Process optimization for ethanol production from photoperiod-sensitive sorghum: Focus on cellulose conversion

Xu, Feng; Theerarattananoon, Karnnalin; Wu, Xiaorong; Peña, Leidy; Shi, Yong‐Cheng; Staggenborg, Scott A.; Wang, Donghai

doi:10.1016/j.indcrop.2011.04.012

Cited by 19 publications

(11 citation statements)

References 24 publications

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“…13 Previous studies using SSF reported successful ethanol production from cellulosic biomass. 23 Since the optimized temperature for enzymatic hydrolysis (e.g., 50 °C) and yeast-ethanol fermentation (e.g., 30 °C when using wild type yeast) are different, developing a controlled temperature strategy is critical for a successful high-solid fed-batch SSF. For example, a recent study using delayed SSF, in which the initial temperature was 45 °C for 12 hours pre-saccharification and was then cooled to 30 °C for SSF, showed improved yield and productivity.…”

Section: Towards Sustainable Bioethanol Production Using One-pot Hg Pmentioning

confidence: 99%

Transforming biomass conversion with ionic liquids: process intensification and the development of a high-gravity, one-pot process for the production of cellulosic ethanol

Sun

Konda

et al. 2016

Energy Environ. Sci.

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215

190

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Producing concentrated sugars and minimizing water usage are key elements in the economics and environmental sustainability of advanced biofuels. Conventional pretreatment processes that require a water-wash step can result in losses of fermentable sugars and generate large volumes of wastewater or solid waste. To address these problems, we have developed high gravity biomass processing with a one-pot conversion technology that includes ionic liquid pretreatment, enzymatic saccharification, and yeast fermentation for the production of concentrated fermentable sugars and high-titer cellulosic ethanol. The use of dilute bio-derived ionic liquids (a.k.a. bionic liquids) enables one-pot, high-gravity bioethanol production due to their low toxicity to the hydrolytic enzyme mixtures and microbes used. We increased biomass digestibility at >30 wt% by understanding the relationship between ionic liquid and biomass loading, yielding 41.1 g L -1 of ethanol (equivalent to an overall yield of 74.8% on a glucose basis)using an integrated one-pot fed-batch system. Our technoeconomic analysis indicates that the optimized one-pot configuration provides significant economic and environmental benefits for cellulosic biorefineries by reducing the amount of ionic liquid required by ~90% and pretreatment-related water inputs and wastewater generation by ~85%. In turn, these improvements can reduce net electricity use, greenhouse gas-intensive chemical inputs for wastewater treatment, and waste generation. The result is an overall 40% reduction in the cost of cellulosic ethanol produced and a reduction in local burdens on water resources and waste management infrastructure.

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Section: Towards Sustainable Bioethanol Production Using One-pot Hg Pmentioning

confidence: 99%

Transforming biomass conversion with ionic liquids: process intensification and the development of a high-gravity, one-pot process for the production of cellulosic ethanol

Sun

Konda

et al. 2016

Energy Environ. Sci.

Self Cite

215

190

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“…Systems that include both annual and perennial crops could maintain stable feedstock supplies within close proximity to processing facilities, an important consideration for bulky cellulosic feedstocks (Mitchell et al, 2012) and also sustain or possibly enhance long-term soil quality (McGowan et al, 2018). Retiring a set percentage of declining perennial stands each year and producing annual crops for a set number of years would maintain a consistent supply of the various types of feedstocks, which are likely to have unique processing optima (Xu et al, 2011). Although they produced roughly half as much ethanol yield potential as annual crops, perennial crops are uniquely adapted for marginal or contaminated land, providing opportunities for economic return as well as phytostabilization or phytoremediation of such sites (Pidlisnyuk et al, 2014;Pogrzeba et al, 2017;Varvel et al, 2008;Yost et al, 2017).…”

Section: Potential Ethanol Productionmentioning

confidence: 99%

Long‐term Biomass and Potential Ethanol Yields of Annual and Perennial Biofuel Crops

et al. 2019

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Although energy crops could eventually supply a growing portion of cellulosic biofuel feedstocks, long-term comparisons of annual and perennial crops are rare. An experiment was established in 2007 near Manhattan, KS, to compare biomass productivity and ethanol yield of perennial and annual crops. Perennial crops included three C4 grasses: switchgrass (Panicum virgatum L.), big bluestem (Andropogon gerardii Vitman), and miscanthus (Miscanthus sacchariflorus). Annual C4 crops were corn (Zea mays L.) in two rotations: continuous and rotated with soybean [Glycine max (L.) Merr.]; and five types of sorghum [Sorghum bicolor (L.) Moench]: photoperiod sensitive, sweet, dual purpose (grain and biomass), brown mid-rib, and grain; all rotated with soybean. Annual crops produced 7 Mg ha-1 yr-1 more biomass than perennial crops throughout 11 yr, with sweet sorghum exceeding 22 Mg ha-1 yr-1 , and 12 m 3 ha-1 yr-1 of ethanol. Biomass yield of miscanthus approached 14 Mg ha-1 yr-1 , essentially the same as for several annual crops but with half as much fertilizer nitrogen. Annual ethanol production from miscanthus and switchgrass was 3.6 m 3 ha-1 yr-1 , half as much as that of several annual crops that produced similar biomass yields. Big bluestem consistently produced the least biomass and ethanol, less than 7 Mg ha-1 yr-1 and 1.7 m 3 ha-1 yr-1 , respectively. Rotated corn averaged 7.1 m 3 ha-1 yr-1 of ethanol. Eleven years of results indicate that annual corn and sorghum crops as well as perennial grasses such as miscanthus and switchgrass could play a role as potential bioenergy feedstocks in diversified production systems.

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“…Our previous study showed that pretreatment temperature was one of the most significant factors affecting biomass digestibility (Xu et al, 2011b). Thus, this study was designed to understand how the biomass structure changes at different temperatures.…”

Section: Compositional Changes Of the Ps Sorghum After Acid Pretreatmentmentioning

confidence: 99%

Towards understanding structural changes of photoperiod-sensitive sorghum biomass during sulfuric acid pretreatment

Shi

Wang

2013

Bioresource Technology

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Process optimization for ethanol production from photoperiod-sensitive sorghum: Focus on cellulose conversion

Cited by 19 publications

References 24 publications

Transforming biomass conversion with ionic liquids: process intensification and the development of a high-gravity, one-pot process for the production of cellulosic ethanol

Transforming biomass conversion with ionic liquids: process intensification and the development of a high-gravity, one-pot process for the production of cellulosic ethanol

Long‐term Biomass and Potential Ethanol Yields of Annual and Perennial Biofuel Crops

Towards understanding structural changes of photoperiod-sensitive sorghum biomass during sulfuric acid pretreatment

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