Influence of inoculum/substrate ratio on biogas yield and kinetics from the anaerobic co-digestion of food waste and maize husk

Owamah, H.I.; Ikpeseni, Sunday Chukwuyem; Alfa, M. I.; Oyebisi, Solomon; Gopikumar, S.; Samuel, Olusegun David; Ilabor, S.C.

doi:10.1016/j.enmm.2021.100558

Cited by 13 publications

(12 citation statements)

References 37 publications

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“…The challenge of meeting the growing demand for energy without harming the environment is global and requires the exploration of renewable energy sources as an alternative (Abam et al , 2020; Owamah et al , 2021). In this scenario, innovating is critical for countries and companies’ sustainability and economic development; however, applying innovation as an instrument for competitiveness is still a challenging task that requires efficient management skills and culture (Ali et al , 2021; Khurana et al , 2021).…”

Section: Introductionmentioning

confidence: 99%

The relationship between socioeconomic development, renewable energies and the innovative process

Sousa

Silva

Kaczam

et al. 2022

IJESM

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Purpose This paper aims to examine the relationships between socioeconomic development, renewable energy and the innovative process by providing: a descriptive analysis; a co-occurrence analysis of terms, thematic mapping and conceptual structure; and the typology of the textual corpus. Design/methodology/approach To analyze the relationship between “renewable energies, socioeconomic development and the innovative process,” it is necessary to build a theoretical foundation that contains the relevant scientific studies and reflects the current state of the art on the subject. For this, this study developed a systematic literature review (SLR) using the preferred reporting items for systematic reviews and meta-analyses research protocol to answer the relationship on the theme. Findings Research shows a global understanding of the need to invest in developing studies to reduce carbon dioxide emissions and improve economic growth. The main contributions lie in providing a typology of the state of the art, identifying the joint relationships between themes, insights into the key themes and indicating themes that must be developed. This study may also support future empirical studies as it provides a theoretical foundation for formulating hypotheses, which can be tested through qualitative and quantitative approaches. Originality/value The innovative character consists of addressing a shortage of SLRs on this theme. Thus, this paper fills this gap by providing a theoretical foundation for future scientific and academic knowledge generation. Furthermore, regarding the interdisciplinary aspects of this research as contributions, this paper presented different approaches and theoretical perspectives.

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Section: Introductionmentioning

confidence: 99%

The relationship between socioeconomic development, renewable energies and the innovative process

Sousa

Silva

Kaczam

et al. 2022

IJESM

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“…Similar studies [40,45,46] have considered modified Gompertz as one of the most accurate models to predict the kinetics of AD of FW. The studies also state that the predicted kinetic parameters depend on the substrate characteristics.…”

Section: Effect Of S:i Ratios On Biogas Production Kineticsmentioning

confidence: 96%

Effect of the Substrate to Inoculum Ratios on the Kinetics of Biogas Production during the Mesophilic Anaerobic Digestion of Food Waste

Khadka

Parajuli

Dangol³

et al. 2022

Energies

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This study evaluates the effects of the varying substrate to inoculum ratios (S:I) of 0.5, 1, 2, 3, 4, 5, and 6 (volatile solids/VS basis) on the kinetics of biogas production during batch mesophilic (35 ± 1 ℃) anaerobic digestion (AD) of simulated food waste (FW), using anaerobic digestate as the inoculum. Kinetic parameters during biogas production (scrubbed with NaOH solution) are predicted by the first-order and the modified Gompertz model. The observed average specific biogas yields are in descending order corresponding to the S:I ratios 1, 2, 4, 6, 3, 5, and 0.5, respectively, and the significant effect of the S:I ratio was observed. The tests with the S:I of 1 have the maximum average biogas production rates of 88.56 NmL/gVS.d, whereas tests with the S:I of 6 exhibited the lowest production rates (24.61 NmL/gVS.d). The maximum biogas yields, predicted by the first order and the modified Gompertz model, are 668.65 NmL/gVS (experimental 674.40 ± 29.10 NmL/gVS) and 653.17 NmL/gVS, respectively. The modified Gompertz model has been proven to be suitable in predicting biogas production from FW. VS removal efficiency is greater in higher S:I ratios, with a maximum of 78.80 % at the S:I ratio of 6, supported by the longer incubation time. Moreover, a significant effect of the S:I ratio is seen on kinetics and energy recovery from the AD of FW.

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“…Due to the high amounts of protein, nitrogen, and organic matter in the feedstock, fatty acids and ammonia can accumulate during AD (Latifi et al, 2019), such that biogas yield can vary with inoculum/substrate ratios. Indeed, the use of a suboptimal inoculum/substrate ratio could make methanogen bacteria act suboptimally, leading to a reduction in biogas and methane performance (Owamah et al, 2021). Thus, it is necessary to determine the optimum inoculum quantity to maximize biogas yield.…”

Section: Improving Biogas Productionmentioning

confidence: 99%

Production of biochar from crop residues and its application for anaerobic digestion

Hoang

Goldfarb

Foley

et al. 2022

Bioresource Technology

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Influence of inoculum/substrate ratio on biogas yield and kinetics from the anaerobic co-digestion of food waste and maize husk

Cited by 13 publications

References 37 publications

The relationship between socioeconomic development, renewable energies and the innovative process

The relationship between socioeconomic development, renewable energies and the innovative process

Effect of the Substrate to Inoculum Ratios on the Kinetics of Biogas Production during the Mesophilic Anaerobic Digestion of Food Waste

Production of biochar from crop residues and its application for anaerobic digestion

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