title: Effect of Different Sugar Beet Pulp Pretreatments on Biogas Production Efficiency.
abstract: The objective of this study was to determine the effect of different sugar beet pulp (SBP) pretreatments on biogas yield from anaerobic digestion. SBP was subjected to grinding, thermal-pressure processing, enzymatic hydrolysis, or combination of these pretreatments. It was observed that grinding of SBP to 2.5-mm particles resulted in the cumulative biogas productivity of 617.2 mL/g volatile solids (VS), which was 20.2 % higher compared to the biogas yield from the not pretreated SBP, and comparable to that from not ground, enzymatically hydrolyzed SBP. The highest cumulative biogas productivity, 898.7 mL/g VS, was obtained from the ground, thermal-pressure pretreated and enzymatically hydrolyzed SBP. The latter pretreatment variant enabled to achieve the highest glucose concentration (24.765 mg/mL) in the enzymatic hydrolysates. The analysis of energy balance showed that the increase in the number of SBP pretreatment operations significantly reduced the gain of electric energy.
authors.affiliation: Faculty of Biotechnology and Food Sciences, Institute of Fermentation Technology and Microbiology, Lodz University of Technology, 171/173 Wolczanska Str, 90-9254, Lodz, Poland. ziemin@interia.pl.
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Ziemiński
authors.affiliation: Faculty of Biotechnology and Food Sciences, Institute of Fermentation Technology and Microbiology, Lodz University of Technology, 171/173 Wolczanska Str, 90-9254, Lodz, Poland.
authors.forename: Monika
authors.initials: M
authors.lastname: Kowalska-Wentel
mesh_terms: D027461:Beta vulgaris / Q000737:chemistry*; D056804:Biofuels; D005947:Glucose / Q000737:chemistry*; D006358:Hot Temperature
chemical_list: D056804:Biofuels; D005947:Glucose
keywords: Anaerobic digestion; Enzymatic hydrolysis; Gompertz model; Grinding; Thermal-pressure pretreatment