Landfill leachate zero concentrated solution deep treatment system and method

Abstract

The invention discloses a landfill leachate zero concentrated solution deep treatment system and method. The landfill leachate zero concentrated solution deep treatment system comprises a flocculation catalytic filtration reactor, a first catalytic ozonation reactor, a high-speed turbulent flow reactor with a denitrification function, and a second catalytic ozonation reactor which are connected in sequence. The method is a deep treatment process that the system is adopted to treat landfill leachate wastewater which is treated by using a front process. With effective combination of techniques of high-efficiency biochemistry, high-class oxidation, catalytic reduction and the like, the landfill leachate after the biochemical treatment is deeply treated, so that the defects of a conventional landfill leachate deep treatment process are overcome while corresponding emission standards are met, and a zero concentrated solution treatment process is achieved in deed.

Description

Technical field [0001] The invention involves the field of garbage filtration solution treatment technology, and specially involves a deeper treatment system and method of a zero concentration solution of garbage filtration. Background technique [0002] At present, sanitary landfills have become the basic way for most urban garbage treatment in my country, and whether the garbage filtration liquid processing during the stacking and landfill process is to measure whether the landfill is an important indicator of the landfilling field. one.The garbage filtration liquid has complex components and contains a variety of pollution substances. It is a high -concentration organic wastewater. If it is not treated, it will cause serious pollution to the environment.The garbage filtration liquid is mainly produced in the garbage storage pit. It consists of the garbage composition of the garbage drainned by the garbage in the pile of the planting of the pit, and the organic matter rotten wa...

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Problems solved by technology

This kind of process leads to a large amount of concentrated liquid that needs subsequent disposal, accounting for about 40% of the advanced treatment water volume

Since there is no more reasonable concentrated liquid treatment technology so far, only relatively primitive methods (such as backspraying furnace, backfilling landfill, etc.) can be used for disposal. During these disposal processes, pollutants enter the environmental system again , forming secondary pollution;

[0007]2. The "nanofiltration + reverse osmosis" process consumes a lot of energy, and the operation and investment costs are high: after the conventional "nanofiltration + reverse osmosis" process passes through the nanofiltration water, Clean water enters the next stage of reverse osmosis membrane filtration, and the amount of treated water is large, and membrane separation is mainly through mechanical power, so the large amount of water will directly lead to the increase of energy consumption and cost of operation; and the nanofiltration and reverse osmosis technologies used in traditional processes are both It is a membrane separation technology, which involves investment and labor costs such as regular replacement and cleaning of the membrane, which increases the process cost accordingly;

[0008]3. Improper treatment of concentrated liquid can easily cause secondary pollution: due to the large amount of concentrated liquid produced in the conventional process of "nanofiltration + reverse osmosis", it far exceeds that of recharge or The demand load of back-spraying prevents the excess dope from being properly disposed of, resulting in secondary pollution;

[0009]4. Since both nanofiltration and reverse osmosis are physically separated, this technology cannot degrade target pollutants, but can only concentrate or transfer them. Therefore, traditional advanced treatment The process cannot effectively reduce the pollutant load of the biochemical effluent of landfill leachate; in addition, because the reverse osmosis process intercepts most of the salinity in the concentrated liquid, if the concentrated liquid recharge process is adopted, the above-mentioned refractory pollutants and salinity will continue to circulate and accumulate in the system, making the processing load continue to increase

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