Producing hydrogen from wastewater sludge by Clostridium bifermentans
Resource
Journal of Biotechnology 102 (1): 83-92
Journal
Journal of Biotechnology
Journal Volume
102
Journal Issue
1
Pages
83-92
Date Issued
2003
Date
2003
Author(s)
Abstract
Excess wastewater sludge collected from the recycling stream of an activated sludge process is biomass that contains large quantities of polysaccharides and proteins. However, relevant literature indicates that the bio-conversion of wastewater sludge to hydrogen is limited and therefore not economically feasible. This work examined the anaerobic digestion of wastewater sludge using a clostridium strain isolated from the sludge as inoculum. A much higher hydrogen yield than presented in the literature was obtained. Also, the effects of five pre-treatments - ultrasonication, acidification, sterilization, freezing/thawing and adding methanogenic inhibitor - on the production of hydrogen were examined. Freezing and thawing and sterilization increased the specific hydrogen yield by 1.5-2.5 times to that of untreated sludge, while adding an inhibitor and ultrasonication reduced the hydrogen yield. © 2003 Elsevier Science B.V. All rights reserved.
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journal article
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