High dry matter whole-plant corn as a biomass feedstock

Cook, David E.; Shinners, K. J.; Weimer, Paul J.; Muck, R. E.

doi:10.1016/j.biombioe.2014.02.026

Cited by 9 publications

(12 citation statements)

References 8 publications

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“…The manipulation of miR156 expression could be particularly useful when combined with developmental changes that are regulated by other miRNAs (Jin et al ., ; Zhou and Luo, ). For more traditional bioenergy crops such as maize, where seed starch is used for ethanol production, the manipulation of flowering would not be desirable, even if more biomass could be gained for the ‘stover’ used to produce cellulosic biofuels (Cook et al ., ). Plant sugar content also influences flowering time in Arabidopsis by regulating miR156.…”

Section: Mir156 Plays a Versatile Role In Development Recalcitrancementioning

confidence: 97%

Manipulating microRNAs for improved biomass and biofuels from plant feedstocks

Trumbo

Zhang

Stewart

2015

Plant Biotechnology Journal

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SummaryPetroleum-based fuels are nonrenewable and unsustainable. Renewable sources of energy, such as lignocellulosic biofuels and plant metabolite-based drop-in fuels, can offset fossil fuel use and reverse environmental degradation through carbon sequestration. Despite these benefits, the lignocellulosic biofuels industry still faces many challenges, including the availability of economically viable crop plants. Cell wall recalcitrance is a major economic barrier for lignocellulosic biofuels production from biomass crops. Sustainability and biomass yield are two additional, yet interrelated, foci for biomass crop improvement. Many scientists are searching for solutions to these problems within biomass crop genomes. MicroRNAs (miRNAs) are involved in almost all biological and metabolic process in plants including plant development, cell wall biosynthesis and plant stress responses. Because of the broad functions of their targets (e.g. auxin response factors), the alteration of plant miRNA expression often results in pleiotropic effects. A specific miRNA usually regulates a biologically relevant bioenergy trait. For example, relatively low miR156 overexpression leads to a transgenic feedstock with enhanced biomass and decreased recalcitrance. miRNAs have been overexpressed in dedicated bioenergy feedstocks such as poplar and switchgrass yielding promising results for lignin reduction, increased plant biomass, the timing of flowering and response to harsh environments. In this review, we present the status of miRNA-related research in several major biofuel crops and relevant model plants. We critically assess published research and suggest next steps for miRNA manipulation in feedstocks for increased biomass and sustainability for biofuels and bioproducts.

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Section: Mir156 Plays a Versatile Role In Development Recalcitrancementioning

confidence: 97%

Manipulating microRNAs for improved biomass and biofuels from plant feedstocks

Trumbo

Zhang

Stewart

2015

Plant Biotechnology Journal

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“…The duration of the harvest window in harvest & collection impacted costs significantly, with a moderate cost decrease when the window was increased from 92 to 123 days ($3.45/tonne decrease) and a drastic increase experienced with the decrease in the window from 92 to 42 days ($8.98/tonne increase). Reported harvest windows for corn grain vary widely by state (U.S Department of Agriculture, 2010; Oyedeji et al, 2017) and the corn stover harvest expands that window based on the reliance of field drying in windrows; one advantage of the proposed chopped logistics system is that the harvest window can be expanded due to the fact that it is not reliant on field drying of the stover Cook et al, 2014). The remaining variables presented in the sensitivity analysis, including diesel and electricity price as well as dry matter loss in storage, resulted in fluctuations of < $3/tonne.…”

Section: Sensitivity Analysismentioning

confidence: 99%

Techno-Economic Assessment of a Chopped Feedstock Logistics Supply Chain for Corn Stover

et al. 2018

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Storing corn stover in wet, anaerobic conditions is an active management approach to reduce the risk of significant aerobic degradation and catastrophic loss due to fire. An estimated 50% of the corn stover available in the U.S. is too wet at the time of harvest to be stored safely in baled formats and is compatible with wet, anaerobic storage through ensiling. A logistics system based on field-chopping and particle size reduction early in the supply chain removes the dependency on field-drying of corn stover prior to baling, allows for an expanded harvest window, results in diminished size reduction requirements at the biorefinery, and is compatible with ensiling as a storage approach. The unit operations were defined for this chopped logistics system, which included field chopping, bulk transportation to a biorefinery site, on-site preprocessing to meet biorefinery size and ash specifications, industrial-scale storage through ensiling, and delivery of corn stover at a rate of 2,000 tonnes per day for ∼50% of the year. The chopped system was compared to the conventional bale system for 30% moisture (wet basis) corn stover, a likely delivered moisture content for baled corn stover harvested wet. Techno-economic analysis showed that the chopped logistics system is cost competitive, costing only 10% more than the baled logistics system, meanwhile reducing the energy consumption by 48% and greenhouse gas release by 60%. In summary, a chopped logistics system utilizing on-site preprocessing and storage at a biorefinery gate is an economically viable approach to provide a stable source of corn stover for use when dry bales are not available, meanwhile reducing the risk of loss in long-term storage.

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“…10 Field efficiencies were assumed to be comparable with grain, silage, and baling operations reported in ASABE standard D497. 7.…”

Section: Methodsmentioning

confidence: 99%

“…and Shinners et al ., 6 respectively. Alternatively, in single‐stream systems, the grain and stover are harvested, transported, and stored together as a whole plant 7 . A whole‐plant corn feedstock has many potential advantages, including reducing the number of field operations for harvest, lengthening the harvest window, enabling co‐transport and storage of grain and stover, eliminating the need for grain drying, and reducing stover dry matter losses through anaerobic storage.…”

Section: Introductionmentioning

confidence: 99%

Techno‐economic assessment of single‐stream feedstock logistics supply chain for corn stover and grain

Hemmelgarn

Lin

Wendt

et al. 2022

Biofuels Bioprod Bioref

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The state-of-technology for corn stover harvest is a multi-pass system that collects the stover after grain harvest. An alternative is a single-stream system where the grain and stover are harvested as a bulk material co-stored and preserved by anerobic fermentation, and finally, co-transported to a biorefinery. In the present work, four single-pass whole-plant bulk systems were compared with a conventional multi-pass bale system. The single-stream systems consisted of the harvest of corn grain and a portion of the stover fraction. Four machine configurations were simulated. This work predicted that a multi-pass bale system would result in a material cost of 111.80 $2021 Mg -1 stover DM delivered to the biorefinery gate. Alternatively, the lowest cost single-stream system was the self-propelled forage harvester (SPFH) configured with the whole-plant header, which delivered feedstock for 74.76 $2021 Mg stover DM -1 . In addition to machine configuration, a sensitivity analysis was performed to understand important drivers of feedstock cost. These analyses revealed that feedstock cost increased with moisture content, fertilizer price, and biorefinery size, and decreased with harvest season length, crop yield, and grower participation. This work demonstrated that single-stream systems could reduce corn stover feedstock costs in comparison with state-of-technology systems.

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High dry matter whole-plant corn as a biomass feedstock

Cited by 9 publications

References 8 publications

Manipulating microRNAs for improved biomass and biofuels from plant feedstocks

Manipulating microRNAs for improved biomass and biofuels from plant feedstocks

Techno-Economic Assessment of a Chopped Feedstock Logistics Supply Chain for Corn Stover

Techno‐economic assessment of single‐stream feedstock logistics supply chain for corn stover and grain

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