Production of biofuels, limonene and pectin from citrus wastes

Pourbafrani, Mohammad; Forgács, Gergely; Horváth, Ilona Sárvári; Niklasson, Claes; Taherzadeh, Mohammad J.

doi:10.1016/j.biortech.2010.01.077

Cited by 275 publications

(161 citation statements)

References 16 publications

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“…Santi et al (2014) achieved an ethanol yield of 15 g/L by acid pretreatment of citrus waste with a novel scaled reactor of steam injection at 180 °C and 150 s, and fermentation with an industrial S. cerevisiae strain. Pourbafrani et al (2010) reported an ethanol yield of 0.037 g/L using diluted acid and enzymatic hydrolysis at 150 °C compared with 0.166 g/g reported in this study. Thus, it is important to highlight that the results obtained through the present study are promising because a value of ethanol yield among the above mentioned was obtained.…”

Section: Fermentationcontrasting

confidence: 44%

Thermal Hydrolysis of Orange Peel and its Fermentation with Alginate Beads to Produce Ethanol

Vázquez¹,

Roa-Morales²,

Natividad³

et al. 2017

BioResources

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Orange peel (OP) was subjected to thermal hydrolysis at temperature (T) and pressure (P) values lower than 180 °C and 1000 kPa, respectively, to minimize the energy consumption and obtain a good ethanol yield. The process was conducted in an autoclave, a pressurized reactor for studying the effect of T (120 to 180 °C), P (500 to 1000 kPa), gas type (N2 or CO2), and OP loading (2.5 x10 -2 and 5 x10 -2 gmL -1 ) on the reducing sugars yield. The results were compared with those from acid hydrolysis. Hydrolysates were fermented using immobilized yeast on alginate beads, and the highest ethanol yield of 33.14 g/L was obtained from OP treated at 120 °C. Under these conditions, a minimum of 1,407 kWh energy consumption was achieved.

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Section: Fermentationcontrasting

confidence: 44%

Thermal Hydrolysis of Orange Peel and its Fermentation with Alginate Beads to Produce Ethanol

Vázquez¹,

Roa-Morales²,

Natividad³

et al. 2017

BioResources

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“…No additional carbon source was needed to support the growth of the microorganism and PG production, which showed that the soluble sugar content of the OP was sufficient. Around 23-25 % of the dry weight of OP is the soluble (non-structural) carbohydrates composed mainly of glucose, fructose and sucrose [10,11,[36][37][38]. OP also contains insoluble cellulose, hemicellulose as well as pectin at appreciable amounts [10,38].…”

Section: Resultsmentioning

confidence: 99%

“…Around 23-25 % of the dry weight of OP is the soluble (non-structural) carbohydrates composed mainly of glucose, fructose and sucrose [10,11,[36][37][38]. OP also contains insoluble cellulose, hemicellulose as well as pectin at appreciable amounts [10,38]. These may have been hydrolyzed during the cultivation by the probable hydrolytic enzymes of A. sojae such as cellulases or hemicellulases, to yield additional simple sugars.…”

Section: Resultsmentioning

confidence: 99%

“…It can be utilized directly for the production of hydrolytic enzymes [3][4][5][6][7][8]. The insoluble polysaccharides of OP such as cellulose, hemicelluloses and pectin can be degraded to sugars by pretreatments and enzymatic hydrolysis, and used for the production of value-added products such as ethanol and various enzymes [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Utilization of orange peel, a food industrial waste, in the production of exo-polygalacturonase by pellet forming Aspergillus sojae

Büyükkileci

Lahore

Tarı

2014

Bioprocess Biosyst Eng

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The production of exo-polygalacturonase (exo-PG) from orange peel (OP), a food industrial waste, using Aspergillus sojae was studied in submerged culture. A simple, low-cost, industrially significant medium formulation, composed of only OP and (NH 4 ) 2 SO 4 (AS) was developed. At an inoculum size of 2.8 9 10 3 spores/mL, growth was in the form of pellets, which provided better mixing of the culture broth and higher exo-PG activity. These pellets were successfully used as an inoculum for bioreactors and 173.0 U/mL exo-PG was produced. Fed-batch cultivation further enhanced the exo-PG activity to 244.0 U/mL in 127.5 h. The final morphology in the form of pellets is significant to industrial fermentation easing the subsequent downstream processing. Furthermore, the low pH trend obtained during this fermentation serves an advantage to fungal fermentations prone to contamination problems. As a result, an economical exo-PG production process was defined utilizing a food industrial byproduct and producing high amount of enzyme.

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“…Citrus peel can be used in functional foods and even as a dietary supplement for human or animal feed [4] . Citrus peel is also used in biochemical engineering such as the production of biodegradable plastics by the copolymerization of limonene extracted from Citrus peel and carbon dioxide [5] , but also to produce bio fuels (ethanol) and biogas [6] . Pectin can be extracted from Citrus peel to use it in food industries through its thickening, texturizing, a gelling agent (making jams, jellies, fruit preparations, frozen creams and emulsified products [7] , but also in pharmaceutical industry as an ingredient for preparation of anti-diarrheal and detoxifying drugs [8,9] .…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Efficiency of Different Extraction Methods on Antioxidants of Maltease Orange Peel

Boudhrioua¹

2016

IJFNS

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The effect of conventional solvent extraction, CSE, ultrasound assisted extraction, UAE, microwave assisted extraction, MAE and supercritical CO 2 extraction, SC-CO 2 on the total phenols content, total flavonoids, individual flavonoids and antioxidant activity of orange peel were compared. Neohesperidin (from 0.624 ± 0.013 for SC-CO 2 extraction to 1.045 ± 0.001 g100 g orange peel powder for MAE) and hesperidin (from 0.407 ± 0.008 for SC-CO 2 extraction to 0.836 ± 0.029 g/100 g orange peel powder for UAE) are the major flavonoids (80% of total flavonoids by MAE and 87% by CSE) of orange peel whatever the used extraction method. The method giving the highest total phenol and flavonoid contents is microwave assisted extraction (2.363 ± 0.014 g GAE/100g orange peel powder), followed by ultrasound assisted extraction, conventional solvent extraction, and supercritical CO 2 extraction. However, antioxidant activity (DPPH method) cannot be correlated to TPC, TFC or individual flavonoids. Orange peel extracted by CSE (ethanol (80%), m/v: 5 g:50 ml, 30 min, 35°C, mechanical stirring at darkness, 3 successive extractions) presents the higher radical scavenging capacity compared to the other extracts obtained by MAE (Ethanol (80%), m/v: 5 g: 50 ml, 10s, 35°C, 170 W, 3 successive extractions) and UAE (ethanol (80%), m/v: 5g:50 ml, 30 min, 35°C, magnetic stirring at darkness, 3 successive extractions, 125W), SC-CO 2 extraction (ethanol (80%), m/v:5 g:50 ml, 30 min, 35°C, 22 MPa, 3 successive extractions). Besides, no additivity on the antioxidant activity is found with the DPPH method.

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Production of biofuels, limonene and pectin from citrus wastes

Cited by 275 publications

References 16 publications

Thermal Hydrolysis of Orange Peel and its Fermentation with Alginate Beads to Produce Ethanol

Thermal Hydrolysis of Orange Peel and its Fermentation with Alginate Beads to Produce Ethanol

Utilization of orange peel, a food industrial waste, in the production of exo-polygalacturonase by pellet forming Aspergillus sojae

Comparison of the Efficiency of Different Extraction Methods on Antioxidants of Maltease Orange Peel

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