Landfill leachate wastewater treatment method and system, and water pollution control platform

Abstract

The invention belongs to the technical field of water pollution control, and discloses a landfill leachate wastewater treatment method and system, and a water pollution control platform; including an anaerobic tank, a reaction pool, a dielectric barrier discharge reactor, an AC power supply, a micro-nano bubble generator, Filtration unit; the anaerobic tank, reaction pool and filtration unit are connected in sequence, the dielectric barrier discharge reactor is arranged in the reaction pool, the AC power is used to drive the dielectric barrier discharge reactor, and the micro-nano bubble generator is used to generate micro-nano Air bubbles, the filter unit consists of a pre-filter column and a depth filter column. The invention can effectively degrade various organic pollutants in the landfill leachate, and can effectively degrade soluble COD, BOD 5 As well as nitrogen and phosphorus, they have good removal effects, are not affected by toxic and harmful substances in wastewater, and are suitable for treating complex wastewater that is difficult to biodegrade. The process structure of the invention is simple, and has the characteristics of small investment, less land occupation, low operation and maintenance costs, no secondary pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and in particular relates to a landfill leachate wastewater treatment method and system, and a water pollution control platform. Background technique [0002] Since the 1990s, with the increase of my country's urban population, the expansion of urban scale and the improvement of residents' living standards, the output of municipal solid waste has increased sharply. According to relevant data, the total amount of urban garbage in my country is growing at a rate of 8%-10%, and some cities are even higher, such as Beijing, whose growth rate is as high as 15%-20%. According to the current growth rate forecast, my country's urban waste will exceed 500 million tons in 2025, accounting for 1 / 4 of the world's total. The sanitary landfill method has been widely used in waste treatment due to its advantages of low cost, mature technology, and convenient management. The treatment capacity a...

AI Technical Summary

Problems solved by technology

[0005] (1) The biodegradability of landfill leachate is unstable, and the existing technology has limited ability to resist impact load, resulting in poor treatment effect

[0006] (2) Landfill leachate has COD, BOD 5 , ammonia nitrogen, etc., high content, variable components, large fluctuations in water quality and water volume, it is difficult to achieve discharge standards

[0007] (3) Many combined processes are too complex, resulting in high investment and operating costs, making it difficult to apply in practice

[0008] The difficulty in solving the above technical problems lies in: with the increase of the age of the landfill site, the proportion of nutrient elements is out of balance, the ratio of C / N in the leachate decreases, and the biodegradability decreases, making it difficult to treat it with biological methods; affected by rainfall, The water quantity and quality of landfill leachate fluctuate greatly, and a treatment process with the ability to withstand impact load is required; due to differences in waste components and landfill methods, the concentration of ammonia nitrogen ranges from tens to thousands of mg / L, and the high The concentration of ammonia nitrogen is extremely difficult to deal with

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