Biological pre-hydrolysis and thermal pretreatment applied for anaerobic digestion improvement: Kinetic study and statistical variable selection
•Biological prehydrolysis and thermal treatment were used to improve anaerobic digestion.•The higher methane yield was reached at BPH 37 °C for 20 h followed 55 °C for 20 h.•Statistical study allowed us four essential variables to modeling methane yield.•Predicted methane yield was close to experime...
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| Veröffentlicht in: | Cleaner Waste Systems Jg. 2; S. 100005 |
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| Format: | Journal Article |
| Sprache: | Englisch |
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01.07.2022
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| ISSN: | 2772-9125, 2772-9125 |
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| Abstract | •Biological prehydrolysis and thermal treatment were used to improve anaerobic digestion.•The higher methane yield was reached at BPH 37 °C for 20 h followed 55 °C for 20 h.•Statistical study allowed us four essential variables to modeling methane yield.•Predicted methane yield was close to experimental, which validates the models used.
[Display omitted]
In the present study, two pretreatment methods (thermal pretreatment and biological pre-hydrolysis) were suggested for food waste (FW) with the aim to enhance biomass conversion and biogas production by anaerobic. The effects of thermal pretreatment (TP), including TP at 60 °C and 80 °C for 60 min, and TP at 100 °C, 120 °C and 140 °C for 30 min, well as biological pre-hydrolysis (BPH) at 37 °C, 55 °C, 37 °C followed by 55 °C and 55 °C followed by 37 °C for 40 h on anaerobic digestion performance of FW were evaluated in batch tests. Results were compared with untreated FW. The BPH and TP caused an increase in the soluble chemical oxygen demand and hydrolysis efficiency. The methane yield (MY) increased from 371.17 mL CH4/g VS for untreated FW to 471.95 mL CH4/ g VS. The maximal MY was recorded for BPH at 37 °C for 20 h followed by 55 °C for 20 h. The pretreatments increased the biogas production rate and reduced the lag phase. The most influential variables on the methane yield were investigated using three statistical methods: Principal component analysis, Mutual Information and R-squared. The results allowed a good modeling of the methane yield and minimized the overfitting effect. For reproduction and solid contribution to the field, we have attached to our article all the necessary material to reproduce the same statistical work as in the paper body. |
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| AbstractList | In the present study, two pretreatment methods (thermal pretreatment and biological pre-hydrolysis) were suggested for food waste (FW) with the aim to enhance biomass conversion and biogas production by anaerobic. The effects of thermal pretreatment (TP), including TP at 60°C and 80°C for 60 min, and TP at 100°C, 120°C and 140°C for 30 min, well as biological pre-hydrolysis (BPH) at 37°C, 55°C, 37°C followed by 55°C and 55°C followed by 37°C for 40 hour on anaerobic digestion performance of FW were evaluated in batch tests. Results were compared with untreated FW. The BPH and TP caused an increase in the soluble chemical oxygen demand and hydrolysis efficiency. The methane yield (MY) increased from 371.17 ml CH4/g VS for untreated FW to 471.95 ml CH4/ g VS. The maximal MY was recorded for BPH at 37°C for 20 h followed by 55°C for 20 h. The pretreatments increased the biogas production rate and reduced the lag phase. The most influential variables on the methane yield were investigated using three statistical methods: Principal component analysis, Mutual Information and R-squared. The results allowed a good modeling of the methane yield and minimized the overfitting effect. For reproduction and solid contribution to the field, we have attached to our article all the necessary material to reproduce the same statistical work as in the paper body. •Biological prehydrolysis and thermal treatment were used to improve anaerobic digestion.•The higher methane yield was reached at BPH 37 °C for 20 h followed 55 °C for 20 h.•Statistical study allowed us four essential variables to modeling methane yield.•Predicted methane yield was close to experimental, which validates the models used. [Display omitted] In the present study, two pretreatment methods (thermal pretreatment and biological pre-hydrolysis) were suggested for food waste (FW) with the aim to enhance biomass conversion and biogas production by anaerobic. The effects of thermal pretreatment (TP), including TP at 60 °C and 80 °C for 60 min, and TP at 100 °C, 120 °C and 140 °C for 30 min, well as biological pre-hydrolysis (BPH) at 37 °C, 55 °C, 37 °C followed by 55 °C and 55 °C followed by 37 °C for 40 h on anaerobic digestion performance of FW were evaluated in batch tests. Results were compared with untreated FW. The BPH and TP caused an increase in the soluble chemical oxygen demand and hydrolysis efficiency. The methane yield (MY) increased from 371.17 mL CH4/g VS for untreated FW to 471.95 mL CH4/ g VS. The maximal MY was recorded for BPH at 37 °C for 20 h followed by 55 °C for 20 h. The pretreatments increased the biogas production rate and reduced the lag phase. The most influential variables on the methane yield were investigated using three statistical methods: Principal component analysis, Mutual Information and R-squared. The results allowed a good modeling of the methane yield and minimized the overfitting effect. For reproduction and solid contribution to the field, we have attached to our article all the necessary material to reproduce the same statistical work as in the paper body. |
| ArticleNumber | 100005 |
| Author | Barz, M. Herrmann, C. El Gnaoui, Y. Frimane, A. EL Bari, H. Lahboubi, N. |
| Author_xml | – sequence: 1 givenname: Y. surname: El Gnaoui fullname: El Gnaoui, Y. organization: Electronic Systems, Information Processing, Mechanics and Energetics, Faculty of Science, Kenitra, Morocco – sequence: 2 givenname: A. surname: Frimane fullname: Frimane, A. organization: Department of Engineering Sciences, Uppsala University, SE-751 21 Uppsala, Sweden – sequence: 3 givenname: N. surname: Lahboubi fullname: Lahboubi, N. email: nabila.lahboubi@uit.ac.ma organization: Electronic Systems, Information Processing, Mechanics and Energetics, Faculty of Science, Kenitra, Morocco – sequence: 4 givenname: C. surname: Herrmann fullname: Herrmann, C. organization: Leibniz Institute for agricultural Engineering and Bioeconomy (ATB) / Department of Bioengineering, Potsdam, Germany – sequence: 5 givenname: M. surname: Barz fullname: Barz, M. organization: Hochschule für Technik und Wirtschaft (HTW), Berlin, Germany – sequence: 6 givenname: H. surname: EL Bari fullname: EL Bari, H. organization: Electronic Systems, Information Processing, Mechanics and Energetics, Faculty of Science, Kenitra, Morocco |
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| Cites_doi | 10.1016/j.cep.2006.02.005 10.1016/S1350-4177(98)00042-X 10.1016/j.apenergy.2014.02.035 10.1016/j.biortech.2014.08.025 10.1016/j.biortech.2014.01.118 10.1016/j.egyr.2019.11.096 10.1016/j.biortech.2017.08.064 10.1016/j.wasman.2013.10.024 10.1016/j.envres.2021.110792 10.1016/j.wasman.2011.09.027 10.1016/j.biortech.2017.05.114 10.1016/j.jece.2020.103874 10.1016/j.biortech.2017.07.166 10.1016/j.jenvman.2016.05.047 10.1016/j.biortech.2017.09.109 10.2174/1874829501003010071 10.3390/w10121812 10.1016/j.jenvman.2014.07.042 10.1016/j.rser.2019.109587 |
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| Keywords | Food waste Statistical method Biological pre-hydrolysis Thermal pretreatment Anaerobic digestion |
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| Snippet | •Biological prehydrolysis and thermal treatment were used to improve anaerobic digestion.•The higher methane yield was reached at BPH 37 °C for 20 h followed... In the present study, two pretreatment methods (thermal pretreatment and biological pre-hydrolysis) were suggested for food waste (FW) with the aim to enhance... |
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| SubjectTerms | Anaerobic digestion Biological pre-hydrolysis Engineering Science with specialization in Civil Engineering and Built Environment Food waste Statistical method Teknisk fysik med inriktning mot byggteknik och byggd miljö Thermal pretreatment |
| Title | Biological pre-hydrolysis and thermal pretreatment applied for anaerobic digestion improvement: Kinetic study and statistical variable selection |
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