Long-Term Evaluation of Mesophilic Semi-Continuous Anaerobic Digestion of Olive Mill Solid Waste Pretreated with Steam-Explosion
Steam-explosion is a promising technology for recovering phenolic compounds from olive mill solid waste (OMSW) due to its high impact on the structure of the fibre. Moreover, the recovery of the phenols, which are well-known microbial inhibitors, could improve the subsequent biomethanization of the...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-06-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/12/11/2222 |
| _version_ | 1798034096803282944 |
|---|---|
| author | Antonio Serrano Fernando G. Fermoso Bernabé Alonso-Fariñas Guillermo Rodríguez-Gutiérrez Sergio López Juan Fernandez-Bolaños Rafael Borja |
| author_facet | Antonio Serrano Fernando G. Fermoso Bernabé Alonso-Fariñas Guillermo Rodríguez-Gutiérrez Sergio López Juan Fernandez-Bolaños Rafael Borja |
| author_sort | Antonio Serrano |
| collection | DOAJ |
| description | Steam-explosion is a promising technology for recovering phenolic compounds from olive mill solid waste (OMSW) due to its high impact on the structure of the fibre. Moreover, the recovery of the phenols, which are well-known microbial inhibitors, could improve the subsequent biomethanization of the dephenolized OMSW to produce energy. However, there is a considerable lack of knowledge about how the remaining phenolic compounds could affect a long-term biomethanization process of steam-exploded OMSW. This work evaluated a semi-continuous mesophilic anaerobic digestion of dephenolized steam-exploited OMSW during a long operational period (275 days), assessing different organic loading rates (OLRs). The process was stable at an OLR of 1 gVS/(L·d), with a specific production rate of 163 ± 28 mL CH<sub>4</sub>/(gVS·d). However, the increment of the OLR up to 2 gVS/(L·d) resulted in total exhaust of the methane production. The increment in the propionic acid concentration up to 1486 mg/L could be the main responsible factor for the inhibition. Regardless of the OLR, the concentration of phenolic compounds was always lower than the inhibition limits. Therefore, steam-exploited OMSW could be a suitable substrate for anaerobic digestion at a suitable OLR. |
| first_indexed | 2024-04-11T20:39:37Z |
| format | Article |
| id | doaj.art-2e388c037c744aeea940e117bfaaac04 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T20:39:37Z |
| publishDate | 2019-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-2e388c037c744aeea940e117bfaaac042022-12-22T04:04:15ZengMDPI AGEnergies1996-10732019-06-011211222210.3390/en12112222en12112222Long-Term Evaluation of Mesophilic Semi-Continuous Anaerobic Digestion of Olive Mill Solid Waste Pretreated with Steam-ExplosionAntonio Serrano0Fernando G. Fermoso1Bernabé Alonso-Fariñas2Guillermo Rodríguez-Gutiérrez3Sergio López4Juan Fernandez-Bolaños5Rafael Borja6Instituto de la Grasa (CSIC), Campus Universitario Pablo de Olavide, Edificio 46, Ctra. de Utrera km 1, 41013 Sevilla, SpainInstituto de la Grasa (CSIC), Campus Universitario Pablo de Olavide, Edificio 46, Ctra. de Utrera km 1, 41013 Sevilla, SpainDepartment of Chemical and Environmental Engineering, University of Sevilla, Higher Technical School of Engineering, Camino de los Descubrimientos, s/n, 41004 Sevilla, SpainInstituto de la Grasa (CSIC), Campus Universitario Pablo de Olavide, Edificio 46, Ctra. de Utrera km 1, 41013 Sevilla, SpainInstituto de la Grasa (CSIC), Campus Universitario Pablo de Olavide, Edificio 46, Ctra. de Utrera km 1, 41013 Sevilla, SpainInstituto de la Grasa (CSIC), Campus Universitario Pablo de Olavide, Edificio 46, Ctra. de Utrera km 1, 41013 Sevilla, SpainInstituto de la Grasa (CSIC), Campus Universitario Pablo de Olavide, Edificio 46, Ctra. de Utrera km 1, 41013 Sevilla, SpainSteam-explosion is a promising technology for recovering phenolic compounds from olive mill solid waste (OMSW) due to its high impact on the structure of the fibre. Moreover, the recovery of the phenols, which are well-known microbial inhibitors, could improve the subsequent biomethanization of the dephenolized OMSW to produce energy. However, there is a considerable lack of knowledge about how the remaining phenolic compounds could affect a long-term biomethanization process of steam-exploded OMSW. This work evaluated a semi-continuous mesophilic anaerobic digestion of dephenolized steam-exploited OMSW during a long operational period (275 days), assessing different organic loading rates (OLRs). The process was stable at an OLR of 1 gVS/(L·d), with a specific production rate of 163 ± 28 mL CH<sub>4</sub>/(gVS·d). However, the increment of the OLR up to 2 gVS/(L·d) resulted in total exhaust of the methane production. The increment in the propionic acid concentration up to 1486 mg/L could be the main responsible factor for the inhibition. Regardless of the OLR, the concentration of phenolic compounds was always lower than the inhibition limits. Therefore, steam-exploited OMSW could be a suitable substrate for anaerobic digestion at a suitable OLR.https://www.mdpi.com/1996-1073/12/11/2222anaerobic digestioneconomic evaluationolive mill solid wastephenolic compoundssteam explosion |
| spellingShingle | Antonio Serrano Fernando G. Fermoso Bernabé Alonso-Fariñas Guillermo Rodríguez-Gutiérrez Sergio López Juan Fernandez-Bolaños Rafael Borja Long-Term Evaluation of Mesophilic Semi-Continuous Anaerobic Digestion of Olive Mill Solid Waste Pretreated with Steam-Explosion Energies anaerobic digestion economic evaluation olive mill solid waste phenolic compounds steam explosion |
| title | Long-Term Evaluation of Mesophilic Semi-Continuous Anaerobic Digestion of Olive Mill Solid Waste Pretreated with Steam-Explosion |
| title_full | Long-Term Evaluation of Mesophilic Semi-Continuous Anaerobic Digestion of Olive Mill Solid Waste Pretreated with Steam-Explosion |
| title_fullStr | Long-Term Evaluation of Mesophilic Semi-Continuous Anaerobic Digestion of Olive Mill Solid Waste Pretreated with Steam-Explosion |
| title_full_unstemmed | Long-Term Evaluation of Mesophilic Semi-Continuous Anaerobic Digestion of Olive Mill Solid Waste Pretreated with Steam-Explosion |
| title_short | Long-Term Evaluation of Mesophilic Semi-Continuous Anaerobic Digestion of Olive Mill Solid Waste Pretreated with Steam-Explosion |
| title_sort | long term evaluation of mesophilic semi continuous anaerobic digestion of olive mill solid waste pretreated with steam explosion |
| topic | anaerobic digestion economic evaluation olive mill solid waste phenolic compounds steam explosion |
| url | https://www.mdpi.com/1996-1073/12/11/2222 |
| work_keys_str_mv | AT antonioserrano longtermevaluationofmesophilicsemicontinuousanaerobicdigestionofolivemillsolidwastepretreatedwithsteamexplosion AT fernandogfermoso longtermevaluationofmesophilicsemicontinuousanaerobicdigestionofolivemillsolidwastepretreatedwithsteamexplosion AT bernabealonsofarinas longtermevaluationofmesophilicsemicontinuousanaerobicdigestionofolivemillsolidwastepretreatedwithsteamexplosion AT guillermorodriguezgutierrez longtermevaluationofmesophilicsemicontinuousanaerobicdigestionofolivemillsolidwastepretreatedwithsteamexplosion AT sergiolopez longtermevaluationofmesophilicsemicontinuousanaerobicdigestionofolivemillsolidwastepretreatedwithsteamexplosion AT juanfernandezbolanos longtermevaluationofmesophilicsemicontinuousanaerobicdigestionofolivemillsolidwastepretreatedwithsteamexplosion AT rafaelborja longtermevaluationofmesophilicsemicontinuousanaerobicdigestionofolivemillsolidwastepretreatedwithsteamexplosion |