A kind of ozone catalytic oxidation and biochemical composite treatment device for reverse osmosis concentrated water and application method thereof

Abstract

The invention discloses an ozone catalytic oxidation and biochemical compound treatment device of reverse osmosis concentrated water and an application method of the ozone catalytic oxidation and biochemical compound treatment device. The ozone catalytic oxidation and biochemical compound treatment device is characterized by comprising a fixed bed catalytic oxidation tower, an empty exposure degassing tower, a fluidized bed biological membrane reactor, a blower, an ozone generator and a pipeline mixer, wherein a reverse osmosis concentrated water storage tank is connected with the fixed bed catalytic oxidation tower through a first pipe line, the pipeline mixer is arranged on the first pipeline and is connected with the ozone generator, the fixed bed catalytic oxidation tower is connected with the empty exposure degassing tower through a second pipeline, the empty exposure degassing tower is connected with the fluidized bed biological membrane reactor through a third pipeline, an outlet of the fluidized bed biological membrane reactor is connected with a secondary sedimentation tank, and aeration pipes connected with the blower are respectively arranged in the fixed bed catalytic oxidation tower, the empty exposure degassing tower and the fluidized bed biological membrane reactor. According to the invention, the pH value regulation of the reverse osmosis concentrated water is not needed; because catalysts participate in the oxidation reaction, and the oxidation reaction is only controlled at the organic pollutant molecular structure destroy stage, the ozone addition quantity is small, only about 40mg / L is needed, the treatment cost is low, and the treatment cost of sewage is about 0.6Yuan / m<3>; and the method has the advantages that the secondary pollution is avoided, and the green and environment-friendly effects are realized.

Description

technical field [0001] The invention relates to the field of reverse osmosis concentrated water treatment in the process of sewage reuse, in particular to an ozone catalytic oxidation and biochemical composite treatment device for reverse osmosis concentrated water and an application method thereof. Background technique [0002] As an advanced technology in the water treatment industry, reverse osmosis membrane separation technology has the advantages of cleanliness, high efficiency and no pollution. It has been widely used in seawater desalination, brackish water purification, pure water and ultrapure water preparation, urban sewage treatment and reuse , Industrial wastewater treatment and reuse and other fields, making outstanding contributions to the water treatment industry. [0003] In the application of reverse osmosis membrane technology in urban sewage treatment and reuse, industrial wastewater treatment and reuse, it can produce 20% to 30% concentrated water while o...

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Problems solved by technology

Because the reverse osmosis influent has been treated by microorganisms and biochemically, it is difficult to biodegrade the COD in the concentrated water; while the conventional coagulation sedimentation or filtration process has basically no treatment effect; the cost of the activated carbon adsorption process is too high, which is not economical and practical; the use of hydrogen peroxide (H 2 o 2 ), chlorine dioxide (ClO 2 ), sodium hypochlorite (NaClO) and other chemical agents to oxidize, the treatment effect is good, but the pH value of concentrated water needs to be adjusted, the amount of chemical agents is large, and the treatment cost is high, reaching 1.2-1.5 yuan / m 3 Concentrated water, and the volatilization of chemical agents causes secondary pollution and other shortcomings; use ozone (O 3 ) for oxidation, the treatment effect is good, and there is no need to adjust the pH value of concentrated water, but O 3 The dosage reaches 150-200mg / L, and the treatment cost reaches 1.0-1.2 yuan / m 3 Concentrated water

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