Simultaneous removal of siloxanes and HS from biogas using an aerobic biotrickling filter.

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ID: 96782
2020
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Abstract
The feasibility of simultaneous removal of siloxane and HS from biogas was investigated using an aerobic biotrickling filter (BTF). The biodegradation of HS in the BTF followed a first-order kinetic model and more than 95 % HS was eliminated within a residence time of 0.3 min. The removal of decamethylcyclopentasiloxane (D5) increased with longer empty bed residence time (EBRT). The partition test and microbial community analysis further reveals that up to 52 % removal of D5 was reached mainly by the chemical-absorption in acid recycling liquid. Finally, D5 was converted into mixtures of dimethylsilanediol (DMSD) and hexamethyldisiloxane (L2) via ring-opening hydrolysis in acid liquid and ring-shrinking polyreaction using CH derived from biogas. These operational characteristics demonstrate that the abiotic removal of D5, in addition to biological removal of HS in an aerobic BTF can significantly decrease the siloxane loading to the downstream siloxane removing units.
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zhang2020simultaneousjournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zhang, Yuyao;Oshita, Kazuyuki;Kusakabe, Taketoshi;Takaoka, Masaki;Kawasaki, Yu;Minami, Daisuke;Tanaka, Toshihiro;
Journal Journal of hazardous materials
Year 2020
DOI
S0304-3894(20)30175-8
URL
Keywords
biogas filter decamethylcyclopentasiloxane hydrogen sulfide biotrickling siloxane

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