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Sulfur Oxidizing Bacterial Biofilter for Removal of Hydrogen Sulfide ( H 2 S ) from Biogas
| Content Provider | Semantic Scholar |
|---|---|
| Author | Rujisangvittaya, Kawin Phoolphundh, Sivawan |
| Copyright Year | 2016 |
| Abstract | Presence of hydrogen sulfide (H2S) in biogas is a major problem for biogas utilization due to its corrosive property. H2S contamination can be removed by chemical and physical methods but both of them have high capital costs and demand large energy inputs. The biological process e.g. Biofilter can change biogas into noncorrosive form. Pollutants (e.g. H2S) are utilized by biofilm of microorganisms grown on packing material when contaminated gases stream pass through the filter bed. Many types of microorganisms, either autotrophic or heterotrophic, are capable of utilizing hydrogen sulfide for their growth. Sulfur oxidizing bacteria (SOB) convert hydrogen sulfide (H2S) into elemental sulfur (S0) by partial oxidation, or sulfate (SO4 ). Besides H2S, other sulfur compounds like thiosulfate (S2O3 ) and tetrathionate (S4O6 ) can also be converted to sulfate. In this study, Sulfur oxidizing bacteria isolated from Fang hot-spring in Chaingmai province, from a bio-scrubber tank of cassava starch wastewater treatment plant at Saraburi province and mixed culture of bio-scrubber effluent and hot-spring bacterial biofilm were determined for their hydrogen sulfide removal efficiency in the biofilter (PVC pipe; diameter 0.2 m, height 1.5 m) packed with plastic bio-ball (6.29 m surface area). Each biofilter was continuously fed with real biogas (H2S concentration ~ 2,000-3,000 ppm) at the bottom with the flow rate of 0.6 m/h. Minerals medium was sprayed from a nozzle at the top of biofilter. Hydrogen sulfide concentration from biogas inlet and outlet was monitoring every 4 hours over 3 days and used to calculate the removal efficiency (%). The results showed that biofilter inoculated with hot-spring bacterial biofilm and bio-scrubber effluent biofilm had hydrogen sulfide removal efficiency of more than 75 and 80 %, respectively. A hydrogen sulfide removal efficiency of more than 85% was achieved when mixture of two bacterial |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.jgsee.kmutt.ac.th/jsee/JSEE%202015/JSEE%206(3)/Sulfur%20Oxidizing%20Bacterial%20pp.%2071-74.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
