AI Article Synopsis
- The study explores hydrogen and poly-β-hydroxybutyrate (PHB) production from effluent of a dark fermentation reactor using municipal waste.
- Two inocula were tested: an adapted culture of Rhodobacter sphaeroides and a mixed consortium of purple non-sulfur bacteria (PNSB), with the latter producing 1.5 times more hydrogen.
- While Rhodobacter sphaeroides achieved a higher PHB productivity than the mixed culture, both methods effectively removed over 80% of dissolved chemical oxygen demand (COD).
Article Abstract
The aim of this work is to investigate the hydrogen and poly-β-hydroxybutyrate (PHB) production during the photofermentative treatment of the effluent from a dark fermentation reactor fed with the organic fraction of municipal solid waste. Two different inocula, an adapted culture of Rhodobacter sphaeroides AV1b and a mixed consortium of purple non sulphur bacteria have been investigated under the same operational conditions. Different hydrogen productivities of 364 and 559NmL H L were observed for the Rhodobacter sphaeroides and the mixed culture consortium tests, respectively: the consortium of PNSB resulted 1.5-fold more productive than the pure culture. On the other hand, Rhodobacter sphaeroides culture showed a higher PHB productivity (155mg PHB g COD) than the mixed culture (55mg PHB g COD). In all the tests, the concomitant H and PHB production was associated to a dissolved COD removal higher than 80%.
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| http://dx.doi.org/10.1016/j.biortech.2016.12.079 | DOI Listing |
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