A fully mixed mbbr reactor

Abstract

The invention discloses a full-mixing MBBR aerobic reactor. The full-mixing MBBR aerobic reactor has a good mass transfer effect and a highly-efficient and stable treatment effect. The full-mixing MBBR aerobic reactor comprises a cylindrical shell and a gas-liquid separation tank, the cylindrical shell is formed by an outer cylindrical shell and inner flow guiding cylinders, two ends of the inner flow guiding cylinders are open, a gas collecting hood and a gas stripping tube are arranged in every inner flow guiding cylinder, the gas collecting hoods are connected with the gas-liquid separation tank arranged at the upper part of the cylindrical shell through the gas stripping tubes, baffle plates are arranged below the gas collecting hoods, the baffle plates are fixed on the inner walls of the inner flow guiding cylinders, flow guiding seams are arranged between the baffle plates and the gas collecting hoods, an aeration system is arranged at the middle of the shell of every inner flow guiding cylinder, and a water distributor is arranged just below the inner flow guiding cylinders to realize entrance of water to the bottom and annular uniform water distribution; the gas-liquid separation tank is provided with a gas outlet and water falling tubes, the upper ends of the water falling tubes communicate with the gas-liquid separation tank, and the bottoms of the water falling tubes are connected to the lower part of the outer cylindrical shell; and the upper part of the outer cylindrical shell is provided with a precipitating and filtering area, a filler layer is arranged in the precipitating and filtering area, a water outlet weir is arranged surrounding the filler layer, the water outlet weir is provided with water outlets, and the bottom of the outer cylindrical shell is provided with a mud outlet.

Description

technical field [0001] The invention relates to a reactor, in particular to a fully mixed MBBR reactor. Background technique [0002] With the development of my country's industry, the discharge of industrial wastewater is increasing day by day. After the industrial wastewater that does not meet the discharge standards is discharged into the water body, it will pollute the surface water and groundwater. After the water body is polluted, various environmental problems follow. Biological technology is one of the main technologies of sewage treatment, in which aerobic treatment method is to use aerobic microorganisms (including facultative microorganisms) to carry out biological metabolism in the presence of oxygen to degrade organic matter, making it stable and harmless. It is one of the main methods of biological sewage treatment. [0003] The main treatment technologies for sewage at this stage include: A / O, SBR, CASS, etc. The purpose is to remove organic pollutants, nitr...

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Problems solved by technology

These technologies occupy a large area, have a long construction period, require large investment, and have complex operation and management, making it difficult to adapt to high-concentration organic wastewater.

[0004] The aerobic reactors of various structural forms used in the prior art when treating wastewater use air as the power for mud-water mixing in the reactor, and the entire reaction process consumes a lot of power

[0005] The traditional aerobic reactor only uses air as the driving force for the mixing of activated sludge and sewage in the reactor. When the concentration of activated sludge is high, the activated sludge will be suspended on the surface of the sewage and flow out with the water, so the traditional aerobic reactor The concentration of activated sludge is generally about 3000mg / L, the sludge concentration per unit volume is low, the organic load is low, and the treatment effect is not good; the low organic load will lead to the treatment of wastewater with high organic concentration, and the volume of the entire reactor will increase. Construction Increased investment

[0006] The height of the aerator in the traditional aerobic reactor from the liquid surface in the tank is 3000-5000mm. Due to the relatively high static pressure of the water, coupled with the pressure loss of the aeration pipeline and the aerator, the power of the aeration fan is large and the aeration High gas consumption

There are also some related studies on aerobic reactors. For example, the Chinese patent No. 201520258685.X discloses an aerobic reactor, which has a limited effect of uniform mixing of mud and water inside, and the drainage process will lead to the loss of part of the sludge. Therefore, It is imperative to research and develop new, efficient and stable reactors for the treatment of high-concentration industrial wastewater

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