Techno-economic analysis of chemically catalysed lignocellulose biorefineries at a typical sugar mill: Sorbitol or glucaric acid and electricity co-production

Kapanji, Kutemba K.; Haigh, Kathleen F.; Görgens, Johann F.

doi:10.1016/j.biortech.2019.121635

Cited by 46 publications

(19 citation statements)

References 29 publications

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“…Pretreatment, which accounts for~35% of the total production cost, is an important step in order to utilize the carbohydrates in biomass [29,30]. To design an economical process, it is required to use the statistical method such as response surface methodology (RSM) [31].…”

Section: Introductionmentioning

confidence: 99%

Improved Sugar Recovery from Orange Peel by Statistical Optimization of Thermo-Alkaline Pretreatment

2021

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Orange peel, which is a by-product of oranges, contains carbohydrates that can be converted into sugars and used in the fermentation process. In this study, the thermal alkaline pretreatment process was chosen because of its simplicity and lesser reaction time. In addition, the reaction factors were optimized using response surface methodology. The determined optimal conditions were as follows: 60.1 g/L orange peels loading, 3% KOH and 30 min. Under the optimal conditions, glucan content (GC) and enzymatic digestibility (ED) were found to be 32.8% and 87.8%, respectively. Enzymatic hydrolysis was performed with pretreated and non-pretreated orange peels using three types of enzyme complex (cellulase, cellobiase and xylanase). The minimum concentrations of enzyme complex required to obtain maximum ED were 30 FPU (filter paper unit), 15 CBU (cellobiase unit), and 30 XNU (xylanase unit) based on 1 g-biomass. Additionally, ED of the treated group was approximately 3.7-fold higher than that of the control group. In conclusion, the use of orange peel as a feedstock for biorefinery can be a strategic solution to reduce wastage of resources and produce sustainable bioproducts.

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Section: Introductionmentioning

confidence: 99%

Improved Sugar Recovery from Orange Peel by Statistical Optimization of Thermo-Alkaline Pretreatment

2021

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“…Dry biomass availability of 65 t h -1 comprised of sugarcane bagasse (70 wt%) and harvest residues (30 wt%) with final mass composition of 40.7% cellulose, 27.1% hemicellulose, 21.9% lignin, 6.75% extractives (water and ethanol) and 3.5% ash were used as feedstock (dry mass of 65 tonne h -1 ) for the biorefinery scenarios. 8,30,31 This feedstock was based on data from a typical South African sugar mill. 8,32 The adapted composition was assumed to be applicable to the feedstock mixture comprising sugarcane bagasse and harvest residues.…”

Section: Methodsmentioning

confidence: 99%

Techno‐economics of one‐stage and two‐stage furfural production integrated with ethanol co‐production from sugarcane lignocelluloses

Ntimbani

Farzad

Görgens

2021

Biofuels Bioprod Bioref

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Lignocellulosic biomass processing to produce platform chemicals and biofuels is a promising alternative utilization of non-renewable resources. This study investigated the techno-economics of two-stage and one-stage furfural production integrated with ethanol co-production from sugarcane bagasse and harvest residues. The effect of process conditions on profitability was reflected by the minimum ethanol selling price (MESP) at a fixed furfural-selling price. Aspen Plus V8.8 was used to simulate the integrated two-stage furfural and ethanol co-production biorefineries using low (scenario 1), medium (scenario 2) and high (scenario 3) severity steam-explosion pretreatment. The two-stage furfural biorefineries integrated with ethanol co-production were compared with the most profitable one-stage furfural biorefinery integrated with ethanol co-production. The required MESP in scenario 2 (0.73 US$ L -1 ) was decreased by 36% compared with the one-stage furfural-ethanol biorefinery (1.14 US$ L -1 ). Scenarios 1 and 3 were disadvantaged by lower ethanol yields (150 versus 214 kg t -1 of feed) and higher capital investments (322-340) compared with scenario 2 (310 million US$). The onestage furfural production had higher heating demands (2034 versus 741-1124 kW t -1 feed) and reduced ethanol yields (90 versus 150-214 kg t -1 of feed) compared with integrated two-stage furfural and ethanol coproduction biorefineries. Optimization of process conditions, improving energy efficiency, and maximizing productivity within these energy self-sufficient facilities were critical to minimizing the MESPs, regardless of associated increases in capital and operational costs.

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“…Several processes including pretreatment, saccharification and fermentation should be performed to utilize lignocellulosic biomass in biorefinery [11]. It has been reported that pretreatment and enzymatic hydrolysis account for 35% of the total biorefinery cost [12]. In order to reduce the overall process cost, it is significant to derive the optimum reaction conditions for each step.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Enzymatic Glucose Conversion from Chestnut Shells through Optimization of KOH Pretreatment

Lee

et al. 2021

IJERPH

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Worldwide, about one-third of food produced for human consumption is wasted, which includes byproducts from food processing, with a significant portion of the waste still being landfilled. The aim of this study is to convert chestnut shells (CNSs) from food processing into a valuable resource through bioprocesses. Currently, one of the highest barriers to bioprocess commercialization is low conversion of sugar from biomass, and KOH pretreatment was suggested to improve enzymatic digestibility (ED) of CNS. KOH concentration of 3% (w/w) was determined as a suitable pretreatment solution by a fundamental experiment. The reaction factors including temperature, time and solid/liquid (S/L) ratio were optimized (77.1 g/L CNS loading at 75 °C for 2.8 h) by response surface methodology (RSM). In the statistical model, temperature and time showed a relatively significant effect on the glucan content (GC) and ED, but S/L ratio was not. GC and ED of the untreated CNS were 45.1% and 12.7%, respectively. On the other hand, GC and ED of pretreated CNS were 83.2% and 48.4%, respectively, and which were significantly improved by about 1.8-fold and 3.8-fold compared to the control group. The improved ED through the optimization is expected to contribute to increasing the value of byproducts generated in food processing.

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Techno-economic analysis of chemically catalysed lignocellulose biorefineries at a typical sugar mill: Sorbitol or glucaric acid and electricity co-production

Cited by 46 publications

References 29 publications

Improved Sugar Recovery from Orange Peel by Statistical Optimization of Thermo-Alkaline Pretreatment

Improved Sugar Recovery from Orange Peel by Statistical Optimization of Thermo-Alkaline Pretreatment

Techno‐economics of one‐stage and two‐stage furfural production integrated with ethanol co‐production from sugarcane lignocelluloses

Improvement of Enzymatic Glucose Conversion from Chestnut Shells through Optimization of KOH Pretreatment

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