Feasibility Study of Biodegradation of Gaseous Pollutants with Respect to Industrial Processes

The present study examines the feasibility of biodegradation of gaseous pollutants with respect to industrial processes. There are several methods such as physical methods, chemical methods and biological methods for removing gaseous pollutants. Combustion of fossil fuels leads to the emission of various pollutants such as SO۲, CO۲, NOx, CO, VOC, etc. These pollutants are harmful to the environment and human health. NOx and SO۲ lead to acid rain and VOC compounds cause photochemical smog and ozone layer depletion and some VOCs are carcinogenic and cause gene mutations. Common methods for reducing gaseous pollutants are wet scrubbing using lime to remove SO۲, catalytic reduction for NOx and surface adsorption to remove VOCs. All these methods are complex chemical processes and produce wastes such as wastewater, catalysts and used surface adsorbents. The results of the present study showed that using microorganisms adapted to pollutant gas, these compounds are reduced or purified in the exhaust air from the chimneys of polluting industries. The pollutant is absorbed into the liquid phase, which contains active microorganisms. This group of adapted and specialized microorganisms decompose the pollutant and use the energy from the breakdown of these compounds for their own reproduction and metabolic interactions. The product of the microbial reaction is mainly CO۲, water and biomass, in this method the pollutant can be organic or inorganic.

کلیدواژه ها:

Gaseous Pollutant ، SO۲ ، CO۲ ، NOx ، Catalytic reduction ، Microorganism