PERFORMANCE EVALUATION OF BIOFILTER IN REMOVING AMMONIA AND HYDROGEN SULFIDE GASES AT LABORATORY SCALE AS A MODEL IN INDUSTRIAL CATTEL

Background and Aim:Compound such as Ammonia and Hydrogen Sulfide are pollutant gases.Large amounts of NH3 and H2S are generated and released from industrial processes, such as metallurgy, food preparation, livestock farming, leather manufacturing, waste-water treatment and treatment of fuels.There are different methods to remove these troublesome compounds.These methods are often expensive and produce other pollutant as well.That is why ammonia and hydrogen sulfide removal in industrial are restricted.These days using biofilters has been taken into consideration by expert because of its advantages such as low cost, low energy consumption, no chemical usage and no production of contaminated by products.Methods:This research was done in 2013 at Environmental lab of Iranian Ghaza Azmaa. Biofilter cylinders are30 cm each and made of glass. Each cylinder is filled with Peat soil ,Oak ,Leaves soil ,Activated sludge of soft drink industry ,Straw ,Organic fertilizer and Shell in different arranges .After matching beds with mentioned gases ,in the final stage Ammonia and Hydrogen Sulfide gases were passed separately through the cylinder with inflow and outflow. Elimination percentage of Ammonia and Hydrogen Sulfide gases which were evaluated by Spectrophotometry methods .Results:Among the four cylinders ,the ones that were filled with Peat soil, Leaves soil and straw recorded 100% elimination in comparison with others.Conclusion:According to the results , designed filters of present study can be used as a useful model for future researches which want to investigate the elimination of Ammonia and Hydrogen Sulfide gases of industry.