BAF treatment device and treatment process capable of realizing micro-nano aeration

Abstract

The invention discloses a BAF treatment device and treatment process capable of realizing micro-nano aeration. The BAF treatment device comprises a BAF unit, a micro-nano bubble generating unit and abackwashing unit. The BAF unit comprises a sewage feed pump, a BAF reaction tank, a sewage circulation pump, and a basket filter. The micro-nano bubble generating unit comprises a micro-nano bubble generating unit shell, a nanometer ceramic film tube, a fluid flowmeter, a gas rotameter, a gas pressure gauge, and a gas control valve. According to the invention, the BAF unit and the micro-nano bubble generating unit are integrated into one, so the treatment process is different from traditional BAF aeration methods; the nanometer ceramic film tube of the invention realizes micro-nano bubble aeration and has high gas utilization rate, so gas consumption is small, the surface tumbling of the BAF reaction tank is avoided, gas retention time is long, and a gas-liquid contact area is large; and sewage carrying micro-nano gas passes through a BAF bio-filler layer to supply oxygen to the BAF bio-filler layer, and COD in the sewage is decomposed and consumed, so COD removal efficiency is high and energy consumption is low.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a micro-nano aeration BAF treatment device and a treatment process for biochemical treatment of waste water in industries such as petroleum, chemical industry, steel, sewage plant, gas generation station, and mechanical processing. Background technique [0002] Generally, the sources of sewage requiring biochemical treatment are very wide, including petroleum, petrochemical, steel, sewage plants, gas generation stations, mechanical processing and other industries. The oxygen-consuming BAF device is a commonly used device for various sewage biochemical treatment. [0003] According to incomplete statistics, my country produces more than 3.5 billion tons of industrial sewage every year, and more than 51 billion tons of domestic sewage every year. A large amount of wastewater needs to be treated and discharged into rivers and lakes every year. Under the...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the disadvantages of large bubble size, short gas residence time, insufficient gas-liquid contact, high gas-water ratio, large tumbling and fluctuation of pool surface, and high tail gas treatment cost produced by the above-mentioned existing BAF aeration device. , to provide a micro-nano aerated BAF treatment device and treatment with small bubble size, long gas residence time, large and sufficient gas-liquid contact area, no pool surface tumbling, high COD removal efficiency, low energy consumption, and low cost craft

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