Effect of the inoculum/substrate ratio on the biochemical methane potential (BMP) of grape marc

Silva, Kessia Caroline Dantas da; Amorim, Miriam Cleide Cavalcante de; Galvão, Renan Santana; Gonçalves, Yandra Beatriz de Oliveira; Silva, Paula Tereza de Souza e; Barros, Eduardo Souza Costa

doi:10.4136/ambi-agua.2541

Cited by 4 publications

(3 citation statements)

References 29 publications

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“…In the current study, the results showed that methane yields increased at a higher ISR, and are in agreement with previous studies in which different substrates have been used (Silva et al, 2020;Córdoba et al, 2018;Raposo et al, 2009;Wei et al, 2014). An optimal ISR in the biodigester is considered to contain the balanced amount of anaerobic microorganisms for the digestion of primary and intermediate products (Eskicioglu and Ghorbani, 2011).…”

Section: Effect Of Isr On Biomethane Potential and Biodigester Stabilitysupporting

confidence: 93%

Evaluation of methane production from the anaerobic co-digestion of manure of guinea pig with lignocellulosic Andean residues

Quelal

Velázquez‐Martí

Chavez

et al. 2021

Environ Sci Pollut Res

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The objective of this research was to evaluate the anaerobic co-digestion of guinea pig manure (CY) with Andean agricultural residues such as amaranth (AM), quinoa (QU) and wheat (TR) in batch biodigesters under mesophilic conditions (37⁰C) for 40 days. As microbial inoculum, sewage treatment sludge was used in two inoculum/substrate ratios (ISR of 1 and 2). In terms of methane production, the best results occurred in the treatments that contained AM and QU as cosubstrate and an ISR of 2. Thus, the highest methane production occurred in the CY:AM biodigesters (25:75) and CY:QU (25:75) with 341.86 mlCH 4 /g VS and 341.05 mlCH 4 /g VS, respectively. On the other hand, the results showed that methane production with an ISR of 2 was more feasible for guinea pig waste, where the methane fraction of the biogas generated was in a range of 57 and 69%. The kinetics of methane production from these raw materials was studied using five kinetic models: modified Gompertz, logistic equation, transfer, cone, and Richards.The cone model was the one that best adjusted the experimental values with those observed with an r 2 of 0.999 and an RMSE of 1.16 mlCH 4 /g VS. Finally, the highest biodegradability was obtained in the CY-AM biodigesters (25:75) with 67.92%.

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Section: Effect Of Isr On Biomethane Potential and Biodigester Stabilitysupporting

confidence: 93%

Evaluation of methane production from the anaerobic co-digestion of manure of guinea pig with lignocellulosic Andean residues

Quelal

Velázquez‐Martí

Chavez

et al. 2021

Environ Sci Pollut Res

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“…The authors explained that the stable woody substrates of P&P WAS, including cellulose and lignin, may be responsible for the low biodegradability when compared with sewage sludge. Nevertheless, the results are superior to those reported for other organic materials, such as: peanut shells (84-157 mL CH4/gVS), coffee husks (116-155 mL CH4/gVS) [40], fresh 4190 grass and silage (125-186 mL CH4/gVS) [48] and grape marc (19-64 mL CH4/gVS) [49]. Table 12 shows the comparison with other studies, where it is demonstrated that pulp mill WAS is a promising substrate for methane production.…”

Section: Methane Productioncontrasting

confidence: 67%

Pretreatment of eucalyptus kraft pulp mill waste activated sludge to enhance anaerobic digestion

Fioreze¹

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Pulp and paper (P&P) mills are currently one of the largest industrial water consumers and effluent generators worldwide. The biological effluent treatment processes currently in use generate a large volume of sludge (waste activated sludge – WAS), which requires great efforts and high costs to manage. An interesting option for sludge management is anaerobic digestion, a means of reducing sludge volume while generating renewable energy that can be used in the industrial processes. However, anaerobic technology needs to be improved, mainly due to the 30- to 40-day retention time required to digest pulp mill sludge in conventional anaerobic bioreactors. The thesis was structured in 3 chapters written as scientific papers. Chapter 1 presented a literature review about the potential of anaerobic digestion for sludge treatment in P&P mills and the application of pretreatment methods to enhance methane production, decrease the retention time and, ultimately, decrease the volume of the digesters. A case study examining the potential of integrating pretreatment and anaerobic sludge digestion in a Brazilian kraft pulp mill is also presented. The literature review resulted in 52 matches in which 16 articles were related to anaerobic digestion or co-digestion of P&P sludge without pretreatment and 20 articles had to do with anaerobic digestion of P&P sludge after pretreatment. A large discrepancy among the presented results made it difficult to assess the suitability of anaerobic digestion and the actual impacts of the sludge pretreatment on the viability of the system. Simulations were carried out using current data from a Brazilian kraft pulp mill and indicated the important role of sludge pretreatment in potential methane production. Chapter 2 aimed the application of thermal, thermal-alkaline and mechanical pretreatment methods in order to promote the solubilization of organic matter to enhance the anaerobic digestion. Chemical analyses showed an improvement in organic matter solubilization, with an increase greater than 1.2-fold for total COD, 7-fold for soluble COD and 4-fold for BOD 5 . In general, thermal-alkaline pretreatment showed the best results for all the evaluated parameters, with the advantage of requiring lower temperature and retention time when compared to thermal conditions. Chapter 3 aimed to evaluate the potential of methane production from the WAS of a bleached kraft pulp mill applying biochemical methane potential (BMP). After 30 days of testing, cumulative methane production increased from 90 mL CH 4 /gVS (raw sludge) to 181-194 mL CH 4 /gVS with thermally pretreated samples, and up to 203-204 mL CH 4 /gVS with samples which were pretreated using the thermo-alkaline technique. The pretreatment conditions of 175 °C for 15 min at pH 11 were sufficient to achieve both a high solubilization of WAS and a high methane production. The results showed that pretreatment could significantly enhance the anaerobic digestion of kraft pulp mill WAS, making this an attractive new option for sludge management in this sector. Keywords: Anaerobic digestion. Methane yield. Pretreatment. Pulp and paper mill. Secondary sludge.

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“…2023 (2020) para uma alta produtividade de biogás. Silva et al (2020), estudando o efeito da relação inóculo/substrato (I/S) no potencial bioquímico de metano do bagaço de uva observaram que a relação I/S 3 proporcionou os melhores resultados para carregamento de sistemas anaeróbios, indicando que o bagaço de uva apresenta potencial para tratamento biológico por digestão anaeróbia. Substrato, quimicamente, similar a alguns tratamentos deste trabalho.…”

Section: Tratamentos ------------Entrada------------------------saída...unclassified

Produção de biogás a partir da fermentação de sorgo sacarino in natura, resíduos de frutas e dejetos de animais

Machado¹,

Alves²,

Otsuka³

et al. 2023

Braz. J. Anim. Environ. Res.

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Com o aumento populacional existe uma demanda crescente na produção de alimentos de origem animal e vegetal. Os atuais sistemas de produção, normalmente, apresentam perdas significativas ao longo de toda cadeia produtiva gerando grande volume de resíduos. Neste contexto, os biodigestores anaeróbicos surgem como proposta vantajosa na solução do problema tratando os resíduos, produzindo biogás e biofertilizantes. Objetivou-se com este trabalho avaliar o potencial de produção de biogás a partir da fermentação anaeróbia da biomassa de sorgo sacarino, resíduos de acerola, resíduos de goiaba, dejetos de bovinos e dejetos de caprinos confinados. Caracterizaram-se os efluentes e afluentes dos biodigestores quanto aos parâmetros físicos (Sólidos Totais, Sólidos Fixos e Sólidos Voláteis) e físico-químicos: (pH e Condutividade Elétrica), calculou-se o rendimento (Lbiogáskg-1sv.ad), a produtividade (LbiogásL-1reatord-1) de biogás e a Carga Orgânica Volumétrica adicionada COVad (kgsvL-1reatord-1). O experimento foi conduzido no Campus de Ciências Agrárias da Universidade Federal do Vale do São Francisco com tempo de retenção hidráulica de 42 dias, por meio de delineamento em blocos casualizados (DBC). A produção de biogás a partir da fermentação anaeróbia de dejetos de bovinos e caprinos foi superior aos demais tratamentos de biomassa vegetal. Os parâmetros físicos: Sólidos Totais, Sólidos Fixos e Sólidos Voláteis, dos efluentes e afluentes dos biodigestores, apresentaram valores similares aos encontrados na literatura para ambos os tratamentos. Os parâmetros físico-químicos: pH e Condutividade Elétrica dos efluentes e afluentes dos biodigestores não permaneceram dentro das faixas, denominadas ideais, descritas na literatura para produção de biogás, exceto os tratamentos com dejetos de origem animal. O dejeto bovino apresentou maior rendimento (15,586 Lbiogáskg-1svad) e maior produtividade (0,0206 LbiogásL-1reatord-1) de biogás em relação aos demais tratamentos com uma COV média de 0,371 kgsvL-1reatord-1

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Effect of the inoculum/substrate ratio on the biochemical methane potential (BMP) of grape marc

Cited by 4 publications

References 29 publications

Evaluation of methane production from the anaerobic co-digestion of manure of guinea pig with lignocellulosic Andean residues

Evaluation of methane production from the anaerobic co-digestion of manure of guinea pig with lignocellulosic Andean residues

Pretreatment of eucalyptus kraft pulp mill waste activated sludge to enhance anaerobic digestion

Produção de biogás a partir da fermentação de sorgo sacarino in natura, resíduos de frutas e dejetos de animais

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