Hydrogen sulfide removal in biotrickling filter system by Halothiobacillus neapolitanus

详细信息    查看全文

• 作者：Nunthaphan Vikromvarasiri^a ; Nipon Pisutpaisal^a ; ^b ; ^c ; ^{nipon.p@sci.kmutnb.ac.th" class="auth_mail" title="E-mail the corresponding author} ; ^{npp@kmutnb.ac.th" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Biogas ; Biotrickling filter ; Halothiobacillus neapolitanus ; Thiosulfate ; Hydrogen sulfide
• 刊名：International Journal of Hydrogen Energy
• 出版年：2016
• 出版时间：21 September 2016
• 年：2016
• 卷：41
• 期：35
• 页码：15682-15687
• 全文大小：639 K

文摘

Hydrogen sulfide (H₂S) in biogas, is both toxic and damaging to the environment, to the human health, and also damages machines and engines by contributing substantially towards corrosion. It can be removed from the biogas before being used by utilizing biological or physiochemical processes. A new bacterial strain of obligately chemolithoautotroph, Halothiobacillus neapolitanus NTV01 (HTN) with ability to remove H₂S from gas stream was screened, purified, and inoculated in a biotrickling filter system with counter current gas/liquid flows. Maximum sulfur oxidation activity and cell growth were found in the culture medium consisting of 10 g/L of thiosulfate and 52 mM phosphate buffer pH 7. HTN is able to tolerate higher sulfate concentrations (8.35 g/L) than reported previously. In the biotrickling filter operation with biogas fed to the system, pH appeared to be a highly important factor to affect the H₂S removal. Liquid recirculation required a fresh replacement every 48 h and controlled pH 7 to achieve the optimum performance of H₂S removal. H₂S was efficiently removed 95–100% when the initial concentration in the range of 45–255 ppmv.