Blending based optimisation and pretreatment strategies to enhance anaerobic digestion of poultry manure
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Título: | Blending based optimisation and pretreatment strategies to enhance anaerobic digestion of poultry manure |
Autor/a: | Rodríguez Verde, Iván Regueiro Abelleira, Leticia Lema Rodicio, Juan Manuel Carballa Arcos, Marta |
Centro/Departamento: | Universidade de Santiago de Compostela. Departamento de Enxeñaría Química |
Palabras chave: | Ammonia inhibition | Co-digestion | Lignocellulosic material | Livestock waste | Methane | |
Data: | 2018 |
Editor: | Elsevier |
Cita bibliográfica: | Rodriguez-Verde, I., Regueiro, L., Lema, J., & Carballa, M. (2018). Blending based optimisation and pretreatment strategies to enhance anaerobic digestion of poultry manure. Waste Management, 71, 521-531. doi: 10.1016/j.wasman.2017.11.002 |
Resumo: | Anaerobic digestion of poultry manure is limited by the excessive levels of nitrogen and the high concentration of dry matter. These limitations are usually overcome either by applying procedures to remove nitrogen or by employing pretreatments that allows to solubilise organic matter. In this work, the treatment of poultry manure was enhanced by co-digestion with pig manure through the methodological determination of optimal mixtures combined together with a thermochemical pretreatment coupled to ammonia stripping. The optimum poultry-pig mixture, resulting in a 24%:76% (volume basis) poultry-pig manure, was determined by applying a methodology based on linear programming which calculates the proportions of the blend which returns the maximum methane production while keeping a stable process. Pretreatment batch experiments, consisting of increasing both temperature and pH simultaneously with ammonia stripping process was optimised for a temperature of 90 °C and a pH of 10 resulting in a nitrogen removal efficiency of 72% and a 1.2-fold higher methane production in comparison to the unpretreated mixture. Continuous anaerobic co-digestion of pretreated optimum mixture enhanced the COD removal efficiency by 37% when compared with the treatment of unpretreated feedstock (37% vs 27%, respectively). This study indicates that combining blending optimisation of substrates, thermochemical pretreatments and ammonia stripping procedures prior to anaerobic co-digestion becomes a good strategy to overtake the limitations offered by solid- and nitrogen-rich substrates, such as poultry manure |
Descrición: | This is the accepted manuscript of the following article: Rodriguez-Verde, I., Regueiro, L., Lema, J., & Carballa, M. (2018). Blending based optimisation and pretreatment strategies to enhance anaerobic digestion of poultry manure. Waste Management, 71, 521-531. doi: 10.1016/j.wasman.2017.11.002
© 2018 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
URI: | http://hdl.handle.net/10347/17086 |
DOI: | 10.1016/j.wasman.2017.11.002 |
ISSN: | 0956-053X |
Dereitos: | © 2018 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
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