Wastewater treatment device and wastewater treatment method thereof

Abstract

The invention relates to a wastewater treatment device and a wastewater treatment method thereof. The wastewater treatment device mainly comprises an aerobic expanded bed, an oxygenator, a circulating pump, a feeding pump, a feeding tank, a heating pump, an air pump, a heater and a data control cabinet. According to the invention, by controlling of the rate of circulating water flow, operation of the aerobic expanded bed in an expansion state is realized, so short circuiting water flow is avoided, and organic matter removal loading is improved; a biochemical reaction and oxygen dissolution of the wastewater treatment device are separately completed and independently controlled, so mutual interference of oxygen dissolution and biochemistry performed in a same space in a traditional biochemical process is avoided, and optimization of processes of the biochemical reaction and the oxygen dissolution can be synchronously realized; the aerobic expanded bed and the oxygenator can adopt a high equipment height, and the thickness of a material filling area of the aerobic expanded bed is improved, so the occupied area of a land is reduced, and the efficiency of oxygen dissolution is improved; and the wastewater treatment device has the advantages of less investment, saved occupied land area, high benefits, simple and convenient operation, stable treatment effect, capability of greatly reducing manual labor intensity, and high economic benefits.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and environmental protection, and relates to a waste water treatment device and a waste water treatment method thereof, and furthermore, relates to an aerobic expanded bed device and a method for waste water treatment. Background technique [0002] In wastewater treatment, aerobic biological treatment (biochemical treatment) is the most commonly used process, but due to the improvement of wastewater discharge standards, the difficulty of wastewater biochemical treatment has increased accordingly. For wastewater that has undergone biochemical treatment and does not meet the discharge standards, further advanced wastewater treatment is required. [0003] Biological aerated filter is currently a commonly used advanced wastewater treatment process. The biological aerated filter treatment process can effectively carry out the advanced treatment of wastewater, but there are also shortcomings ...

AI Technical Summary

Problems solved by technology

The biological aerated filter treatment process can effectively carry out advanced wastewater treatment, but there are also disadvantages such as high investment, high operating costs, large floor area, and small treatment load.

[0004] First of all, the packing bed in the biological aerated filter operates as a fixed bed. After a certain period of time, due to the uneven distribution of water and air, the growth of the biofilm will be uneven, which will lead to a short circuit of the water flow through the packing bed. affect the overall processing efficiency;

[0005] Secondly, the wastewater to be treated passes through the packed bed once, the contact time between the wastewater and the biofilm is short, and the stability of the treatment effect is not high;

[0006] Third, air needs to be blown into the bottom of the packing bed to provide the biofilm growing on the packing with the oxygen needed to degrade organic matter, and the blowing air strongly disturbs the biofilm and hinders the growth of the biofilm;

[0007] Fourth, the thickness of the packing bed of the biological aerated filter is about 3m, which usually requires a large bed area, resulting in an increase in floor area and investment

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