Waste gas treatment equipment advances in biological treatment of volatile organic waste gas

       Waste gas treatment equipment with the development trend of China's economic development of various industries, many manufacturing industries produce organic waste gas, hazardous sites, surface water treatment equipment and other volatile organic compounds (VOCs), which can cause photochemical pollution, damage the ecological environment protection, and have carcinogenic substances, seriously harming people's physical and mental health. Because of the development of biotechnology industry, relative technology is gradually applied to environmental protection industry. In the 1970s of the 20th century, all countries in the world scrambled to start scientific research on the biological method to solve the volatile industrial waste gas, the key scientific research on the lampblack purifier and the improvement of standards, the training and shaping of the advantages of beneficial bacteria, the basic principle of metabolism and the whole process of dissolution, and the analysis of dynamic models. Compared with the traditional method, the biological method has the advantages of easy practical operation, convenient maintenance, high efficiency of cleaning, low operating cost, high safety factor and small secondary pollution. In the undergraduate study, the basic principles and research progress of VOCs cleaning processing technology for three kinds of organisms were discussed in detail, and the deficiencies and development trend of this industry were clearly pointed out.

Biological method to solve the basic theory of VOCs organic waste gas

Biological method to solve the VOCs ancient principle of organic waste gases has done a lot of scientific research, global more fashionable is put forward by the French historian clear "digestion and absorption - organisms" basic theory: the organic waste gas by water absorb VOCs, in under the effect of external diffusion into the concentration gradient to the organism, which is dissolved with microbial strains touch digestion and absorption, the air pollutants by the metabolism into simple small molecule chemicals water, CO2 and H2O. Pei-shi sun later in the ancients basically sound, such as for waste gas of low concentration of VOCs in the solution of the clear put forward a theory of the new "adsorption - biology", pay attention to air pollutants by the diffusion of foreign immediately surface adsorption in organisms, and touch the been dissolved digestion, absorption and microbial strains, air pollutants as electric energy and nutrient elements was microbial strains, finally converted to simple small molecule chemicals water, CO2 and H2O. The key lies in the whole process of absorption and dissolution, which has improved and adjusted the basic theory of overseas, and demonstrated whether overseas scholars have questioned the existence of liquid film.

　　Treatment of industrial waste gas by microbial strain method

　　VOCs organic waste gas biological solution technology

Biological method to solve the kitchen lampblack organic waste gas is the key to organic waste gas migration from vapor state to the liquid or solid on the surface of the liquid membrane, using the basal metabolism of microorganism strains efficacy to dissolve change for no harm of inorganic compounds (CO2, H2O), organic small molecules of water and its precursors chemicals, organic waste gas so that the kitchen lampblack is enough to clean, the whole process is known as shown in figure 1. With traditional exhaust governance more technical physics, biological method of cleaning technical has convenient use, easy maintenance, project investment, low operating cost, good safety factor, solve the features such as high efficiency, no secondary pollution, very clean in low concentration, the organism can be more prominent in degradation of organic waste gas with good sex.

At present, the key technologies for cleaning organic waste gas are biological filter, biological filter tower and biological wet dust collector equipment. The equipment is shown in table 1.

Biological filter

Biological filter to solve organic exhaust gas is according to the filter to remove fine particulate matter in the exhaust, and then through the runner temperature except ShiKong junior to add filling with adsorption filter bag in the biological filter, according to the biological packing layer, air pollution by organic waste gases and oxygen from the liquid spread out to the contraction of plasmid vector surface water, organic compounds as carbon source by microbial strains, kinetic energy, air oxidation break down for no harm simple organic compounds, H2O and CO2, etc. See amount of microorganism strains in solving the VOCs in the whole process of organic waste gas plays a particularly important influence, biological filter can well solve the monocyclic aromatic hydrocarbons, alcohols, amino sulfonic acid salt, aldehyde, ketone, esters, such as waste gas of VOCs, its production process is shown in figure 2 icon known, biological filter for equivalent concentration is less than 1000 mg/m3 of VOCs waste treatment, and have no water, machinery and equipment simple practical, organisms stationary packing density is big, the advantages of small secondary pollution. However, since the total area of the filter is large, the expansion of the density value of the cultivated substrate will immediately lead to the rapid breeding of microbial species and block the filter bag, thus jeopardizing the actual effect of convective heat transfer.