Effect of wheat straw pretreated with liquid fraction of digestate from different substrates on anaerobic digestion performance and microbial community characteristics
| Autor: | Shuai Yuan, Xiujin Li, Minghan Gao, Yufang Wei, Hairong Yuan, Yanyan Lan |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Environmental Engineering
Swine chemistry.chemical_compound Bioreactors Biogas Animals Environmental Chemistry Hemicellulose Anaerobiosis Food science Cellulose Waste Management and Disposal Triticum Microbiota food and beverages Straw Pollution Manure Refuse Disposal Anaerobic digestion Food waste chemistry Food Biofuels Digestate Methane |
| Zdroj: | Science of The Total Environment. 818:151764 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2021.151764 |
| Popis: | The effects of liquid fraction of digestate (LFD) pretreatment on anaerobic digestion (AD) performance and microbial community characteristics were estimated. Prior to AD, LFD (LFDSM, LFDFW, and LFDWS) collected separately from three continuously stirred tank reactors (CSTRs) using swine manure (SM), food waste (FW), and wheat straw (WS) as the mono-substrate was applied to pretreat WS. The results showed that AD with LFD pretreatment resulted in biomethane yields of 240.2–277.9 mL·gVS−1, a 33.57%–54.54% improvement over the yield of the control, and also produced a time saving of 32.26%–46.77%. The pretreatment parameters were optimized for LFD pretreatment. The enhancement effect was in the order of LFDFW > LFDSM > LFDWS. Simultaneously, the cellulose, hemicellulose and lignin contents in the WS and their characteristics (surface properties, crystallinity index, etc.) varied accordingly. The function of the microbial community was strengthened during the pretreatment stage, but the structure of the microbial community had a clear response to the LFD source substrates. Bacteroidetes was the most dominant phyla and was positively correlated with the hydrolysis rate. Consequently, the LFD from the different substrates used as pretreat agents could improve the AD performance of WS. |
| Databáze: | OpenAIRE |
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