Landfill leachate treatment system

Abstract

The invention relates to a landfill leachate treatment system which is sequentially provided with a zeolite tank, an ammoniation tank, an ultrafiltration tank, an iron-carbon tank, a sedimentation tank and an evaporation tank, a water outlet of the zeolite tank is connected with the ammoniation tank, the ammoniation tank is connected with the ultrafiltration tank, a concentrated solution of the ultrafiltration tank is conveyed to a Fenton tank, and the Fenton tank is communicated with a biochemical tank; ultrafiltration permeate is conveyed to the iron-carbon tank, and iron-carbon tank effluent is conveyed to the sedimentation tank. The landfill leachate treatment system is further provided with a wall breaking tank and a microfiltration tank, polyphosphate sludge is added into the wall breaking tank for wall breaking treatment, effluent of the wall breaking tank is conveyed to the microfiltration tank, effluent of the microfiltration tank is conveyed to the sedimentation tank, the sedimentation tank is further provided with a sedimentation agent inlet, and effluent of the sedimentation tank is conveyed to the evaporation tank for evaporation treatment. The landfill leachate treatment system can improve the biochemical treatment efficiency.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a landfill leachate treatment system. Background technique [0002] Landfill leachate is a kind of high-concentration organic wastewater with high salt content, high COD concentration, high ammonia nitrogen content, complex composition, serious imbalance of microbial nutrient elements, difficult to degrade, and poor biodegradability. It is a difficult wastewater to treat. In view of the characteristics of high COD, ammonia nitrogen and salt content in landfill leachate and fermented biogas slurry, the current domestic treatment methods for this type of wastewater mainly include: coagulation sedimentation, membrane desalination, stripping deamination, evaporation crystallization, biochemical treatment Wait. [0003] CN104787982B discloses a treatment method for landfill leachate, which discloses the use of anaerobic tanks to ammonify organic nitrogen, and then ent...

AI Technical Summary

Problems solved by technology

[0003] CN104787982B discloses a treatment method for landfill leachate, which discloses the use of anaerobic tanks to ammonify organic nitrogen, and then enters the nitrification tank to degrade organic matter and nitrify ammonia, and then perform ultrafiltration, electrodialysis and other treatments. Its plan mixes part of the landfill leachate with the sludge in the nitrification section and the electrodialysis concentrate, and uses the high nitrate nitrogen contained in the concentrate to oxidize organic pollutants and ammonia nitrogen under supercritical water conditions. However, as we all know, ammonia nitrogen is a resource. The plan does not recycle ammonia nitrogen, but uses the nitrification reaction in the nitrification tank to oxidize it, which will consume a lot of oxygen and consume a lot of energy

[0004] However, in the prior art, the organic nitrogen is usually ammonified and oxidized to form nitrate, which not only wastes hope but also increases the energy consumption of the system. How to make full use of the nitrogen source in the wastewater and reduce energy consumption needs to be solved urgently

Images