Use of activated carbon as a support medium for H2S biofiltration and effect of bacterial immobilization on available pore surface

Applied Microbiology and Biotechnology
Y L NgLawrence Choon Chiaw Koe

Abstract

The use of support media for the immobilization of microorganisms is widely known to provide a surface for microbial growth and a shelter that protects the microorganisms from inhibitory compounds. In this study, activated carbon is used as a support medium for the immobilization of microorganisms enriched from municipal sewage activated sludge to remove gas-phase hydrogen sulfide (H2S), a major odorous component of waste gas from sewage treatment plants. A series of designed experiments is used to examine the effect on bacteria-immobilized activated carbon (termed "biocarbon") due to physical adsorption, chemical reaction, and microbial degradation in the overall removal of H2S. H2S breakthrough tests are conducted with various samples, including microbe-immobilized carbon and Teflon discs, salts-medium-washed carbon, and ultra-pure water-washed carbon. The results show a higher removal capacity for the microbe-immobilized activated carbon compared with the activated carbon control in a batch biofilter column. The increase in removal capacity is attributed to the role played by the immobilized microorganisms in metabolizing adsorbed sulfur and sulfur compounds on the biocarbon, hence releasing the adsorption sites for further ...Continue Reading

References

Feb 6, 2002·Water Research·Wenjun WangDonghong Wang
Mar 15, 1991·Biotechnology and Bioengineering·C OngcharitY T Shah

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Citations

Jul 20, 2005·Applied Microbiology and Biotechnology·Huiqi DuanLawrence Choon Chiaw Koe
Oct 25, 2008·Applied Microbiology and Biotechnology·Zhiling LiJinping Jia
Nov 16, 2010·Journal of Hazardous Materials·Xia Jiang, Joo Hwa Tay
May 4, 2010·Genetics Research·Kim van der LindeScott J Steppan

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