Household garbage transfer station leachate and flushing water treatment system and method and application

Abstract

The invention relates to a household garbage transfer station leachate and flushing water treatment system and method and application. The method sequentially comprises the steps of impurity removal, water collection regulation, coagulating sedimentation, biochemical treatment, sludge treatment, a matched water pump and a matched fan. Aiming at the characteristics of percolate and flushing water mixed liquor generated and discharged by small and medium-sized household garbage transfer stations in cities in which dry and wet garbage classification is implemented, an economical, simple, convenient and efficient physicochemical and biochemical combined treatment technology is adopted, and factors such as environment friendliness, economy and controllability, simplicity and convenience in operation and maintenance and the like of the transfer stations are considered, and the treated wastewater can stably meet the discharge requirement.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a leachate and flushing water treatment system, method and application of a domestic garbage transfer station. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the continuous advancement of my country's municipal solid waste classification policy, more and more cities advocate the classification and recycling of domestic waste. Therefore, more and more small and medium-sized municipal solid waste transfer stations have been completed and put into operation. The main function of these small and medium-sized municipal solid waste transfer stations is...

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Problems solved by technology

[0005] At present, the leachate treatment of large municipal solid waste landfills generally adopts the process of "pretreatment + biochemical treatment + membrane treatment + sludge treatment". Large investment, high energy consumption, and professional operation and maintenance personnel are required. Therefore, considering the factors of economy, operation and maintenance, and safety, it is not suitable for small and medium-sized municipal solid waste transfer stations; secondly, compared with large municipal solid waste landfills Leachate, the landfill leachate in the transfer station is relatively "fresh" and has good biochemical properties; at the same time, the transfer station requires a certain amount of tap water for ground flushing, so the concentration of wastewater pollutants produced by it is much lower than that of the leachate of municipal solid waste landfills ;Third, considering investment and operation and maintenance, it is not suitable to set up a special sludge treatment system for the sludge generated by the wastewater treatment in the transfer station, but needs a more convenient sludge treatment method

[0006] The existing treatment methods for leachate from waste transfers propose the use of electrocoagulation, photocatalytic oxidation, etc., which require strong professional operation and maintenance and power-consuming equipment. Secondly, this method requires a plate and frame filter press for sludge treatment, which also increases It improves the professionalism and energy consumption of the operation; again, this method is still aimed at high-concentration landfill leachate

Therefore, in view of the reasons of investment, energy consumption, operation and maintenance, and the characteristics of the leachate and flushing water mixture of small and medium-sized municipal solid waste transfer stations, this system is not suitable for the percolation and flushing water mixture of small and medium-sized municipal solid waste transfer stations. processing

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