Optimization of dilute acetic acid pretreatment of mixed fruit waste for increased methane production
| Autor: | Soon Woong Chang, Shekhar B. Jadhav, Sanjay P. Govindwar, Mayur B. Kurade, Byong-Hun Jeon, Pradip K. Chatterjee, Sun Joon Kim, Shouvik Saha |
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| Rok vydání: | 2018 |
| Předmět: |
Thermogravimetric analysis
Renewable Energy Sustainability and the Environment 020209 energy Strategy and Management 02 engineering and technology 010501 environmental sciences 01 natural sciences Industrial and Manufacturing Engineering Methane Bioavailability Acetic acid chemistry.chemical_compound Anaerobic digestion chemistry Cellulosic ethanol 0202 electrical engineering electronic engineering information engineering Fourier transform infrared spectroscopy Sugar 0105 earth and related environmental sciences General Environmental Science Nuclear chemistry |
| Zdroj: | Journal of Cleaner Production. 190:411-421 |
| ISSN: | 0959-6526 |
| Popis: | A proper waste management practice such as anaerobic digestion for the waste generated by the agro-food industries could minimize the amount of material disposal to landfill. In our study, the improvement of methane production was elucidated through the pretreatment optimization of the mixed fruit wastes (FW). Dilute acetic acid pretreatment of FW was optimized in order to increase the bioavailability and microbial accessibility. A maximum sugar recovery of 95% was achieved from the pretreated FW under the optimized conditions (0.2 M acetic acid, 62.5 °C, and 30 min). Fourier transform infrared spectroscopy (FTIR) and Thermogravimetric (TG) analyses verified the presence of cellulosic material in the pretreated FW. X-ray diffraction (XRD) analysis indicated that the crystallinity index was increased to 56% after the disruption of complex hemicellulosic structures during pretreatment. Increased porosity and surface roughness of pretreated FW for better microbial attachment were confirmed in scanning electron microscopy (SEM). Anaerobic digestion showed increased methanogenic activity (10.17 mL g−1 VSinitial d−1) in pretreated FW, during 86-day experimental period due to better microbial attachment and accessibility during the digestion process. Higher methane yield of 53.58 mL g−1 VSinitial was observed in pretreated FW. Thus, acetic acid pretreatment is an effective method to improve the utilization and conversion of FW to methane. |
| Databáze: | OpenAIRE |
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