Influence of Inoculums/Substrate Ratios (ISRs) on the Mesophilic Anaerobic Digestion of Slaughterhouse Waste in Batch Mode: Process Stability and Biogas Production

Kalloum, Slimane; Salem, Fethya; Assia, Kouki; Hamza, Mokaddem

doi:10.1016/j.egypro.2014.06.007

Cited by 44 publications

(20 citation statements)

References 17 publications

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“…The tests with pH of 3.6, temperature of 37°C and sugar concentration of 50 gL -1 , showed a null methane production, this has a similarity with those reported by Slimane et al [20]; Donoso et al [21]; Eskicigluo and Ghorbani [22] and González et al [23]. These indicate that low pH favors the development of inhibitors in the system, such as volatile fatty acids, ammonia and CO2.…”

Section: MLsupporting

confidence: 86%

Methane production from coffee crop residues

PÉREZ-SARIÑANA¹,

DÍAZ-GONZÁLEZ²,

León‐Rodríguez³

et al. 2019

Rom Biotechnol Lett.

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The increase in global energy demand promotes the use of energy crops and agroindustrial residues for biogas or methane production. In agro-business, the coffee waste as mucilage is a major source of carbohydrates mainly galactose and glucose. The aim of this study is to optimize the anaerobic digestion process of coffee mucilage for methane production. An experimental design 2 3 full factorial with center points was set, generating 20 treatments, considering factors such as pH, temperature and initial sugar concentration. Optimal conditions for the methane production from coffee mucilage estimated by statistical software were pH 8.2, temperature 37ºC and sugar concentration 27 gL-1. Through this research project, the experimental optimum conditions for the production of methane from coffee mucilage were used, which were pH 8.2, temperature 37 °C, sugar concentration 25.5 gL-1 and 313 mL methane (atmospheric pressure), the last exceeded the estimated optimal condition.

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Section: MLsupporting

confidence: 86%

Methane production from coffee crop residues

PÉREZ-SARIÑANA¹,

DÍAZ-GONZÁLEZ²,

León‐Rodríguez³

et al. 2019

Rom Biotechnol Lett.

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“…There are numerous parameters that may affect AD, some of which are pH, carbon/nitrogen content ratio, temperature, hydraulic retention time, storage time, and the rate of organic loading. 28 AD is composed of hydrolysis, acidification, and methanogenesis stages 29 or as others suggest an additional acetogenesis stage may be involved before methanogenesis [30][31][32][33] that eventually produce renewable energy with reduced treatment costs for electricity, heating, and cooking. 25,[34][35][36] Anaerobic digestion is now attracting most of the attentions worldwide (eg, USA and China produced 8.5 × 10 9 and 15 × 10 9 m 3 of biogas in 2014, respectively 27 ) as biomass energy source because of its numerous advantages that range from stabilizing the organic wastes, producing energy with relatively low cost, reduced nutrient needs, and high rate of organic load as reported by Wijekoon et al 37 The gases, H 2 S, NH 3 , H 2 , and the mixture of CH 4 and CO 2 are the possible products of AD to organic materials.…”

Section: Anaerobic Digestion Of Organic Matermentioning

confidence: 99%

Photobiostimulation of anaerobic digestion by laser irradiation and photocatalytic effects of trace metals and nanomaterials on biogas production

2020

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Biogas generation from the latent energy in biomass is one of the most attractive renewable energy sources. This can be attributed to the environmental friendly nature of the process and its less energy requirements. This article reviews the anaerobic digestion of biomass (livestock manure and crop residues) for biogas and methane production as a source of renewable energy. Furthermore, this study investigates the enhancement of biogas and methane production using light and laser radiations. The laser radiation accelerates bacterial division and growth, where this process is termed as "photobiostimulation." Additionally, laser radiation photoactivates the inactive enzymes. The results of this literature review showed that the irradiation of methanogenic bacteria with laser sources increased the biogas production by one and a half fold the traditional method of biogas production. The simultaneous irradiation of both nanomaterials and methanogenic bacteria using laser radiation increased the biogas volume by twofolds the biogas volume resulted from the traditional method of biogas production.

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“…The SI-ratio 0.5 showed the highest methane production (254.4 L CH4 / kgVS) and highest pathogen removal, while SI-ratio 0.4 showed the lowest methane yield (110 L CH4 / kgVS) and lowest pathogen removal. Slimane et al (2014) found that the AD of slaughterhouse wastewater increased with SI-ratio 0.3, in comparison to SI-ratios 0.5 and 1. After 48 days of experiments, SI-ratio 0.3 reached a biogas production of 864 mL, SI-ratio 0.5 produced 856 mL and SI-ratio 1.0 generated 504 mL of biogas.…”

Section: Effect Of Substrate-inoculum Rate On Anaerobic Digestionmentioning

confidence: 88%