Journal
WASTE MANAGEMENT
Volume 67, Issue -, Pages 51-58Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2017.05.028
Keywords
Anaerobic digestion; Slaughterhouse waste; Operation; Long chain fatty acids
Categories
Funding
- CONACyT
- NSERC
- Centre de Recherche Industrielle du Quebec
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A detailed study of a solid slaughterhouse waste (SHW) anaerobic treatment is presented. The waste used in this study is rich in lipids and proteins residue. Long chain fatty acids (LCFA), coming from the hydrolysis of lipids were inhibitory to anaerobic processes at different degrees. Acetogenesis and methanogenesis processes were mainly affected by inhibition whereas disintegration and hydrolysis processes did not seem to be affected by high LCFA concentrations. Nevertheless, because of the high energy content, this kind of waste is very suitable for anaerobic digestion but strict control of operating conditions is required to prevent inhibition. For that, two inhibition indicators were identified in this study. Those two indicators, LCFA dynamics and LCFANSbionms ratio proved to be useful to predict and to estimate the process inhibition degree. (C)2017 Elsevier Ltd. All rights reserved.
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