Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Sulphate bioreduction for the treatment of polluted waters: Solid versus liquid organic substrates |
| Abstract | Background: In this study a comparison between two continuously operating fixed-bed column systems was performed in order to select the best operating conditions in terms of organic sources for sulphate reducing bacteria (SRB). The first column system (solid substrate, SS) was filled with a solid reactive mixture containing the organic matter necessary for SRB growth, while the second one (liquid substrate, LS) was filled with inert material and continuously fed by ethanol. Results: In the SS column 50 ± 10% sulphate abatement was reached at steady state, while metals were totally removed. Blank tests showed that biosorption was mainly responsible for both sulphate and metal removal. In the LS column, sulphate abatementwas 70±10%at steady state against 10±5%of an identical columnwithout inoculum (blank liquid substrate, BLS). Comparison with BLS showed that the main mechanism operating in this system was bioprecipitation. Estimated degradation rate constants for both SS and LS columns indicate similar performances (0.008±0.001 and 0.0085±0.0005 d-1 for SS and LS, respectively). Conclusions: LS column systems offer a valid alternative to conventional SS systems, avoiding the use of potentially harmful wastes as organic sources for SRB metabolism. |
| Source | Journal of chemical technology and biotechnology (1986) 84 (6), pp. 859–863 |
| Keywords | BioprecipitationColumn experimentsDegradation rate constantsEthanolSulphate-reducing bacteria |
| Journal | Journal of chemical technology and biotechnology (1986) |
| Editor | Published for the Society of Chemical Industry by Blackwell Scientific Publications,, Oxford [Oxfordshire], Regno Unito |
| Year | 2009 |
| Type | Articolo in rivista |
| DOI | 10.1002/jctb.2168 |
| Authors | Cruz Viggi, Carolina; Pagnanelli, Francesca; Toro, Luigi |
| Text | 378962 2009 10.1002/jctb.2168 Scopus 2 s2.0 67649215443 Bioprecipitation Column experiments Degradation rate constants Ethanol Sulphate reducing bacteria Sulphate bioreduction for the treatment of polluted waters Solid versus liquid organic substrates Cruz Viggi, Carolina; Pagnanelli, Francesca; Toro, Luigi Universita degli Studi di Roma La Sapienza Background In this study a comparison between two continuously operating fixed bed column systems was performed in order to select the best operating conditions in terms of organic sources for sulphate reducing bacteria SRB . The first column system solid substrate, SS was filled with a solid reactive mixture containing the organic matter necessary for SRB growth, while the second one liquid substrate, LS was filled with inert material and continuously fed by ethanol. Results In the SS column 50 ± 10% sulphate abatement was reached at steady state, while metals were totally removed. Blank tests showed that biosorption was mainly responsible for both sulphate and metal removal. In the LS column, sulphate abatementwas 70±10%at steady state against 10±5%of an identical columnwithout inoculum blank liquid substrate, BLS . Comparison with BLS showed that the main mechanism operating in this system was bioprecipitation. Estimated degradation rate constants for both SS and LS columns indicate similar performances 0.008±0.001 and 0.0085±0.0005 d 1 for SS and LS, respectively . Conclusions LS column systems offer a valid alternative to conventional SS systems, avoiding the use of potentially harmful wastes as organic sources for SRB metabolism. 84 Published version http //www.scopus.com/record/display.url eid=2 s2.0 67649215443 origin=inward Articolo in rivista Published for the Society of Chemical Industry by Blackwell Scientific Publications, 0268 2575 Journal of chemical technology and biotechnology 1986 Journal of chemical technology and biotechnology 1986 J. chem. technol. biotechnol. 1986 Journal of chemical technology and biotechnology. 1986 carolina.cruzviggi CRUZ VIGGI CAROLINA |