Sulfate reduction at pH 5 in a high-rate membrane bioreactor: reactor performance and microbial community analyses
2009 (English)In: Journal of Microbiology and Biotechnology, ISSN 1017-7825, E-ISSN 1738-8872, Vol. 19, no 7, 698-708 p.Article in journal (Other academic) PublishedText
High rate sulfate reduction under acidic conditions opens possibilities for new process flow sheets that allow the selective recovery of metals from mining and metallurgical waste and process water. However, knowledge about high-rate sulfate reduction under acidic conditions is limited. This paper investigates sulfate reduction in a membrane bioreactor at a controlled pH of 5. Sulfate and formate were dosed using a pH-auxostat system while formate was converted into hydrogen, which was used for sulfate reduction. Sulfide was removed from the gas phase to prevent sulfide inhibition. This study shows a high-rate sulfate-reducing bioreactor system for the first time at pH 5, with a volumetric activity of 188 mmol SO(4)(2-)/I/d and a specific activity of 81 mmol SO(4)(2-) volatile suspended solids/d. The microbial community at the end of the reactor run consisted of a diverse mixed population including sulfate-reducing bacteria.
Place, publisher, year, edition, pages
Korean Society for Microbiology and Biotechnology , 2009. Vol. 19, no 7, 698-708 p.
Sulfate reduction, membrane bioreactor, DGGE, community analysis, formate, thermodynamics
IdentifiersURN: urn:nbn:se:umu:diva-115989DOI: 10.4014/jmb.0809.502ISI: 000268452800010PubMedID: 19652518OAI: oai:DiVA.org:umu-115989DiVA: diva2:906922