Aeration system for landfill leachate wastewater

Abstract

The invention provides an aeration system for landfill leachate wastewater. The aeration system is used for the aeration of a reaction facility for treating wastewater, and landfill leachate is storedin the reaction facility; the aeration system is characterized by comprising a gas supply device, a liquid supply device, a gas-water jet device and a swirl-mixing aerator, wherein the gas-water jetdevice comprises a jet device and a gas-water mixing pipe extending from the jet device into the reaction facility; the gas-water jet device is communicated with the gas supply device and the liquid supply device and is used for receiving gas and liquid and conveying the gas and the liquid to the reaction facility via the gas-water mixing pipeline after mixing the gas and the liquid; the swirl-mixing aerator is arranged at the tail end of the gas-water mixing pipe, and the swirl-mixing is also arranged at the bottom of the reaction facility. By adopting the aeration system, the effective degradation of pollutants in water can be achieved, sewage blocking can be effectively prevented, the overloading of aeration fans is avoided, and the equipment maintenance strength is reduced.

Description

technical field [0001] The invention relates to the field of sewage purification, in particular to an aeration system for landfill leachate waste water. Background technique [0002] Landfill leachate is a black or yellowish-brown liquid with a foul smell. The leachate contains a large amount of organic and inorganic substances, including various refractory organic substances (such as various aromatic compounds and humus, etc.), inorganic salts (such as ammonium, carbonate and sulfate, etc.) and metal ions (such as chromium, lead and copper, etc.). Due to the complex composition of the garbage, one of the characteristics of the water quality of landfill leachate is the high content of pollutants, including high COD (chemical oxygen demand), high ammonia nitrogen, high SS (suspended solid concentration), etc. The treatment of leachate has always been It is a very difficult problem in the field of sewage purification. [0003] For landfill leachate wastewater, biological tre...

AI Technical Summary

Problems solved by technology

[0003] For landfill leachate wastewater, biological treatment methods are mostly used in the current stage. In the stage of aerobic biological treatment, such as microporous tube membrane aeration or mesopore perforated tube aeration system, often because the aerator is easily blocked by fouling, resulting in supply Insufficient oxygen, DO (dissolved oxygen, Dissolved Oxygen) is low, resulting in insufficient degradation of pollutants, and it is easy to cause overload failure of the fan that provides the air source

And once the aerator is blocked, it can only be shut down for maintenance, which increases the instability of the operation of the aeration system or reaction facilities

Images