Bioaugmentation With Hydrogen Utilizers for Anaerobic Digester Recovery
Authors: Schauer-Gimenez, Anne E.; Maki, James S.; Struble, Craig A.; Zitomer, Daniel H.
Source: Proceedings of the Water Environment Federation, WEFTEC 2009: Session 11 through Session 20 , pp. 632-640(9)
Publisher: Water Environment Federation
Abstract:Bioaugmentation, adding specific microorganisms or mixed cultures to enhance an activity, has been previously used to augment nitrification and removal of specific organics. This study was completed to determine if bioaugmentation would improve recovery (through increased chemical oxygen demand (COD) removal, volatile fatty acid (VFA) reduction, and methane (CH4) production) of anaerobic digesters that were exposed to a model toxicant (oxygen). It was desired to critically observe anaerobic bioaugmentation to test the approach on a statistically valid basis. Two sets of duplicate anaerobic digesters were operated: one set was bioaugmented with an active hydrogen-utilizing enrichment culture, whereas the other digester set received an abiotic version of the enrichment culture that had been inactivated by autoclaving (control). The effluent soluble COD (SCOD) concentration in the bioaugmented digesters decreased below 1000 mg/L within 3 months, whereas that of the control digesters never decreased below this level during the 5 months of observation. Also, a 47% increase in CH4 production occurred in the bioaugmented set versus the control set approximately three months after exposure. Therefore, bioaugmentation using the mixed culture did statistically aid in recovery of the anaerobic digesters that were subjected to a toxicant.
Document Type: Research Article
Publication date: January 1, 2009
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- ingentaconnect is not responsible for the content or availability of external websites