Precise aeration and combined defoaming process scheme for landfill leachate treatment

Abstract

The invention discloses a precise aeration and combined defoaming process scheme for garbage leachate treatment, which is characterized in that it includes three parts: a precise aeration subsystem, a combined defoaming subsystem and an electrical automatic control subsystem. The main equipment of the air sub-system includes: blower, jet pump, jet aeration head, etc. This is a high-efficiency aeration system equipped with a frequency converter, which can adjust the aeration volume in a wide range according to the process needs and realize large-bubble aeration and small bubble aeration conversion; the main equipment of the combined defoaming subsystem includes: defoamer dosing pump, acid dosing pump, urea dosing pump, ultrafiltration water spray valve, ultrafiltration water spray pump, ultrafiltration Backflow valve, defoaming spray head, sludge diversion manual valve, anoxic and aerobic connecting valve, submersible mixer, etc., and the cooling towers, sludge circulation pumps, ultrafiltration circulation pumps and other equipment for adjusting the aerobic pool are also certain To a certain extent, it plays an auxiliary defoaming effect. The operation of the above-mentioned equipment can treat both symptoms and root causes, and implement 12 kinds of defoaming process means or a combination of the 12 kinds of process means to effectively control and eliminate the foam generated during the aeration process.

Description

Technical field [0001] The invention relates to a precise aeration and combined defoaming process scheme for garbage leachate treatment, belonging to the technical field of sewage treatment. Background technique [0002] The continuous expansion of the city scale has caused a large amount of domestic garbage, which seriously pollutes the ecological environment, and the harmless treatment of garbage is becoming increasingly urgent. Commonly used waste disposal methods mainly include: landfill, composting, and incineration. Due to comprehensive factors such as rainfall and the fermentation and decomposition of the garbage itself, a large amount of garbage leachate will be generated during the garbage treatment process. Landfill leachate has a high concentration of organic pollutants, extremely complex components, and has certain biological toxicity. It is one of the more difficult wastewater to treat. In order to prevent serious secondary pollution to the environment, landfi...

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Problems solved by technology

[0004] In addition, the aerobic degradation process of organic matter consumes a large amount of oxygen, and the treatment effect is difficult to be guaranteed due to insufficient aeration, while excessive aeration will cause a lot of waste of energy consumption, and will also cause a certain degree of negative impact on the stable operation of the system. Therefore, it is very necessary to adjust the aeration rate in time according to the change of the influent water quality and water volume of the landfill leachate and the operating conditions of the system.

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