Waste gas treatment device employing coupling of ultraviolet catalytic oxidation and double-layer bio-trickling filter

Abstract

The invention discloses a waste gas treatment device employing coupling of ultraviolet catalytic oxidation and a double-layer bio-trickling filter. The waste gas treatment device comprises ultraviolet catalytic oxidation equipment and double-layer bio-trickling filtration equipment, wherein an UV lamp tube and a MnOx / SiC composite photocatalyst are arranged in the ultraviolet catalytic oxidation equipment; the double-layer bio-trickling filtration equipment comprises the double-layer bio-trickling filter; a polyurethane biological flow bed and a polyurethane biological bottom bed are arranged in the bio-trickling filter at an interval along a vertical direction; and atomizing nozzles are respectively arranged above the polyurethane biological bed at the upper layer and above the polyurethane biological bed at the lower layer, and the atomizing nozzles are connected with a nutrient solution storage tank. According to the invention, pollutants in waste gas are purified through photocatalytic oxidation based on the oxidation-reduction capability of the MnOx / SiC composite photocatalyst under an illumination condition; and meanwhile, trace ozone generated by photocatalytic oxidation enters the double-layer bio-trickling filtration equipment, so the waste gas purification efficiency of microorganisms can be further improved. The device is suitable for treatment of low-flow high-concentration waste gas.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to an ultraviolet photocatalytic oxidation coupled double-layer biological trickling filter tower waste gas treatment device. Background technique [0002] Air pollution is already a nightmare for human beings, and the pollutants are divided into particulate matter and gaseous matter, and gaseous matter is divided into inorganic pollutants and organic pollutants. Among them, organic pollutants account for the vast majority, and most of them are volatile organic compounds, referred to as VOCs. Therefore, VOCs purification treatment has become a hot spot in the world. [0003] At present, the main treatment methods of VOCs can be divided into physical methods, chemical methods and biological methods. Biological method is a low-pollution technology that can replace traditional physical and chemical methods to treat VOCs. It mainly oxidizes and decomposes organic waste gas...

AI Technical Summary

Problems solved by technology

[0005] Photocatalytic oxidation technology has mild reaction conditions, low energy consumption, simple operation, and can be carried out at normal temperature and pressure. The reaction does not require complicated conditions, but photocatalytic oxidation technology has problems such as short life, electrode aging, and maintenance.

The biological trickling filtration method has the advantages of no pollution, low energy consumption, large processing capacity, and low operating costs, but there are problems such as insufficient microbial activity and excessive growth of bacteria to block the gap channels.

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