2020
DOI: 10.3390/su12208549
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Fungal Pretreatments on Non-Sterile Solid Digestate to Enhance Methane Yield and the Sustainability of Anaerobic Digestion

Abstract: Fungi can run feedstock pretreatment to improve the hydrolysis and utilization of recalcitrant lignocellulose-rich biomass during anaerobic digestion (AD). In this study, three fungal strains (Coprinopsis cinerea MUT 6385, Cyclocybe aegerita MUT 5639, Cephalotrichum stemonitis MUT 6326) were inoculated in the non-sterile solid fraction of digestate, with the aim to further (re)use it as a feedstock for AD. The application of fungal pretreatments induced changes in the plant cell wall polymers, and different pr… Show more

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Cited by 12 publications
(6 citation statements)
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“…The pH of the digestate after sterilization was 11.4, while the optimal reported pH for P. ostreatus and S. rugosoannulata are 6.5-8.7 and 6.5-7.5, respectively [13]. In the studies by Zanellati et al (2020 and [71,72], however, the pH of SFD was lower, between 8.4 and 9.4 and a slight acidification was observed after treatment. The C/N of the SFD studied by Brémond et al (2020) [13] was 23.6, which might not have been high enough to promote enzymes excretion.…”
Section: Microbial Aerobic Post-treatmentmentioning
confidence: 90%
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“…The pH of the digestate after sterilization was 11.4, while the optimal reported pH for P. ostreatus and S. rugosoannulata are 6.5-8.7 and 6.5-7.5, respectively [13]. In the studies by Zanellati et al (2020 and [71,72], however, the pH of SFD was lower, between 8.4 and 9.4 and a slight acidification was observed after treatment. The C/N of the SFD studied by Brémond et al (2020) [13] was 23.6, which might not have been high enough to promote enzymes excretion.…”
Section: Microbial Aerobic Post-treatmentmentioning
confidence: 90%
“…Low C/N ratios negatively affect ligninolytic enzymes excretion, which occurs during the secondary metabolism of WRF under nutrients starvation, usually at nitrogen limitation [75]. High pH could be detrimental for fungal growth and enzymatic activities [72]. In the study conducted by Brémond et al (2020) [13], for instance, pH and C/N ratio were not optimal and might have negatively influenced the fungal growth and secondary metabolism.…”
Section: Microbial Aerobic Post-treatmentmentioning
confidence: 95%
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“…Therefore, the present approach could help to divert fermentescible organic wastes from landfills and to guarantee that high-quality secondary raw materials are produced. The remaining waste could then be used for agricultural compost production [25] or as a fungal pre-treated feedstock for anaerobic digestion to produce renewable energy [26]. Due to the predominance of CA in the biological solution, a classic titration was carried out in order to determine the concentration of CA.…”
Section: Citric Acid Productionmentioning
confidence: 99%