Bacteria Selection, Packing Modification, Kinetic Analysis Of Biotrickling Filter Purified H₂S

The effectiveness of biological trickling filter treatment malodorous gases, due to packing, microbiology, nutrition, target pollutants and other factors has been used on several natural gas processing was the hot spot of air pollution control. Dominant bacterium and their metabolism characteristics, packing performance and modification process, was investigated for making an innovative biological trickling filter emissions from industrial. Parameters proposed and corresponding kinetic analysis characteristics are listed to illustrate the biotrickling filter degradation mechanism. The main results were showed as follows:(1) Screening six desulphurization bacterium from soil and wastewater from sulfuric acid factory, coking plant wastewater, activated sludge from the treatment plant and starch factory wastewater. Two strains of bacteria as a biological trickling filter biofilm are: organic heterotrophic bacteria Xanthomonas sp2 (X2), organic nutrients Bacillaceae sp2 (B2) were selected by multiple comparative experiments. Culture medium and culture conditions of (B2, X2) mixed bacteria were identified, including pH, the greatest influence on bacteria growth.(2) FeCl3 solution as modifier, calcinations temperature 400℃, roasting time 3 hours, modifier concentration of 1.5mol/L modified ceramic manufacturing. Modified ceramic, surface roughness increases, the porosity increases 6.2%, PI increase 4 times. With the modified ceramic as filler packing, hanging membrane time shortens1/3, biomass increased by 16%,and which has high H₂S removal capacity than ceramic biotrickling filter, especially, when the inlet concentration range of 1200⁴500 mg/m3, this advantage is more obvious mean of 95%, 9% higher than that of unmodified.(3) Selected medium glucose as C source to get higher (B2, X2) mixed-species dominance, better removal of H₂S. (4) EPS secretion and its component changes are the reaction of bacterium and environment. The polysaccharide components in EPS are in more protect water, and the components of bond other micro-organisms, while protein should be the enzyme. Temperature was a significant effect on. The protein content of EPS Changed can be very good response in vitro enzyme changed.(5) In the process of degradation Heterotrophic bacteria used H₂S as energy sources, and compounded cell material at their life activity cycles at the same time, while transformed sulfide into S0 state which is creature biological sulfur polymer. The yellow particles of metabolites precipitated at the bottom of the circulation liquid trough by spraying circulation liquid elution.(6) Parameters proposed and corresponding kinetic analysis characteristics are listed to illustrate the biotrickling filter degradation mechanism.