The influence of different pretreatment methods on biogas production from Jatropha curcas oil cake
| Autor: | Marek Kułażyński, Marcin Łukaszewicz, Ilona Sikora, Sławomir Jabłoński |
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| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
020209 energy Jatropha 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences chemistry.chemical_compound Bioreactors Biogas 0202 electrical engineering electronic engineering information engineering Bioreactor Animals Ammonium Waste Management and Disposal Effluent 0105 earth and related environmental sciences Biodiesel biology Waste management General Medicine biology.organism_classification Pulp and paper industry Animal Feed Anaerobic digestion chemistry Struvite Biofuels Seeds Jatropha curcas |
| Zdroj: | Journal of Environmental Management. 203:714-719 |
| ISSN: | 0301-4797 |
| DOI: | 10.1016/j.jenvman.2016.06.001 |
| Popis: | Drought and pest resistance, together with high oil content in its seeds, make Jatropha curcas a good oil source for biodiesel. Oil cake from J. curcas is not suitable for animal feeding and thus may be profitably used for additional energy production by conversion into biogas; however, the anaerobic digestion process must be optimized to obtain good efficiency. We subjected oil cake to thermal and acidic pretreatment to deactivate protease inhibitors and partially hydrolyze phytate. We then digested the samples in batch conditions to determine the effects of pretreatment on biogas production. Thermal pretreatment changed the kinetics of anaerobic digestion and reduced protease inhibitor activity and the concentration of phytate; however, biogas production efficiency was not affected (0.281 m 3 kg −1 ). To evaluate the possibility of recirculating water for SSF hydrolysis, ammonium nitrogen recovery from effluent was evaluated by its precipitation in the form of struvite (magnesium ammonium phosphate).Concentration of ammonium ions was reduced by 53% (to 980 mg L −1 ). We propose a water-saving concept based on percolation of J. curcas cake using anaerobic digestion effluent and feeding that percolate into a methanogenic bioreactor. |
| Databáze: | OpenAIRE |
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