Latest Research on Biogas Production: Jan – 2020

Biogas production: current state and perspectives

Anaerobic digestion of energy crops, residues, and wastes is of accelerating interest so as to scale back the greenhouse emission emissions and to facilitate a sustainable development of energy supply. Production of biogas provides a flexible carrier of renewable energy, as methane are often used for replacement of fossil fuels in both heat and power generation and as a vehicle fuel. For biogas production, various process types are applied which may be classified in wet and dry fermentation systems. most frequently applied are wet digester systems using vertical stirred tank digester with different stirrer types hooked in to the origin of the feedstock. Biogas is especially utilized in engine-based combined heat and power plants, whereas microgas turbines and fuel cells are expensive alternatives which require further development work for reducing the prices and increasing their reliability. [1]

Trace compounds of biogas from different biogas production plants

Biogas composition and variation in three different biogas production plants were studied to supply information concerning its potential use as biofuel. Methane, CO2 , oxygen, nitrogen, volatile organic compounds (VOCs) and sulphur compounds were measured in samples of biogases from a landfill, sewage treatment plant sludge digester and farm biogas plant. Methane content ranged from 48% to 65%, CO2 from 36% to 41% and nitrogen from. [2]

Pretreatment of Lignocellulosic Wastes to Improve Ethanol and Biogas Production: A Review

Lignocelluloses are often a serious or sometimes the only components of various waste streams from various industries, forestry, agriculture and municipalities. Hydrolysis of those materials is that the initiative for either digestion to biogas (methane) or fermentation to ethanol. However, enzymatic hydrolysis of lignocelluloses with no pretreatment is typically not so effective due to high stability of the materials to enzymatic or bacterial attacks. this work is devoted to reviewing the methods that are studied for pretreatment of lignocellulosic wastes for conversion to ethanol or biogas. Effective parameters in pretreatment of lignocelluloses, like crystallinity, accessible area , and protection by lignin and hemicellulose are described first. Then, several pretreatment methods are discussed and their effects on improvement in ethanol and/or biogas production are described. [3]

Intrinsic molecular insights to enhancement of biogas production from kitchen refuse using alkaline-microwave pretreatment

The current study analyzed and optimized the concentration of NaOH for alkaline pretreatment of kitchen refuse for biogas production. Also, the advantages of microwave assistance in enhanced biogasification of kitchen refuse were evaluated. The TS, VS and structural changes were compared using standard experimental techniques. Molecular dynamics was investigated for the molecular level changes resulting in higher biogasification in NaOHmicrowave combined pretreatment. The methane and biogas yields were calculated to validate the advantages of microwave assistance in efficient biogasification. The NaOH-microwave combined pretreatment showed higher VS production. Microwave treatment degraded and removed lignin more efficiently. [4]

Effect of Pre Digestion Time on Efficiency of Biogas Production

Aims: Waste-to-Energy transformation has been identified as a veritable option within the integrated waste management processing of Municipal Solid Waste. the utilization of biogas technology to supply energy and organic from organic waste initially from livestock farm waste and agro-industrial waste may be a potential way of MSW management.

The aim of this study was to work out the optimum time required for pre digestion of solid wastes before biogas production process begun.

Study Design: the study designed to work on two batches and two phase experiments; the primary batch was materials composted in four weeks and therefore the second batch was in fortnight time so as to ascertain which era are going to be effective on biogasification. [5]

Reference

[1] Weiland, P., 2010. Biogas production: current state and perspectives. Applied microbiology and biotechnology, 85(4), (Web Link)

[2] Rasi, S., Veijanen, A. and Rintala, J., 2007. Trace compounds of biogas from different biogas production plants. Energy, 32(8), (Web Link)

[3] Taherzadeh, M. and Karimi, K., 2008. Pretreatment of lignocellulosic wastes to improve ethanol and biogas production: a review. International journal of molecular sciences, 9(9), (Web Link)

[4] Intrinsic molecular insights to enhancement of biogas production from kitchen refuse using alkaline-microwave pretreatment
Puneet Kumar Singh, Suresh K. Verma, Sanjay Kumar Ojha, Pritam Kumar Panda, Haragobinda Srichandan, Ealisha Jha & Snehasish Mishra
Scientific Reports volume 9, (Web Link)

[5] Chanzi, G. and Salim, C. (2018) “Effect of Pre Digestion Time on Efficiency of Biogas Production”, Current Journal of Applied Science and Technology, 27(4), (Web Link)

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