Biogas production from waste pulps of cassava (Manihot esculenta Crantz) via anaerobic digestion
Cassava waste pulps (CWPs) from starch industries demand attention for sustainable disposal. This study explores anaerobic digestion of CWP with pig manure, optimizing conditions for biogas production. Gas chromatography reveals significant biohydrogen concentration (18.69 ± 1.71%), offering promising, low-emission energy. CWPs show potential for valuable biogas generation, benefiting both industry and environment.
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- March 23, 2024
Biogas from cassava peels waste
The study investigates biogas and biofertilizer production from cassava peels waste inoculated with cow dung in Nigeria. Various pretreatment chemicals were used, and six batch anaerobic biodigesters were employed for 40 days. Stale cassava peels with NH4Cl pretreatment yielded the highest biogas production (2540 cm3/day) and methane yield (62.3%). Digester sludge demonstrated good biofertilizer qualities.
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- March 23, 2024
Evaluation of the environmental performance of bioethanol from cassava pulp using life cycle assessment
This study assesses the environmental impact of bioethanol from cassava pulp as transport fuel. Optimal scenarios include biogas use for steam and economic pulp allocation. Ethanol outperforms gasoline in greenhouse gas reduction, with E85 yielding the highest savings. Despite E85's negative effects on certain aspects, its overall impact remains lower than gasoline.
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- March 23, 2024
Single-step ethanol production from raw cassava starch using a combination of raw starch hydrolysis and fermentation, scale-up from 5-L laboratory and 200-L pilot plant to 3000-L industrial fermenters
This research focuses on single-step ethanol production by combining raw cassava starch hydrolysis and fermentation. It aims to optimize conditions for this process, achieving high yields across laboratory, pilot, and industrial scales. Ethanol concentrations obtained rival those from commercial industries using molasses and hydrolyzed starch, demonstrating feasibility and scalability.
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- March 23, 2024
Impacts of climate change on cassava yield and lifecycle energy and greenhouse gas performance of cassava ethanol systems: An example from Guangxi Province, China
Climate change threatens bio-crop viability. Studying cassava-to-ethanol in Guangxi, China, a model predicts yield declines due to temperature rises. Life cycle analysis shows decreasing energy value and rising emissions, notably in high concentration pathways. Yield declines are steeper in hilly regions, jeopardizing energy advantages. Lower concentration pathways and plains cultivation offer resilience.
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- March 23, 2024
Cellulase-added cassava ethanol process boosts ethanol titer and reduces glycerol production
A bolt-on cellulase-added ethanol process was developed to utilize cellulose in cassava tuber, alongside starch, for bioethanol production. This enhanced process increased ethanol titer by converting cellulose, resulting in higher ethanol concentration and reduced glycerol production. The decrease in glycerol was attributed to reduced medium viscosity caused by cellulase addition, highlighting improved efficiency and reduced waste in cassava ethanol production.
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- March 23, 2024
Economic and Environmental Assessment of Different Biogas Conversion Technologies for Cassava Pulp Treatment in Thailand: A Case Study
This study examines the economic and environmental impact of various biogas conversion technologies for cassava pulp treatment. Anaerobic cover lagoon (ACL), modified cover lagoon (MCL), and anaerobic baffled reactors (ABR) emerged as most suitable based on investment cost. ACL and MCL offer high NPV, IRR, and short payback periods due to low overall costs.
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- March 23, 2024
Cassava starch: Chemical modification and its impact on functional properties and digestibility, a review
This review examines the chemical modification of cassava starch to enhance its functional properties and health benefits. Chemical treatments are commonly used to alter starch composition and structure for industrial applications. The review highlights variations in composition, morphology, and digestibility compared to native starch. Understanding these modifications can optimize processing conditions and promote the utilization of modified cassava starch in various industries.
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- March 23, 2024
An assessment of social sustainability of sugarcane and cassava cultivation in Thailand
Sugarcane and cassava, key crops in Thailand, vie for land resources. Social Life Cycle Assessment (S-LCA) was employed to gauge their social impact. Stakeholders like workers, farm owners, machine owners, and the local community were assessed. Key indicators encompassed fair wages, health and safety, working conditions, economic growth, technology access, market security, and employment. Cassava exhibited slightly superior social performance, despite both crops rated highly. Sugarcane, however, is recommended for promotion due to yield and demand expectations, albeit facing challenges.
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- March 23, 2024
Rheological characteristics and genotype correlation of cassava root for very high gravity ethanol production: The influence of cassava varieties and harvest times
This study investigates how the rheological properties of native cassava affect very high gravity (VHG) ethanol fermentation, influencing heat and mass transfer, mixing energy, and overall yield. Evaluation of six cassava varieties across different harvest times reveals genotype correlations, with Rayong 11 at 15 months showing the highest ethanol concentration and yield.
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- March 23, 2024