Anaerobic Co-Digestion of Vinasse and Pentose Liquor and the Role of Micronutrients in Methane Production within Sugarcane Biorefineries
Anaerobic digestion (AD) of residues from integrated first- and second-generation ethanol (1G2G) biorefineries is a sustainable method for energy recovery through biogas production. This study evaluated the co-digestion of 1G vinasse, 2G vinasse and pentose liquor (from the pretreatment of sugarcane...
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| Format: | Article |
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MDPI AG
2023-12-01
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| Series: | Methane |
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| Online Access: | https://www.mdpi.com/2674-0389/2/4/29 |
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| author | Gabriela P. Freitas Brenno Vinicius M. Lima Maria Paula C. Volpi Renata P. Rodriguez Bruna S. Moraes |
| author_facet | Gabriela P. Freitas Brenno Vinicius M. Lima Maria Paula C. Volpi Renata P. Rodriguez Bruna S. Moraes |
| author_sort | Gabriela P. Freitas |
| collection | DOAJ |
| description | Anaerobic digestion (AD) of residues from integrated first- and second-generation ethanol (1G2G) biorefineries is a sustainable method for energy recovery through biogas production. This study evaluated the co-digestion of 1G vinasse, 2G vinasse and pentose liquor (from the pretreatment of sugarcane bagasse for 2G ethanol production) compared to individual digestions using biochemical methane potential (BMP) assays. The results showed some “key” micronutrients from the substrates that affected methane (CH<sub>4</sub>) production, while their balance provided by co-digestion achieved high digestibility (95%). High iron (Fe) and nickel (Ni) concentrations, in addition to furfural (0.33 g L<sup>−1</sup>) in pentose liquor seemed to decrease its CH<sub>4</sub> production potential. Despite these adverse effects observed in mono-digestion, co-digestion was beneficial for this substrate, increasing digestibility (52%) and BMP (118%). The highest BMP was observed in vinasse 2G (631 ± 6 NmL CH<sub>4</sub> gTVS<sup>−1</sup>), with no significant difference compared to the adjusted modified Gompertz model (624 ± 10 NmL CH<sub>4</sub> gTVS<sup>−1</sup>). The co-digestion system also presented the highest specific CH<sub>4</sub> production rate (20 ± 1 NmL CH<sub>4</sub> gTVS<sup>−1</sup>day<sup>−1</sup>) and shortened the lag phase by 19% compared to the AD of isolated 1G vinasse with the second lowest BMP value (494 ± 11 NmL CH<sub>4</sub> gTVS<sup>−1</sup>). |
| first_indexed | 2024-03-08T20:32:11Z |
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| institution | Directory Open Access Journal |
| issn | 2674-0389 |
| language | English |
| last_indexed | 2024-03-08T20:32:11Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Methane |
| spelling | doaj.art-b310daa6550e43169f36f11eb2ab279b2023-12-22T14:24:57ZengMDPI AGMethane2674-03892023-12-012442643910.3390/methane2040029Anaerobic Co-Digestion of Vinasse and Pentose Liquor and the Role of Micronutrients in Methane Production within Sugarcane BiorefineriesGabriela P. Freitas0Brenno Vinicius M. Lima1Maria Paula C. Volpi2Renata P. Rodriguez3Bruna S. Moraes4Center for Energy Planning, University of Campinas (NIPE/UNICAMP), R. Cora Coralina, 330—Cidade Universitária, Campinas 13083-896, SP, BrazilCenter for Energy Planning, University of Campinas (NIPE/UNICAMP), R. Cora Coralina, 330—Cidade Universitária, Campinas 13083-896, SP, BrazilCenter for Energy Planning, University of Campinas (NIPE/UNICAMP), R. Cora Coralina, 330—Cidade Universitária, Campinas 13083-896, SP, BrazilLaboratory of Anaerobic Biotechnology—Science and Technology Institute, Federal University of Alfenas (UNIFAL-MG), José Aurélio Vilela Road, BR 267, km 533, 11999, Poços de Caldas 37715-400, MG, BrazilCenter for Energy Planning, University of Campinas (NIPE/UNICAMP), R. Cora Coralina, 330—Cidade Universitária, Campinas 13083-896, SP, BrazilAnaerobic digestion (AD) of residues from integrated first- and second-generation ethanol (1G2G) biorefineries is a sustainable method for energy recovery through biogas production. This study evaluated the co-digestion of 1G vinasse, 2G vinasse and pentose liquor (from the pretreatment of sugarcane bagasse for 2G ethanol production) compared to individual digestions using biochemical methane potential (BMP) assays. The results showed some “key” micronutrients from the substrates that affected methane (CH<sub>4</sub>) production, while their balance provided by co-digestion achieved high digestibility (95%). High iron (Fe) and nickel (Ni) concentrations, in addition to furfural (0.33 g L<sup>−1</sup>) in pentose liquor seemed to decrease its CH<sub>4</sub> production potential. Despite these adverse effects observed in mono-digestion, co-digestion was beneficial for this substrate, increasing digestibility (52%) and BMP (118%). The highest BMP was observed in vinasse 2G (631 ± 6 NmL CH<sub>4</sub> gTVS<sup>−1</sup>), with no significant difference compared to the adjusted modified Gompertz model (624 ± 10 NmL CH<sub>4</sub> gTVS<sup>−1</sup>). The co-digestion system also presented the highest specific CH<sub>4</sub> production rate (20 ± 1 NmL CH<sub>4</sub> gTVS<sup>−1</sup>day<sup>−1</sup>) and shortened the lag phase by 19% compared to the AD of isolated 1G vinasse with the second lowest BMP value (494 ± 11 NmL CH<sub>4</sub> gTVS<sup>−1</sup>).https://www.mdpi.com/2674-0389/2/4/29biogaswaste-to-energybiochemical methane potential (BMP) |
| spellingShingle | Gabriela P. Freitas Brenno Vinicius M. Lima Maria Paula C. Volpi Renata P. Rodriguez Bruna S. Moraes Anaerobic Co-Digestion of Vinasse and Pentose Liquor and the Role of Micronutrients in Methane Production within Sugarcane Biorefineries Methane biogas waste-to-energy biochemical methane potential (BMP) |
| title | Anaerobic Co-Digestion of Vinasse and Pentose Liquor and the Role of Micronutrients in Methane Production within Sugarcane Biorefineries |
| title_full | Anaerobic Co-Digestion of Vinasse and Pentose Liquor and the Role of Micronutrients in Methane Production within Sugarcane Biorefineries |
| title_fullStr | Anaerobic Co-Digestion of Vinasse and Pentose Liquor and the Role of Micronutrients in Methane Production within Sugarcane Biorefineries |
| title_full_unstemmed | Anaerobic Co-Digestion of Vinasse and Pentose Liquor and the Role of Micronutrients in Methane Production within Sugarcane Biorefineries |
| title_short | Anaerobic Co-Digestion of Vinasse and Pentose Liquor and the Role of Micronutrients in Methane Production within Sugarcane Biorefineries |
| title_sort | anaerobic co digestion of vinasse and pentose liquor and the role of micronutrients in methane production within sugarcane biorefineries |
| topic | biogas waste-to-energy biochemical methane potential (BMP) |
| url | https://www.mdpi.com/2674-0389/2/4/29 |
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