Abstract
Some types of biomass require great inputs to guarantee high conversion rates to methane. The complex structure of lignocellulose impedes its penetration by cellulolytic enzymes, as a result of which a longer retention time is necessary to increase the availability of nutrients. To use the full biogas potential of lignocellulosic substrates, a substrate pretreatment is necessary before the proper methane fermentation. This article discusses the impact of the pretreatment of maize silage with a pulsed electric field on biogas productivity. The experiment showed a slight decrease in cellulose, hemicellulose and lignin content in the substrate following pretreatment with a pulsed electric field, which resulted in a higher carbohydrate content in the liquid substrate fraction. The highest biogas production output was obtained for the pretreated sample at the retention time of 180 s for 751.97 mL/g volatile solids (VS), which was approximately 14% higher than for the control sample. The methane production rate for the control sample was 401.83 mL CH4/g VS, and for the sample following disintegration it was 465.62 mL CH4/g VS. The study found that pretreatment of maize silage with a pulsed electric field increased the biogas potential.
Highlights
The global energy demand continues to grow, and reserves of non-renewable fossil fuels have been depleting through continuous exploitation
This study aimed to determine the effect of pretreatment with a pulsed electric field on the biogas potential of maize silage
The analyses of the charge subjected to disintegration at the assumed retention times showed that the Total organic carbon (TOC) content was the highest at the pretreatment time of 180 s, while the mean TOC
Summary
The global energy demand continues to grow, and reserves of non-renewable fossil fuels have been depleting through continuous exploitation. Biofuel production consumes large amounts of raw materials that can be used in food production This adverse economic and social phenomenon, has encouraged scientists to search for alternative solutions that use waste materials. In terms of availability and quantity, waste containing lignocellulose complex is the most common raw material This biomass is considered to be the most common source of carbon on earth [2]. There has been a trend toward the development of new technologies which use lignocellulosic waste for energy production The use of these raw materials is associated with the need to solve several problems resulting from the complicated structure of the lignocellulosic complex, which makes it difficult for cellulolytic enzymes to penetrate the raw material
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