Weak-base pretreatment to increase biomethane production from wheat straw
| Autor: | Michael Ayiania, Yuanfang Deng, Maryam Davaritouchaee, Yaojing Qiu, Yiqing Yao |
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| Rok vydání: | 2020 |
| Předmět: |
Health
Toxicology and Mutagenesis Lignocellulosic biomass 010501 environmental sciences 01 natural sciences Lignin chemistry.chemical_compound Biogas Spectroscopy Fourier Transform Infrared Environmental Chemistry Hemicellulose Food science Anaerobiosis Cellulose Triticum 0105 earth and related environmental sciences Chemistry food and beverages General Medicine Biodegradation Straw Pollution Anaerobic digestion Biofuels Methane |
| Zdroj: | Environmental science and pollution research international. 27(30) |
| ISSN: | 1614-7499 |
| Popis: | Weak-base pretreatment of wheat straw was investigated for its ability to improve biomethane production. Anaerobic digestion (AD) was performed on wheat straw pretreated with 3%, 5%, or 7% Na2CO3 as a weak base. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier Transform Infrared Spectroscopy (FTIR) spectra demonstrated disruption of lignocellulosic structures by pretreatment. In the 5% Na2CO3 treatment group, cellulose and hemicellulose were retained effectively, with efficient removal of lignin. The removal rates of cellulose, hemicellulose, and lignin were 27.9%, 20.4%, and 31.0%, respectively, after 5% Na2CO3 pretreatment. The methane content (53.3–77.3%) was improved in the 5% Na2CO3 treatment group, with maximum methane production (307.9 L/kg VS) that was 41.6% higher than that of the untreated sample. Cellulose and hemicelluloses were degraded 59.3% and 56.3% after AD. It took 20 days to reach 80% of the maximum cumulative methane production for the 5% Na2CO3 pretreatment group, which was 4 days faster than the untreated group. These results indicate that 5% Na2CO3 pretreatment improve the lignocellulose structure of wheat straw, allowing better biodegradability of wheat straw in AD for increased biogas production, enhanced methane content, and decreased digestion time. |
| Databáze: | OpenAIRE |
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