A compound landfill leachate treatment system

Abstract

The invention provides a compound landfill leachate treatment system, which includes a liquid collection pool, a fine filter tower, an electrolytic pool, a three-dimensional electrode pool, a hydraulic cavitation pool, and a bioresin pool connected by pipelines in sequence; the electrolytic pool is filled with iron Carbon mixed filler layer, the electrolytic cell is provided with a water inlet and a water outlet, and the water inlet and water outlet of the electrolytic cell are respectively located on different sides of the iron-carbon mixed filler layer; the three-dimensional electrode pool includes a graphene sponge, an anode and a cathode, and the graphene The sponge is filled in the three-dimensional electrode pool, the anode and the cathode are inserted into the graphene sponge at a certain distance, and the anode and the cathode are electrically connected with a DC power supply; the hydrodynamic cavitation pool is equipped with an air aeration device and an ultrasonic generator; the bioresin pool is equipped with Magnetic anion exchange resin packing layer. The compound landfill leachate treatment system of the present invention can purify the landfill leachate, degrade organic matter and nitrate in the landfill leachate, and realize synchronous deep denitrification and carbon removal of the landfill leachate.

Description

technical field [0001] The invention belongs to the field of water treatment equipment, in particular to a composite landfill leachate treatment system. Background technique [0002] With the rapid development of my country's social economy and the acceleration of urbanization, the amount of domestic waste generated by residents has increased significantly. Sanitary landfill of garbage has the advantages of large treatment capacity, simple treatment, quick effect and mature technology, so it has been widely used in my country in recent years. However, due to the precipitation and the moisture inside the garbage, a large amount of leachate will inevitably be produced during the use of the landfill. The leachate has serious pollution. The effluent has a high concentration of ammonia nitrogen, a large amount of complex organic matter, a large number of heavy metal ions, and an imbalance of microbial nutrients. If it is not treated and discharged at will, it will have a seriou...

AI Technical Summary

Problems solved by technology

However, due to precipitation and the moisture inside the garbage, a large amount of leachate will inevitably be produced during the use of the landfill. The leachate is seriously polluting. Its most obvious features are high chroma and odor, large fluctuations in water quality and quantity, The concentration of ammonia nitrogen in the effluent is high, the composition of organic matter is complex and large, the types of heavy metal ions are many, and the proportion of microbial nutrition is out of balance, etc.

If it is discharged without treatment, it will have a serious impact on the surrounding environment.

[0003] At present, my country's rural domestic waste treatment mainly adopts the model of "household classification, village collection, township transfer, and county treatment". Due to the limitations of the county's domestic waste collection and transportation system and the lack of supporting sanitation facilities, some rural domestic waste will be collected in villages and towns. The retention time in the transfer station ranges from a few days to several months. The garbage stays in the transfer station for a relatively short time, and the duration of the biodegradation process is relatively short. The biodegradability of the leachate produced is generally slightly higher than that of the landfill leachate. , and has the characteristics of dispersion and small volume. The leachate treatment project of village and township garbage transfer stations cannot simply copy the treatment methods of rural domestic sewage and landfill leachate. Therefore, appropriate pollution control measures are urgently needed for the leachate of village and township garbage transfer stations.

[0004] Domestic and foreign leachate treatment technologies can be mainly divided into land treatment technology, biotechnology and physical and chemical technology, but these treatment technologies have complex structures, high construction costs, and low treatment efficiency

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