Dilution diffusion method
Principle: the smell of gas discharged through the chimney to the atmosphere, or diluted with odorless air to reduce the concentration of odor substances to reduce the odor. Scope of application: suitable for the treatment of medium and low concentrations of organized emissions of malodorous gases. Advantages: low cost, simple equipment. Disadvantages: vulnerable to weather conditions, odor substances still exist.
Water absorption method
Principle: the use of certain substances in the odor of soluble in water characteristics, so that the composition of direct contact with the smell of water, which dissolved in water to achieve the purpose of deodorization. Scope of application: water soluble, organized emissions of malodorous gases. The utility model has the advantages of simple process, convenient management, low operating cost of the equipment and two pollution. Disadvantages: low purification efficiency, should be used in conjunction with other technologies, such as mercaptan, fatty acids, such as poor results.
Aeration activated sludge deodorization
Principle: the odor substances were dispersed into the mixed solution containing activated sludge in the form of aeration. Scope of application: as of 2013, Japan has been used for waste treatment, sewage treatment plant odor treatment. Advantages: after the domestication of activated sludge, no more than the limit load of the stench of the composition, the removal rate of more than 99.5%. Disadvantages: limited by aeration intensity, the application of this method is still limited.
Multi medium catalytic oxidation process
Principle: the reactor is packed with special solid filler, and the filler is compounded with multi media catalyst. When the malodorous gas through the filler layer under the action of the draught fan, the oxidant in solid phase and full contact surface compound through a special nozzle is a divergent spray liquid, and the catalytic effect of multi medium catalyst, malodorous gas pollution factors are fully decomposed. Scope of application: wide range of applications, especially for the treatment of large volume, high concentration of exhaust gas, a good removal of hydrophobic pollutants. The utility model has the advantages of small occupation area, low investment, low running cost and convenient management. Disadvantages: impact load, not easy to change the concentration of pollutants and temperature changes, the need to consume a certain amount of chemicals.
low temperature plasma
Low temperature plasma is the fourth state material after solid, liquid and gas, when the applied voltage reaches the breakdown voltage of gas, gas molecules are produced hybrid breakdown, including electron, ions, atoms and radicals. Although the electron temperature is very high, the temperature of the heavy particles is very low and the whole system is in low temperature. Low temperature plasma degradation of pollutants pollutants using these high-energy electrons, free radicals and particles in the waste, the pollutant molecules in a very short time decomposition, and various subsequent responses to achieve the purpose of pollutants degradation.
Low temperature plasma air purification equipment can significantly control the pollution are: VOC, malodorous gas, odor gases, fumes, dust, can also be used for disinfection. Low temperature plasma technology is a new process of purification, without any additives, does not produce waste water, waste residue, will not lead to two pollution.