Landfill leachate full-quantitative treatment system, method and application

Abstract

The invention belongs to the technical field of landfill leachate treatment, and discloses a landfill leachate full-quantitative treatment system, method and application; the landfill leachate full-quantitative treatment system comprises a dielectric barrier discharge catalytic treatment integrated device, an SBR-MBR biochemical treatment device and a PLC control device; the dielectric barrier discharge catalytic treatment integrated device is communicated with the SBR-MBR biochemical treatment device through a water delivery pipeline, and the PLC control device is respectively connected withthe dielectric barrier discharge catalytic treatment integrated device and the SBR-MBR biochemical treatment device through connecting lines; the dielectric barrier discharge catalytic treatment integrated device decomposes organic pollutants difficult to biochemically degrade in the landfill leachate, the biodegradability of the landfill leachate is improved; the SBR-MBR biochemical treatment device removes COD, BOD5, nitrogen and phosphorus in the biochemical landfill leachate, no concentrated solution is generated in the whole technological process, full-quantitative treatment of the landfill leachate is achieved, and the invention has the advantages of low investment, low operation cost and the like.

Description

technical field [0001] The invention belongs to the technical field of landfill leachate treatment, and in particular relates to a system, method and application of a total quantitative treatment of landfill leachate. Background technique [0002] Landfill leachate refers to the moisture contained in the garbage itself in the landfill, the rain and snow water and other moisture entering the landfill, deducting the saturated water holding capacity of the garbage and the covering soil, and passing through the garbage layer and the covering soil. A high concentration wastewater. Due to the influence of various factors such as garbage composition, landfill time, and climatic conditions, this type of wastewater has a very complex composition and various types of organic pollution. It generally presents the characteristics of "three highs", namely high COD, high ammonia nitrogen and high salinity. In addition, most landfill leachate contains a variety of heavy metal ions, and the...

AI Technical Summary

Problems solved by technology

But this process has a fatal weakness in technology, that is, its water yield is less than 75%, and it will produce more than 25% of the concentrate, and the concentrate is a kind of salt content, chroma, ammonia nitrogen, total nitrogen, Wastewater with higher COD is more difficult to treat

For the concentrate produced by the "double membrane" treatment, some methods are to refill the concentrate to the landfill, so that the pollutants can return to the landfill leachate, but as the pollutants continue to accumulate, the system will eventually be paralyzed ; Some methods are evaporative crystallization, but the investment and operating costs are too high, and the actual operation is not feasible

In addition, the use of "double-membrane" treatment also has disadvantages such as easy membrane pollution, clogging, complicated operation and management, large investment, and high operating costs.

[0005] Through the above analysis, the existing problems and defects of the existing technology are: the "double-membrane" treatment has a low water yield, which will produce a concentrated solution that is more difficult to handle, and the use of "double-membrane" treatment also has membranes that are easy to pollute, clog, and operate. Disadvantages such as complex management, large investment, and high operating costs

[0006] The difficulty in solving the above problems and defects is as follows: the "double-membrane" treatment process will inevitably produce concentrated liquid, so that the full quantitative treatment of landfill leachate cannot be realized, which is a technical bottleneck that cannot be broken through by this process; membrane fouling and clogging are In the process of membrane filtration, particles, colloidal particles or solute macromolecules in water interact with the membrane physicochemically or mechanically, causing adsorption and deposition on the surface of the membrane or in the pores of the membrane, causing the membrane pore size to become smaller or clogged, causing the membrane to produce Due to the irreversible change of permeation flow and separation characteristics, the service life of the membrane can only be extended through frequent and complicated cleaning processes, which will inevitably lead to problems such as complex operation and management, large investment, and high operating costs, which cannot be overcome by this process problem

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