Malodorous gases not only cause serious impact on the ecological environment, but also harm the respiratory system, circulatory system, digestive system and endocrine system, which will cause disorders and lesions of ...Malodorous gases not only cause serious impact on the ecological environment, but also harm the respiratory system, circulatory system, digestive system and endocrine system, which will cause disorders and lesions of central nervous system, make people restless, lose concentration, reduce work efficiency, reduce judgment and memory, affect nervous system, and cause chronic diseases and acute diseases. Because the components of malodorous gases are too complex, the treatment is difficult. At present, the main deodorization techniques can be divided into physical, chemical and biological methods. The principle of the treatment technique is to change the molecular structure or existing state of malodorous gases to eliminate malodor. In the actual industrial production process, the malodorous gas treatment methods include combustion method, oxidation method, absorption method, adsorption method, neutralization method and biological method. Bio-trickling filtration is one of the biological methods. It takes into account the biological deodorization technology of both biological filter and biological washing tank. The malodorous gases enter the bio-trickling filter after pre-treatment such as condensation, gas-liquid separation and oxidation. When malodorous gas passes through the packing layer with biomembranes, malodorous substances in the gas are absorbed by the circulating liquid, and the circulating liquid and microorganisms attached on the surface of the packing are adsorbed and absorbed, so as to achieve the purpose of eliminating and purifying the malodorous gas. The common process in the biological method can effectively decompose various malodorous components, and has the advantages of low operation cost, strong safety, simple operation and the like. The application of biotechnology in the treatment of malodorous gases is studied and analyzed in this paper.展开更多
文摘Malodorous gases not only cause serious impact on the ecological environment, but also harm the respiratory system, circulatory system, digestive system and endocrine system, which will cause disorders and lesions of central nervous system, make people restless, lose concentration, reduce work efficiency, reduce judgment and memory, affect nervous system, and cause chronic diseases and acute diseases. Because the components of malodorous gases are too complex, the treatment is difficult. At present, the main deodorization techniques can be divided into physical, chemical and biological methods. The principle of the treatment technique is to change the molecular structure or existing state of malodorous gases to eliminate malodor. In the actual industrial production process, the malodorous gas treatment methods include combustion method, oxidation method, absorption method, adsorption method, neutralization method and biological method. Bio-trickling filtration is one of the biological methods. It takes into account the biological deodorization technology of both biological filter and biological washing tank. The malodorous gases enter the bio-trickling filter after pre-treatment such as condensation, gas-liquid separation and oxidation. When malodorous gas passes through the packing layer with biomembranes, malodorous substances in the gas are absorbed by the circulating liquid, and the circulating liquid and microorganisms attached on the surface of the packing are adsorbed and absorbed, so as to achieve the purpose of eliminating and purifying the malodorous gas. The common process in the biological method can effectively decompose various malodorous components, and has the advantages of low operation cost, strong safety, simple operation and the like. The application of biotechnology in the treatment of malodorous gases is studied and analyzed in this paper.
