Enhanced Biogas Production from Rice Husk Through Solid-State Chemical Pretreatments

Olugbemide, Akinola David; Lajide, Labunmi; Adebayo, A. O.; Owolabi, Bodunde Joseph

doi:10.1007/s12649-018-00567-9

Cited by 19 publications

(8 citation statements)

References 47 publications

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“…The decrease in pH values may be partly due to the accumulation of volatile fatty acids in the medium and the low buffering capacity of these digesters early in the process. 31…”

Section: Resultsmentioning

confidence: 99%

“…The decrease in pH values may be partly due to the accumulation of volatile fatty acids in the medium and the low buffering capacity of these digesters early in the process. 31 Considering these values, we can observe the difference between the different digesters in terms of pH decrease. Indeed, decreases of 0.21, 0.89, 1.95 and 2.86 were recorded for the untreated digesters and those treated with 1, 2.5 and 5% NaOH, respectively.…”

Section: Changes In Phmentioning

confidence: 93%

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Experimental Study of Increase of Biogas Production from Lagoon Station's Sludge by Alkaline Pretreatment

Dahou

Kouider

Dehmani

et al. 2022

Energy & Environment

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The present research focuses on the experimental study of the effect of alkaline pretreatment with NaOH on biogas production. Different concentrations of NaOH, i.e. 1, 2.5 and 5% (w/w), were tested on the lagoon station's sludge (dry basis) at room temperature for 24 h. The results obtained after 60 days of digestion, through the cumulative volume of biogas recorded, clearly indicate a positive effect of the chemical alkaline pretreatment on the anaerobic digestion since the amount of biogas produced increased by 42.6% when the NaOH concentration was close to 2.5%. This concentration is considered optimal under the chosen conditions. Indeed, inhibition of the methanogenic activity and a blockage of the digestion process are observed beyond this concentration. These results suggest that the alkaline pretreatment can improve the energy efficiency of the obtained biogas (CH4 content) and reduce the residence time.

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“…The decrease in pH values may be partly due to the accumulation of volatile fatty acids in the medium and the low buffering capacity of these digesters early in the process. 31…”

Section: Resultsmentioning

confidence: 99%

Section: Changes In Phmentioning

confidence: 93%

Experimental Study of Increase of Biogas Production from Lagoon Station's Sludge by Alkaline Pretreatment

Dahou

Kouider

Dehmani

et al. 2022

Energy & Environment

View full text Add to dashboard Cite

show abstract

“…for rice straw, the highest increase in biogas production (125%) was obtained when combined pretreatment including chemical plus thermal pre-treatments was used (Dehghani et al, 2015). The physiochemical pretreatment including chemical plus thermal pre-treatments (3% C 2 H 5 OH and 100 °C during 60 min) showed an increase by 122% in biogas production (Olugbemide et al, 2019). The combined pre-treatment including chemical plus thermal pre-treatments that used 5% NaOH and 200 °C for 10 min showed similar increase in biogas production (Chandra et al, 2012c).…”

Section: Biological Pre-treatmentsmentioning

confidence: 99%

Effective Pre-Treatments for Enhancement of Biodegradation of Agricultural Lignocellulosic Wastes in Anaerobic Digestion – A Review

Rahimi-Ajdadi

Esmaili

2020

Acta Technologica Agriculturae

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Agricultural crop residues like stems, straws and leaves are valuable resources for biofuel production, especially methane, due to anaerobic digestion. Biogas from agricultural lignocellulosic wastes is capable of attaining sustainable energy yields without environmental pollution. Farmers in many developing countries burn these wastes throughout their fields, imposing environmental hazard due to emission of greenhouse gases. The main problem in this field is the recalcitrance of the agricultural lignocellulose waste that limits its enzymatic degradation and hydrolysis efficiency and consequently decreases biogas production. Therefore, efficient pre-treatments prior to anaerobic digestion are essential. Various pre-treatment methods are used for increasing the anaerobic digestibility of lignocellulose biomass, such as physical (mechanical, thermal, etc.), chemical, biological and combined pre-treatments. This paper reviews different pre-treatments used in anaerobic digestion for the agricultural lignocellulosic wastes and explains the advantages and disadvantages of each. The most frequently used pre-treatments for main agricultural wastes in process of biogas production are also introduced.

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“…In order to improve the hydrolysis of larger molecules of organic matter, a pretreatment stage can be implemented. It can employ technologies divided into three groups: physical methods (thermal pretreatment, sonification, manipulation of physicochemical parameters), chemical ones (acid, alkaline, or enzymatic processing), and ensiling . Acceleration of the first stage facilitates the course of the subsequent stage and has a significant effect on the efficiency of the process and the amount of biogas yield.…”

Section: Stages Of Admentioning

confidence: 99%

“…It can employ technologies divided into three groups: physical methods (thermal pretreatment, sonification, manipulation of physicochemical parameters), chemical ones (acid, alkaline, or enzymatic processing), and ensiling. [54][55][56][57] Acceleration of the first stage facilitates the course of the subsequent stage and has a significant effect on the efficiency of the process and the amount of biogas yield. Slow degradation of substrates submitted to AD, particularly substrates with a high content of solids in the suspension, may even lead to the complete inhibition of the process.…”

Section: Hydrolysismentioning

confidence: 99%

Intensification of biogas production using various technologies: A review

et al. 2020

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Summary Anaerobic digestion (AD) is an organic matter conversion technology which offers a wide range of options for production of biogas from organic biomass, providing an excellent opportunity to convert abundant bioresources into safe, eco‐friendly, renewable energy. Important factors in the process of AD are the biodiversity of microorganisms, chemical load of oxygen demand, and content of water and total solids. A challenge for the future is to find technologies that will maximally enhance biogas production and to find pathways for biogas to supersede well‐established technologies and practices in the contemporary heavily fossil fuel‐based energy system. Current studies on technologies of biogas production indicate a number of possibilities of using appropriate biological and physicochemical additives, like added enzymes or fruit pomace, as well as immobilizing microorganisms on biofilters. Anaerobic biorefinery is an emerging concept that generates not only bioenergy but also high‐value biochemical products from the same feedstock. This study is a review of articles describing the intensification of biogas production by using various technologies.

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Enhanced Biogas Production from Rice Husk Through Solid-State Chemical Pretreatments

Cited by 19 publications

References 47 publications

Experimental Study of Increase of Biogas Production from Lagoon Station's Sludge by Alkaline Pretreatment

Experimental Study of Increase of Biogas Production from Lagoon Station's Sludge by Alkaline Pretreatment

Effective Pre-Treatments for Enhancement of Biodegradation of Agricultural Lignocellulosic Wastes in Anaerobic Digestion – A Review

Intensification of biogas production using various technologies: A review

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