises a biochemical reaction tank and an ultrafiltration unit which are sequentially arranged; and a material liquid inlet and a filtrate outlet of the ultrafiltration unit are respectively connected with a material liquid outlet of the biochemical reaction tank and an inlet of the concentrating and drying unit. Leachate is firstly subjected to deamination treatment, ammonium bicarbonate is synthesized by the carbonization tower to serve as a raw material for an ammonium bicarbonate fertilizer, the ammonia nitrogen content of the leachate after the deamination treatment is reduced, and the addition amount of a carbon source in later treatment is reduced, thereby lowering the treatment cost on the premise of ensuring the rational utilization of resources.

Description

technical field [0001] The invention relates to sewage treatment, in particular to a recovery and treatment system for landfill leachate. Background technique [0002] The so-called landfill leachate refers to the sewage seeping from the garbage in the landfill, which is rich in salt, humic acid, organic matter and other components. The COD and ammonia nitrogen content in the sewage are also far beyond the standard. Therefore, Landfill leachate needs to be treated to prevent environmental pollution. [0003] In the existing landfill leachate treatment process, the biochemical post-membrane concentration treatment process is adopted, and the carbon source added is more, and the cost is higher; after concentration, the reduction and transfer of various components cannot be achieved. Resource utilization, fundamentally speaking, the result of the final reduction has not been able to achieve the thorough treatment of landfill leachate, which is the technical bottleneck in the e...

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Problems solved by technology

[0003] In the existing landfill leachate treatment process, the biochemical post-membrane concentration treatment process is adopted, and the carbon source added is more, and the cost is higher; after concentration, the reduction and transfer of various components cannot be achieved. Resource utilization, fundamentally speaking, the result of the final reduction has not achieved the complete treatment of landfill leachate, which is the technical bottleneck in the existing treatment process

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