Combined wastewater treatment method through visible light catalysis and immobilized microorganisms and combined reactor

Abstract

The invention discloses a combined wastewater treatment method through visible light catalysis and immobilized microorganisms. The combined wastewater treatment method comprises the following steps: treating wastewater through photocatalytic degradation; after photocatalytic degradation, flowing into an immobilized microorganism fluidized bed for subsequent biochemical treatment; further degrading and removing pollutants from wastewater; repeatedly performing combined treatment of the photocatalytic degradation and the biochemical treatment of the immobilized microorganism fluidized bed on the biochemically treated wastewater to realize the circulating and deep wastewater treatment for several times; finally, enabling the treated wastewater to reach recycle standards. The invention further provides a combined reactor for combined wastewater treatment through the visible light catalysis and the immobilized microorganisms. A swash-plate photocatalytic reactor and a swash-plate immobilized microorganism fluidized bed are arranged inside a reaction chamber of the combined reactor. The photocatalytic degradation under the visible light condition is combined with the immobilized microorganism fluidized bed, so that the operation is simple, the treatment efficiency of washing and dyeing wastewater is high, the cost is low, and the combined wastewater treatment method and the combined reactor are applicable to industrial production.

Description

technical field [0001] The invention relates to a method and equipment for degrading pollutants in wastewater, in particular to a photocatalytic degradation method and device thereof, which are applied in the technical field of comprehensive environmental pollution control, and are especially suitable for the treatment of deeply polluted washing and dyeing wastewater. Background technique [0002] Washing and dyeing wastewater is a large amount of sewage that has appeared in recent years. The wastewater has a large amount and dark color. The pollutant components in the wastewater are complex and the water quality changes greatly. It generally contains organic and inorganic pollutants such as dyes, detergents, and softeners. The traditional physicochemical and biochemical combined treatment process commonly used in China's washing and dyeing industry, the effluent water quality is difficult to meet the reuse standard, if the washing and dyeing wastewater is reused after advanc...

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Problems solved by technology

The traditional physicochemical and biochemical combined treatment process commonly used in China's washing and dyeing industry, the effluent water quality is difficult to meet the reuse standard, if the washing and dyeing wastewater is reused after advanced treatment after the effluent of the traditional process, the cost of activated carbon adsorption treatment is high , and the regeneration is difficult. If the membrane separation technology is used, the one-time investment is large, the technical difficulty is large, the cleaning of the membrane system is difficult, the amount of water required for backwashing is large, and the operating cost is high, the daily operation is complicated, and the operation and maintenance costs are high. If electrolysis is used However, there are problems such as high energy consumption, unstable operation, difficulty in engineering application, and difficulty in combining with traditional processes.

The near-photocatalytic oxidation method has a fast degradation rate, no secondary pollution, and mild reaction conditions. However, the titanium oxide photocatalyst needs to use ultraviolet light as energy and consumes a lot of energy. At the same time, the recovery rate of the photocatalyst is low, which limits the photocatalytic oxidation method. application in material handling

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