Biological membrane biochemical reaction system based on ozone and wastewater purifying process

Abstract

The invention belongs to the field of wastewater processing, and particularly relates to a biological membrane biochemical reaction system based on ozone and a wastewater purifying process. The biological membrane biochemical reaction system comprises an ozone reactor for purifying wastewater through the ozone, an oxygen-rich aeration biological membrane biochemical reactor communicated with an ozone generator and used for deeply purifying and discharging the purified waste, and an ozone decomposition reactor communicated with the ozone generator, the oxygen-rich aeration biological membrane biochemical reactor and used for decomposing the ozone passing through the ozone reactor but not completely reacting into oxygen. The low-energy-consumption, high-efficiency and economical wastewater deep purifying process is provided, and the ozone catalytic oxidization is fixedly connected with the biological membrane biochemical reactor in series. The wastewater can be purified for up-to-standard discharging under the low energy consumption.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to an ozone-based biofilm biochemical reaction system, wastewater purification and process for advanced treatment of organic wastewater. Background technique [0002] In order to cope with the deteriorating ecological environment, the country continues to promulgate stricter environmental protection standards, and the requirements for sewage treatment are also constantly increasing. With the rapid development of industry, the volume of industrial wastewater is increasing, and the components are becoming more and more complex. The difficulty of treatment is also increasing, especially the treatment of those refractory organics or organic pollutants that are toxic to organisms has attracted great attention, but these organic pollutants are not only difficult to biodegrade, but also difficult to use general Oxidant removal by oxidation. [0003] In order to achieve the ...

AI Technical Summary

Problems solved by technology

For example, channel flow and wall flow phenomenon occur in the ozone reactor, resulting in low ozone utilization rate and poor treatment effect; tail gas ozone destroyer needs high temperature heating to effectively destroy ozone, and the energy consumption is high; the oxygen in the tail gas after ozone decomposition (tail Oxygen) content is still as high as more than 80%, because it is harmless and basically all directly discharged into the atmosphere, thereby causing a large amount of waste of energy

[0005] 2) Ozone catalytic oxidation is not complete for the oxidation of refractory organic matter, and it is difficult to further oxidize the oxidized small molecular substances, so pure ozone catalytic oxidation has certain limitations for the treatment of organic matter

[0006] Patent CN201620061049.2 proposes a two-stage ozone catalytic oxidation wastewater treatment device. After the first-stage ozone catalytic oxidation, the wastewater enters the second-stage ozone catalytic oxidation. After the ozone tail gas is destroyed, it is directly discharged into the atmosphere. Although this method improves the waste water The degree of treatment of medium organic pollutants, but it cannot solve the problem of low ozone utilization rate, and the oxygen consumption and equipment investment cost are high

[0007] In order to solve the problem of ozone tail gas utilization, the patent CN205603366U proposes to destroy the ozone tail gas from catalytic oxidation of ozone and return it to the upstream biochemical reactor for recovery. Although this method reduces the aeration rate of the upstream biochemical reaction and reduces power consumption, it does not Can not solve the problem of treatment of small molecule organic matter in wastewater after ozone catalytic oxidation

Images