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

Article


Schmidt, Thomas, McCabe, Bernadette, 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. https://doi.org/10.1016/j.biortech.2018.05.050
Article Title

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

ERA Journal ID3454
Article CategoryArticle
AuthorsSchmidt, Thomas (Author), McCabe, Bernadette (Author), Harris, Peter (Author) and Lee, Seonmi (Author)
Journal TitleBioresource Technology
Journal Citation264 (September), pp. 51-57
Number of Pages7
Year2018
PublisherElsevier
Place of PublicationNetherlands
ISSN0960-8524
1873-2976
Digital Object Identifier (DOI)https://doi.org/10.1016/j.biortech.2018.05.050
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0960852418307107
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.

Keywordscontinuous digestion; CSTR; abattoir; process stability; fats, oils and greases; red meat processing
ANZSRC Field of Research 2020310603. Fermentation
401102. Environmentally sustainable engineering
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Byline AffiliationsNational Centre for Engineering in Agriculture
Institution of OriginUniversity of Southern Queensland
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