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Biological sulfate reduction in a UASB reactor fed with ethanol as the electron donorстатья
Информация о цитировании статьи получена из
Scopus,
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Kalyuzhnyi S.V.a.b, De Leon Fragoso C.b., Rodriguez Martinez J.b.
- Журнал: Microbiology
- Том: 66
- Номер: 5
- Год издания: 1997
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 562
- Последняя страница: 567
- Аннотация: A process of biological reduction of sulfate was investigated using a 3.2-1 laboratory UASB reactor (35°C) with conventional anaerobic sludge and ethanol (a relatively cheap reagent) as the sole electron donor and carbon source. High sulfate-conversion efficiencies (SCE) of up to 80% were obtained at sulfate loading rates (SLR) of up to 6 g SO42-/(1 day) (hydraulic retention times (HRT), 5-0.85 days; influent sulfate concentrations, 0.84-5 g/l). Further increasing the SLR to 10 g SO42-/(1 day) caused the SCE to decrease to 60%. The SCE slightly decreased with a decrease in HRT, was almost independent of the influent sulfate concentration, and linearly increased with the increase in medium pH, i.e., with the decrease in the concentration of undissociated H2S. Thus, to reach a high SCE at a high SLR, additional measures should be taken to eliminate undissociated H2S from the reactor medium. Sulfate-reducing bacteria (SRB) won the competition with methanogens for the energy and carbon sources in this system. The predominance of SRB was continuously enhanced with time, although complete cessation of methane production was not observed even after 8 months of the experiment. It is speculated that the microbial sulfate reduction can be followed by a stripping of the H2S formed or chemical (biological) processes of further conversion of H2S to sulfur and/or sulfuric acid. © 1997 MAHK Hayka/Interperiodica Publishing.
- Добавил в систему: Калюжный Сергей Владимирович