首页|Recent advancements and challenges in the lignocellulosic and algal biomass-based bioethanol production: a review
Recent advancements and challenges in the lignocellulosic and algal biomass-based bioethanol production: a review
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NETL
NSTL
Taylor & Francis
The sustained increase in global energy needs and environmental impacts from greenhouse gases emitted by burning non-renewable fuels has led to a focus on developing renewable energy sources. Bioethanol can meet future energy demands of nations. Lignocellulosic feedstock and algal biomass are considered effective sources of substrates for converting fermentable sugars into ethanol. The structural configuration of lignin-based cellulosic biomass is modified using integrated pretreatment technologies, including physiochemical and biological methods. The hydrolysis of cellulose with cellulase enzymes consists of cellulase adsorption to the cellulosic surface, disintegration of cellulose polymers into simple sugar compounds, and desorption of cellulase. Soybean straw fermented in Thermoanaerobacterium aotearoense at 55 ℃ and 15 g/L total sugars provided 0.34 g/g ethanol yield. Rice straw feedstock hydrolyzed using cellulase enzymes at 30 ℃, 74 h, and pH 4.5 yielded 0.44 g/g ethanol. The macroalgae species Ulva rigida in solid-state fermentation using Saccharomyces cerevisiae at 37 ℃, pH 5, and 3 h yielded 330 mg/g glucose. The microalga Chlorella vulgaris hydrolyzed at 45 ℃, pH 6, and 48 h using amylases provided a 3.8 g/L ethanol yield. Different fermentation processes for converting reduced sugars into ethanol include submerged, solid-state, and very high-gravity fermentation.
Department of Chemical Engineering & Materials Science,Center of Excellence in Advanced Materials & Green Technologies,Amrita School of Engineering,Amrita Vishwa Vidyapeetham,Coimbatore,India
Advanced Manufacturing Research Centre, & Advanced Processing Technology Research Centre,School of Mechanical and Manufacturing Engineering,Dublin City University,Dublin,Ireland
NETL
NSTL
Taylor & Francis
