Cost analysis of cassava cellulose utilization scenarios for ethanol production on flowsheet simulation platform

Zhang, Jian; Fang, Zhenhong; Deng, Hongbo; Zhang, Xiaoxi; Bao, Jie

doi:10.1016/j.biortech.2013.02.041

Cited by 22 publications

(6 citation statements)

References 16 publications

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“…Generally, the starch can be found from plants, which grow in tropical-and sub-tropical lands the following corn, tubers, cassava, wheat, sago and rice (Nafchi et al, 2012;Puncha-Arnon & Uttapap, 2013). Actually, the raw starch biomass contents are starch itself and a small amount of cellulose, hemicellulose, and lignin (Zhang et al, 2013). The cassava starch has been investigated and attracted many scientists who developed them becoming more valuable materials, like modern food and alcohol (Souto et al, 2016;Silva et al, 2013;Gunawan et al, 2015;Pereira & Leonel, 2014).…”

Section: Introductionmentioning

confidence: 99%

The structural modification of cassava starch using a saline water pretreatment

et al. 2018

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The cassava has been modified successfully by using the saline water, which was abundantly available on the planet. The biomass was submerged in saline waters that salt concentrations were altered at 0, 3.5 percent (seawater) and 10 percent (w/w) and were kept 5 days. After recovery by washing steps, the treated solids were characterized by using XRD (X-ray diffraction), FTOR (Fourier transform infra-red), and SEM (Scanning electron microscopic). The results showed that the XRD pattern of saline water pretreatment decreased significantly. The biggest decrease of X-ray intensity occurred at around 18 o. Meanwhile, the fingerprint of FTOR revealed the transmittance intensity of infra-red ray of saline water treated solid inclined for all wave constant numbers, suggesting that many hydrogen bonds were disconnected. Those findings also were enhanced by SEM pictures that showed the change of surface morphology of treated biomass. Ot was indicative that cassava structure was modified becoming more textured after employing saline water pretreatment. This work is an innovative finding to gradually substitute commercial ionic liquids that are very expensive with saline water for biomass pretreatment.

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Section: Introductionmentioning

confidence: 99%

The structural modification of cassava starch using a saline water pretreatment

et al. 2018

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“…The activity of Youtell #6 was 145.0 FPU/g in the filter paper unit (FPU) and 344.0 IU/g in the cellobiase unit (IU) analyzed according to the protocol of NREL LAP-006 [11]. Youtell #6 is a commercial cellulase enzyme with comparable performance to the other commercial cellulases [12], [13], [14].…”

Section: Methodsmentioning

confidence: 99%

Process development of short-chain polyols synthesis from corn stover by combination of enzymatic hydrolysis and catalytic hydrogenolysis

Fang

Zhang

et al. 2014

Biotechnology Reports

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“…The objective is to predict the final yield under different field conditions, crop phenology, solar radiation and photosynthesis, levels of stress due to shortage of water, nitrogen and potassium. Zhang et al [33] analyzed the cost of using cellulase enzyme and stream energy in cassava-based ethanol product. A flowsheet simulation model of the system is constructed using Aspen Plus.…”

Section: Literature Reviewmentioning

confidence: 99%

Impacts of Harvesting Age and Pricing Schemes on Economic Sustainability of Cassava Farmers in Thailand under Market Uncertainty

2022

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This paper involves an analysis to determine appropriate cassava harvest practices and choose a pricing scheme between farmers and factories, cassava yards, and collectors in Thailand. Harvest practices represent all activities from land preparation to harvest. A key decision that governs the amount of resources required during cassava life cycle is the cassava’s harvesting age. The harvesting age can be from eight to 18 months in two patterns: fixed age, e.g., harvest every 12 months, and variable age, e.g., harvest at an age between 10 and 14 months. After harvesting, there are two common pricing schemes to consider, which are weight-based and starch-content-based. Factors that affect the two decisions made by Thai farmers at a given time are the market price, which highly varies within a season and between seasons, and yields in terms of weight and starch content, both of which change with cassava’s age and/or harvest month. Economic sustainability measure for Thai farmers is the average monthly profit that the farmers gain over cassava harvest cycle under uncertain market price. To handle uncertainties, a simulation model is constructed to imitate cassava planting activities from cultivation to harvest. The purpose is to evaluate various harvesting ages and two pricing schemes under uncertain cassava market prices. Market prices in 15 seasons (2006–2021) are grouped using the k-mean clustering into four price scenarios. As cassava grows in the simulation, the required resources are consumed until the decisions on harvesting time and pricing scheme are made with estimated selling probability under different price scenarios and uncertainty in cassava yield. Through simulation, harvesting age and pricing scheme that are most profitable and robust-to-system-variation are determined. Finally, a guideline for Thai farmers to choose a pricing scheme is developed based on the sensitivity analysis of the simulation model.

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Cost analysis of cassava cellulose utilization scenarios for ethanol production on flowsheet simulation platform

Cited by 22 publications

References 16 publications

The structural modification of cassava starch using a saline water pretreatment

The structural modification of cassava starch using a saline water pretreatment

Process development of short-chain polyols synthesis from corn stover by combination of enzymatic hydrolysis and catalytic hydrogenolysis

Impacts of Harvesting Age and Pricing Schemes on Economic Sustainability of Cassava Farmers in Thailand under Market Uncertainty

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