Biorefinery based on olive biomass. State of the art and future trends

Romero‐García, Juan Miguel; Niño, Laura Catalina Gutiérrez; Martínez-Patiño, José Carlos; Alvarez, Cristina Engel de; Castro, Eulógio; Negro, M.J.

doi:10.1016/j.biortech.2014.03.062

Cited by 202 publications

(122 citation statements)

References 72 publications

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“…This renewable material resulting from the pruning labor is usually eliminated from fields by burning, consequently contributing to climate change. The content of sugars in this biomass, approximately 50%, makes the material a suitable feedstock for the production of bioethanol (Romero-García et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of Sulfuric Acid Pretreatment of Extracted Olive Tree Biomass Using Response Surface Methodology

et al. 2017

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Olive tree biomass (OTB) represents an interesting feedstock for bioethanol production. In this study, olive tree pruning was water extracted and pretreated by dilute sulfuric acid to achieve high sugar recoveries from cellulosic and hemicellulosic fractions. Temperature (160 to 200 °C), acid concentration (0 to 8 g acid/100 g extracted raw material), and solids loading (15% to 35% w/v) were selected as operation variables and modified according to a Box-Behnken experimental design. The optimal conditions for the acid pretreatment were 160 °C, 4.9 g sulfuric acid/100 g biomass, and 35% solids loading (w/v), according to multiple criteria that considered the maximization of both the hemicellulosic sugars concentration in prehydrolysate and the overall sugar yield. These optimized conditions yielded a sugar concentration of 79.8 g/L, corresponding to an overall yield of 39.8 g total sugars/100 g extracted OTB. The fermentability of hemicellulosic sugars prehydrolysates from the acid pretreatment was evaluated by Escherichia coli after a detoxification stage by overliming. The prehydrolysates with lower concentrations of toxic compounds were fermented and achieved ethanol yields higher than 80% of the theoretical ethanol yield.

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Section: Introductionmentioning

confidence: 99%

Design and Optimization of Sulfuric Acid Pretreatment of Extracted Olive Tree Biomass Using Response Surface Methodology

et al. 2017

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“…OMW contains sugars (1.6-4%), and phenolic compounds responsible for the difficulty of proper treatment (Romero-García et al, 2014). Worldwide annual OMW production is about 7 and 30 million m 3 , with an organic load equivalent to about 22 million people per year (Dermeche et al, 2013;Ntaikou et al, 2009).…”

Section: Olive Mill Wastewatermentioning

confidence: 99%

“…In the first case, Saccharomyces are used, while for the second option microorganisms that are able to ferment C5 sugars such as Pachysolen tannophilus, Candida shehatae and Pichia stipitis were used to valorize by-products. Sugars from cellulose and hemicellulose fraction could be converted to ethanol by either a simultaneous saccharification or fermentation (SSF) process or by a separated enzymatic hydrolysis and fermentation process (Romero-García et al, 2014). Cuevas, Sánchez, Bravo, García, and Baeza (2010) evaluated the influence of pretreatment conditions (temperature and acid concentration) on SSF of olive pruning debris using response-surface methodology and the fermenting yeast S. cerevisiae.…”

Section: Ethanol Productionmentioning

confidence: 99%

Valorization of winery and oil mill wastes by microbial technologies

Mateo

Maicas

2015

Food Research International

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“…Olive cultivation has also spread globally during past two decades due to the health benefits assigned to olive oil. In year 2013, global olive production exceeded 20 million tonnes (1,18,19). The liquid and solid non-food residues of these milling processes have great negative environmental impact on microbial population of soil, aquatic ecosystems and air (20).…”

Section: Introductionmentioning

confidence: 99%

“…Plant biomass components such as lignocellulosic residues have attracted more attention within the last two decades due to the rapid decrease in the amounts of fossil resources (1). Lately, many efforts have been employed for the conversion of biomass and other waste residues into new value-added products, within valorization approach (2).…”

Section: Introductionmentioning

confidence: 99%

Valorization of Olive-Oil Industry Solid Waste: Statistical Optimization of Alkaline Extraction Conditions for Light-Coloured Hemicelluloses

Kocabaş¹,

Yurtdaş²,

Demir³

2017

GIDA

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Olive solid waste (OSW), the by-product of olive oil production process, is a lignocellulosic material with very low economic value. The hemicellulose fraction of OSW has a potential to be used as a raw material for several industrial applications. The main objective of the present work was to statistically develop an alkaline hemicellulose extraction procedure to achieve the highest possible crude hemicellulose extraction yield from OSW with concurrent efforts to lighten the colour of black hemicelluloses. Box-Behnken Design based response surface methodology was employed for optimization. The optimum hemicellulose extraction conditions were found as 19.3% (w/v) alkaline (KOH) concentration, 1.3 mm particle size, 25.3 h extraction time, 1% (w/v) MgSO 4 concentration, 6.4% (v/v) H 2 O 2 concentration and 60°C temperature. The maximum experimental hemicelluloses yield at this condition was 35.6±0.5% which is in agreement with the predicted yield value of 31.2%. As a result, the extraction yield has been increased from 21.7% to 35.6% (w/w). The colour values (L*,a*,b*) of hemicelluloses extracted at optimum conditions were predicted as 31.69±0.28, -2.90±0.04 and 5.49±0.04, sequentially. The findings of this study demonstrated the route for isolation of light-coloured OSW hemicelluloses that have potential for conversion into industrially important value-added products such as biodegradable plastics for food packaging applications and xylooligosaccharides.

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Biorefinery based on olive biomass. State of the art and future trends

Cited by 202 publications

References 72 publications

Design and Optimization of Sulfuric Acid Pretreatment of Extracted Olive Tree Biomass Using Response Surface Methodology

Design and Optimization of Sulfuric Acid Pretreatment of Extracted Olive Tree Biomass Using Response Surface Methodology

Valorization of winery and oil mill wastes by microbial technologies

Valorization of Olive-Oil Industry Solid Waste: Statistical Optimization of Alkaline Extraction Conditions for Light-Coloured Hemicelluloses

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