Effect of trace element addition and increasing organic loading rates on the anaerobic digestion of cattle slaughterhouse wastewater

Schmidt, Thomas and McCabe, Bernadette and Harris, Peter and Lee, Seonmi (2018) Effect of trace element addition and increasing organic loading rates on the anaerobic digestion of cattle slaughterhouse wastewater. Bioresource Technology, 264 (September). pp. 51-57. ISSN 0960-8524

Abstract

In this study, anaerobic digestion of slaughterhouse wastewater with the addition of trace elements was monitored for biogas quantity, quality and process stability using CSTR digesters operated at mesophilic temperature. The determination of trace element concentrations was shown to be deficient in Fe, Ni, Co, Mn and Mo compared to recommendations given in the literature. Addition of these trace elements resulted in enhanced degradation efficiency, higher biogas production and improved process stability. Higher organic loading rates and lower hydraulic retention times were achieved in comparison to the control digesters. A critical accumulation of volatile fatty acids was observed at an organic loading rate of 1.82 g L–1 d–1 in the control compared to 2.36 g L–1 d–1 in the digesters with trace element addition. The improved process stability was evident in the final weeks of experimentation, in which control reactors produced 84% less biogas per day compared to the reactors containing trace elements.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Restricted access to published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 07 Jun 2018 06:35
Last Modified: 07 Jun 2018 06:35
Uncontrolled Keywords: continuous digestion; CSTR; abattoir; process stability; fats, oils and greases; red meat processing
Fields of Research : 10 Technology > 1003 Industrial Biotechnology > 100303 Fermentation
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Socio-Economic Objective: B Economic Development > 83 Animal Production and Animal Primary Products > 8398 Environmentally Sustainable Animal Production > 839899 Environmentally Sustainable Animal Production not elsewhere classified
Identification Number or DOI: 10.1016/j.biortech.2018.05.050
URI: http://eprints.usq.edu.au/id/eprint/34217

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