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Biofiltration of reduced sulphur compounds and community analysis of sulphur-oxidizing bacteria |
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| Authors: | Ramírez Martín Fernández Maikel Granada Claudia Le Borgne Sylvie Gómez José Manuel Cantero Domingo |
| Institution: | a Department of Chemical Engineering and Food Technologies, Faculty of Sciences, University of Cádiz, 11510 Puerto Real, Cádiz, Spain b Study Centre of Industrial Biotechnology, Faculty of Natural Sciences, East University, 90500 Santiago de Cuba, Cuba c Department of Process and Technology, Metropolitan Autonomous University (Unit of Cuajimalpa), 01120 México D.F., Mexico |
| Abstract: | The present work aims to use a two-stage biotrickling filters for simultaneous treatment of hydrogen sulphide (H2S), methyl mercaptan (MM), dimethyl sulphide (DMS) and dimethyl disulphide (DMDS). The first biofilter was inoculated with Acidithiobacillus thiooxidans (BAT) and the second one with Thiobacillus thioparus (BTT). For separate feeds of reduced sulphur compounds (RSC), the elimination capacity (EC) order was DMDS > DMS > MM. The EC values were 9.8 gMM-S/m3/h (BTT; 78% removal efficiency (RE); empty bed residence time (EBRT) 58 s), 36 gDMDS-S/m3/h (BTT; 94.4% RE; EBRT 76 s) and 57.5 gH2S-S/m3/h (BAT; 92% RE; EBRT 59 s). For the simultaneous removal of RSC in BTT, an increase in the H2S concentration from 23 to 293 ppmv (EBRT of 59 s) inhibited the RE of DMS (97-84% RE), DMDS (86-76% RE) and MM (83-67% RE). In the two-stage biofiltration, the RE did not decrease on increasing the H2S concentration from 75 to 432 ppmv. |
| Keywords: | Biotrickling filter Reduced sulphur compounds Thiobacillus thioparus Acidithiobacillus thiooxidans Bacterial population |
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