Bridging the gap between feedstock growers and users: the study of a coppice poplar-based biorefinery

Dou, Chang; Gustafson, Rick; Bura, Renata

doi:10.1186/s13068-018-1079-y

Cited by 11 publications

(12 citation statements)

References 27 publications

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“…For all the untreated biomass and the preprocessed biomass, 300 g sample on an oven-dried (OD) basis was impregnated with 3% (w/w) SO 2 overnight, and then steam pretreated at 195 °C for 5 min in a 2.7-L batch reactor (Aurora Technical, Savona, BC, Canada) [ 15 ]. After steam explosion, the pretreated biomass slurry was separated into solid and liquid fractions using vacuum filtration.…”

Section: Methodsmentioning

confidence: 99%

“…Klason lignin content was determined by gravimetric methods by filtration through tared sintered glass crucibles. After filtration, the carbohydrate and acetyl composition of the filtrate were analyzed by HPLC, and the acid-soluble lignin in the filtrate was analyzed by UV/Vis spectrophotometer (Shimadzu, Tokyo, Japan) at 205 nm [ 15 ].…”

Section: Methodsmentioning

confidence: 99%

“…Depending on the biomass species and the growing conditions, the NSC can make up more than 20% of the woody biomass [ 10 , 15 ]. Their presence will reduce the bioconversion yield, since these are typically non-fermentable compounds.…”

Section: Introductionmentioning

confidence: 99%

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Removal of non-structural components from poplar whole-tree chips to enhance hydrolysis and fermentation performance

Hörhammer

Dou

Gustafson

et al. 2018

Biotechnol Biofuels

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BackgroundWhole-tree chips will be a likely feedstock for future biorefineries because of their low cost. Non-structural components (NSC), however, represent a significant part of whole-tree chips. The NSC can account for more than 10% of whole-tree poplar mass when the trees are grown in short rotation cycles. The influence of NSC, however, on the production of fuels and chemicals is not well known. In this study, we assessed the impact of NSC removal from poplar whole-tree chips on pretreatment and enzymatic hydrolysis yields, overall sugar recovery, and fermentation yield. In addition, we evaluated the economics of preprocessing as a new unit operation in the biorefinery.ResultsPoplar whole-tree chips were preprocessed by neutral or acidic washing before steam pretreatment, enzymatic hydrolysis, and fermentation. Preprocessing of poplar reduced ash and extractives content as much as 70 and 50%, respectively. The overall sugar yield after pretreatment and hydrolysis was 18–22% higher when the biomass had been preprocessed, which was explained by higher sugar yields in liquid fraction and more efficient enzymatic hydrolysis of the solid fraction. The liquid fraction ethanol fermentation yield was 36–50% higher for the preprocessed biomass.ConclusionsIt appears that preprocessing reduced the buffering capacity of the biomass due to ash removal, and thereby improved the enzymatic hydrolysis. Removal of extractives during preprocessing improved the fermentation yield. The economic modeling shows that a preprocessing unit could have significant economic benefits in a biorefinery, where poplar whole-tree chips are used as bioconversion feedstock.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Removal of non-structural components from poplar whole-tree chips to enhance hydrolysis and fermentation performance

Hörhammer

Dou

Gustafson

et al. 2018

Biotechnol Biofuels

Self Cite

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“…To illustrate, research at Oak Ridge National Laboratory's Bioenergy Research Center demonstrated a 15% increase in sugar yield associated with the biochemical conversion of low-lignin poplar varieties [37]. AHB research confirms this with reports of increases of 19% in sugar yield leading to 10% increases in biorefinery revenue that accompany individual hybrid selections [38]. However, it should be recognized that achieving these gains in large-scale plantations where soil quality and water supply vary at the landscape scale will be challenging.…”

Section: Discussionmentioning

confidence: 90%

The Economics of Rapid Multiplication of Hybrid Poplar Biomass Varieties

Stanton

Haiby

Gantz

et al. 2019

Forests

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Background: Poplar (Populus spp.) hybridization is key to advancing biomass yields and conversion efficiency. Once superior varieties are selected, there is a lag in commercial use while they are multiplied to scale. Objective: The purpose of this study was to assess the influence of gains in biomass yield and quality on investment in rapid propagation techniques that speed the time to commercial deployment. Material and Methods: A factorial experiment of propagation method and hybrid variety was conducted to quantify the scale-up rate of in vitro and greenhouse clonal multiplication. These data were used in modeling the internal rate of return (IRR) on investment into rapid propagation as a function of genetic gains in biomass yield and quality and compared to a base case that assumed the standard method of supplying operational varieties in commercial quantities from nurseries as hardwood cuttings, capable of yields of 16.5 Mg ha−1 year−1. Results: Analysis of variance in macro-cutting yield showed that propagation method and varietal effects as well as their interaction were highly significant, with hedge propagation exceeding serial propagation in macro-cutting productivity by a factor of nearly 1.8. The Populus deltoides × P. maximowiczii and the Populus trichocarpa × P. maximowiczii varieties greatly exceeded the multiplication rate of the P. × generosa varieties due to their exceptional response to repeated hedging required to initiate multiple tracks of serial propagation. Analyses of investment into rapid propagation to introduce new material into plantation establishment followed by a 20-year rotation of six coppice harvests showed that gains in biomass yield and quality are warranted for a commitment to rapid propagation systems. The base case analysis was generally favored at yields up to 18 Mg−1 year−1 dependent on pricing. The rapid multiplication analysis proved superior to the base case analysis at the two highest yield levels (27.0 and 31.5 Mg ha−1 year−1,) at all price levels and at yields of 22.5 Mg−1 year−1, dependent on price and farm location. Conclusion: Rapid multiplication is a reliable method to move improved plant material directly into operations when valued appropriately in the marketplace.

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“…In a dynamic market environment, national food security stands on self-sufficiency, by the mean of the satisfaction of population's need for food especially with products from the domestic market (Lloyd et al, 2018;He et al, 2018;Luan et al, 2018;Ritchie et al, 2018). Sugar falls within the range of such products (Chunhawong et al, 2018;Dou et al, 2018;Pachón et al, 2018;Pincus, 2018). Sugar market occupies one of the central places in the food retail turnover in the country, followed by markets of confectionery and pasta, markets of flour, cereals, potatoes, bread and bakery products (Debnath and Babu, 2018;Hossain et al, 2018;Nieder-Heitmann et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Economic Assessment and Strategic Potential of Agro Industries: The Case of Sugar Industry

Fazrakhmanov¹,

LUKYANOVA²,

Kovshov³

et al. 2018

ERSJ

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Current economic activity in the beet sugar industry is below its highest point, and this encourages to search for and to shape specific development strategies. This article analyses the current state of Russian sugar markets, domestically and internationally. The investigation over the strategic potential of effective beet sugar sub-complex development has involved 78 large agricultural enterprises and 59 peasant farms of the Republic of Bashkortostan. By total production output, sugar beet producers are classified into several groups. The first group, which is the highest, includes 10 backbone strategic enterprises, which can produce 897.9 thousand tons of sugar beet. The second group includes 19 enterprises and produces 442.5 thousand tons of sugar beet. The third group, not a priority group, includes 43 enterprises (333.3 thousand tons). A similar classificationt was done for peasant farms. From the assessment encompassing the strategic potential of sugar beet industry certain scenarios have been considered such as: business-as-usual (72.2%), extensive growth (83.3%), intensive growth (100.0%) and hybrid growth (122.2%). These scenarios were composed to forecast the production target achievements. Forecasts were made using a model of strategic development of beet sugar sub-complex of the Republic of Bashkortostan, for the period until 2020. The approach developed in this article is recommended to be used as a guideline in developing long-term regional programs for agriculture development. It can be also addressed to adjust some measures that are being taken under the launched programs.

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Bridging the gap between feedstock growers and users: the study of a coppice poplar-based biorefinery

Cited by 11 publications

References 27 publications

Removal of non-structural components from poplar whole-tree chips to enhance hydrolysis and fermentation performance

Removal of non-structural components from poplar whole-tree chips to enhance hydrolysis and fermentation performance

The Economics of Rapid Multiplication of Hybrid Poplar Biomass Varieties

Economic Assessment and Strategic Potential of Agro Industries: The Case of Sugar Industry

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