Exhausted Fungal Biomass as a Feedstock for Increasing Methane Production During the Anaerobic Digestion of Organic Wastes

Hom-Díaz, Andrea; Baldi, F.; Blánquez, Paqui; Lombardi, Lidia; Martín-González, Lucía; Vicent, Teresa

doi:10.1007/s12649-015-9450-8

Cited by 9 publications

(4 citation statements)

References 46 publications

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“…EE2 did not cause inhibition of the hydrogenotrophic community at any of the concentrations tested. To date, the reports available reveal no inhibitory effect of EE2 at concentrations up to 2 mg/L (Hom-Diaz et al 2016).…”

Section: Resultsmentioning

confidence: 93%

Ciprofloxacin, diclofenac, ibuprofen and 17α-ethinylestradiol differentially affect the activity of acetogens and methanogens in anaerobic communities

et al. 2020

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Pharmaceutical compounds end up in wastewater treatment plants but little is known on their effect towards the different microbial groups in anaerobic communities. In this work, the effect of the antibiotic Ciprofloxacin (CIP), the non-steroidal anti-inflammatory drugs Diclofenac (DCF) and Ibuprofen (IBP), and the hormone 17α-ethinylestradiol (EE2), on the activity of acetogens and methanogens in anaerobic communities, was investigated. Microbial communities were more affected by CIP, followed by EE2, DCF and IBP, but the response of the different microbial groups was dissimilar. For concentrations of 0.01 to 0.1 mg/L, the specific methanogenic activity was not affected. Acetogenic bacteria were sensitive to CIP concentrations above 1 mg/L, while DCF and EE2 toxicity was only detected for concentrations higher than 10 mg/L, and IBP had no effect in all concentrations tested. Acetoclastic methanogens showed higher sensitivity to the presence of these micropollutants, being affect by all the tested pharmaceutical compounds although at different degrees. Hydrogenotrophic methanogens were not affected by any concentration, indicating their lower sensitivity to these compounds when compared to acetoclasts and acetogens.

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Section: Resultsmentioning

confidence: 93%

Ciprofloxacin, diclofenac, ibuprofen and 17α-ethinylestradiol differentially affect the activity of acetogens and methanogens in anaerobic communities

et al. 2020

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“…In fact, the fungal biomass contains lipids, proteins, and other molecules that may boost the microorganisms involved in AD. As demonstrated by Hom-Diaz et al [51], exhausted fungal biomass could be profitably used as a substrate in AD processes, producing 281-595 L methane/kg VS. Jasko et al [52] tested the BMP of fungal biomass of Paxillus involutus and Phaeolus schweinitzii and they obtained a biogas production of 607.3 L/kg VS and 137.9 L/kg VS, respectively. The difference between the results obtained with different fungal strains was accounted to the difference in VS composition or to the production of bioactive compounds able to inhibit or enhance the AD process [52].…”

Section: Bmp Testsmentioning

confidence: 98%

“…The difference between the results obtained with different fungal strains was accounted to the difference in VS composition or to the production of bioactive compounds able to inhibit or enhance the AD process [52]. In this study, considering the average methane productivity reported in literature per g of fungal VS (about 382.5 ± 169.2 mL/g VS) [51,52] and the amount of fungal VS introduced inside each batch reactor (0.71 g VS), the fungal biomass could have contributed to approximately 5-10% of the total methane productivity.…”

Section: Bmp Testsmentioning

confidence: 98%

Fungal Pretreatments on Non-Sterile Solid Digestate to Enhance Methane Yield and the Sustainability of Anaerobic Digestion

et al. 2020

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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 profiles were observed among strains. Significant increases (p < 0.05) in the cumulative biogas and methane yields with respect to the untreated control were observed. The most effective pretreatment was carried out for 20 days with C. stemonitis, causing the highest hemicellulose, lignin, and cellulose reduction (59.3%, 9.6%, and 8.2%, respectively); the cumulative biogas and methane production showed a 182% and 214% increase, respectively, compared to the untreated control. The increase in AD yields was ascribable both to the addition of fungal biomass, which acted as an organic feedstock, and to the lignocellulose transformation due to fungal activity during pretreatments. The developed technologies have the potential to enhance the anaerobic degradability of solid digestate and untap its biogas potential for a further digestion step, thus allowing an improvement in the environmental and economic sustainability of the AD process and the better management of its by-products.

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“…and Rhizopus sp. species [41], but one of the main disadvantages is that FOG substrate has to be dewatered and made to undergo solid state pretreatment, which slows down the mass flow and has unfavourable maintenance [42]. Microbial enzyme dosage could cover the gaps in the biogas formation process by helping to prepare substrates for the next fermentation steps.…”

Section: Microbial Cultures Involved In Fog Digestionmentioning

confidence: 99%

Problems with Fat, Oil, and Grease (FOG) in Food Industry Wastewaters and Recovered FOG Recycling Methods Using Anaerobic Co-Digestion: A Short Review

Klaucans¹,

Sams²

2018

KEM

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Food production industry is the main producer of wastewaters with high fat, oil, and grease (FOG) content. FOG waste can be recovered from the wastewater stream by using physicochemical methods and reused considering their high methane potential. Popular method of FOG reuse is anaerobic co-digestion (AcoD) with wastewater treatment sludge and scum from the primary wastewater sedimentation tanks. This short review focuses on understanding the efficiency of FOG reuse possibilities by AcoD and takes a closer look at problems connected to degradation issues, gives an understanding on microbial changes during FOG degradation, and reviews enzymes involved in the degradation process.

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Exhausted Fungal Biomass as a Feedstock for Increasing Methane Production During the Anaerobic Digestion of Organic Wastes

Cited by 9 publications

References 46 publications

Ciprofloxacin, diclofenac, ibuprofen and 17α-ethinylestradiol differentially affect the activity of acetogens and methanogens in anaerobic communities

Ciprofloxacin, diclofenac, ibuprofen and 17α-ethinylestradiol differentially affect the activity of acetogens and methanogens in anaerobic communities

Fungal Pretreatments on Non-Sterile Solid Digestate to Enhance Methane Yield and the Sustainability of Anaerobic Digestion

Problems with Fat, Oil, and Grease (FOG) in Food Industry Wastewaters and Recovered FOG Recycling Methods Using Anaerobic Co-Digestion: A Short Review

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