Potato peel as feedstock for bioethanol production: A comparison of acidic and enzymatic hydrolysis

Khawla, Ben Jeddou; Maktouf, Sameh; Ghazala, Imen; Donyes, Frikha; Ghribi, Dhouha; Raoudha, Ellouz Ghorbel; Nouri-Ellouz, Oumèma

doi:10.1016/j.indcrop.2013.10.025

Cited by 123 publications

(75 citation statements)

References 18 publications

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“…Values are expressed on a DM base and are relative to two batches, one collected in 2012, and the other in 2013. The data presented here are in good agreement with those available in the literature on potato-peel residues 6,7 . On a fresh mass basis (100 g), potato residues before drying consisted of 86.7 ± 0.3 g water, 6.1 ± 0.5 g starch, 1.3 ± 0.0 g proteins, and 0.7 ± 0.2 g LA.…”

Section: Resultssupporting

confidence: 90%

“…The typical water content of potato peel residues is 77-85 % w/w 5,6 and the composition on a dry mass (DM) basis is as follows: 47-52 % w/w starch, 8-16 % w/w protein, ca. 7 % w/w ash, up to 1 % w/w soluble sugars, 0.5-2.6 % w/w fat, while the rest is fibers 6,7 . An overview on current practices and potential applications of potato residues is available in the literature 5,8 .…”

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confidence: 99%

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Valorization of Potato-processing Residues for the Production of Lactic Acid

Smerilli¹

2016

Chem.Biochem.Eng.Q.

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Every year large amounts of residues accumulate from potato processing. The aim of this study is to develop a process to valorize these residues as feedstock for lactic acid fermentation in a way that is suitable for industrial production. An enzymatic hydrolysate obtained from potato residues (46 % w/w dry mass starch) was used as a substrate in batch and fed-batch fermentations with Lactobacillus casei. Supplementation of yeast extract (3 g L ) was required to improve productivities. Despite the inhibitory effect exerted by phenolic compounds in the medium, reasonably high lactic acid concentrations (102 g L -1 ) and yields (92 %) were obtained, with 92 % (L-isomer) optical purity. It was clearly demonstrated that potato residues are suitable as feedstock for large-scale production of technical grade lactic acid and that the developed process is promising for large-scale biorefinery applications.

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Section: Resultssupporting

confidence: 90%

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confidence: 99%

Valorization of Potato-processing Residues for the Production of Lactic Acid

Smerilli¹

2016

Chem.Biochem.Eng.Q.

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“…To use this waste as only livestock feed leads to the loss of raw material with considerable economic potential (Wu 2016). The main components of PPW are usually water, starch, cellulose, hemicellulose, fermentable sugars, lignin, proteins, polyphenols, and alkaloids (Izmirlioglu and Demirci 2012;Khawla et al 2014;Chintagunta et al 2016;Guechi and Hamdaoui 2016). Thus, this residue can potentially be utilized as feedstock for biorefineries and for the production of value-added products.…”

Section: Introductionmentioning

confidence: 99%

Acid Liquefaction of Potato (Solanum tuberosum) and Sweet Potato (Ipomoea batatas) Cultivars Peels – Pre-Screening of Antioxidant Activity/Total Phenolic and Sugar Contents

Mateus

Ventura²,

Rego

et al. 2017

BioResources

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In the present study, the liquefaction of both regular and sweet potato peels was conducted to investigate the bio-oil produced, the sugar and total phenolic content, and antioxidant activity. Initially, the bio-oil obtained after liquefaction was partitioned into two different fractions, a hydrophilic fraction and the other consisted of the portion that contained the apolar compounds. Afterward, the samples of the whole bio-oil, aqueous extract, and organic phase of both cultivars were analyzed by attenuated total reflection-Fourier Transform infrared (ATR-FTIR) spectroscopy, hydroxyl number, and acid value. This was done in combination with assessment of the sugar and total phenolic contents and antioxidant activity. The samples demonstrated a considerable content of phenolic moieties in their composition. The antioxidant activity, which was assessed by the 2,2-diphenyl-1-picrylhydrazyl radical method, revealed that the antioxidants of the liquefied products and its extracts were generally better than that of butylated hydroxytoluene. Glucose, sucrose, and maltose were identified and quantified within all of the samples.

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“…Besides, in order to utilize waste resources, Subhedar & Gogate (2015) reported the production of ethanol from waste newspaper. Ethanol was produced using potato peel as feedstock [12].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Some Pretreatment Methods on Cellulose Recovery from Water Hyacinth (Eichhornia Crassipe)

Thi¹,

Thanh²,

Lan³

et al. 2017

JOCET

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Abstract-The effects of three physical pretreatment methods (water bath, ultrasound and microwave) on the cellulose recovery of water hyacinth were investigated in this study. Before treatment, cellulose and hemicellulose content of dried water hyacinth sample was 36.04%. After treating by ultrasound (70 o C for 1 h) at a ratio of deionized water (DIW) (mL) to dried sample (g) of 10:1, cellulose and hemicellulose content in the treated sample was 57.70.65 %. The highest yield of cellulose and hemicellulose (58.190.59%) obtained by water bath treament at 100 o C for 1 h whereas the cellulose and hemicellulose yield was 60.420.07% attained by microwave pretreatment (350W, 10 min at a ratio of DIW (mL) to dried sample (g) of 10:1). Therefore, among three pretreatment methods, microwave assisted DIW pretreatment presented the best efficiency on cellulose recovery. The outcome showed that microwave assisted DIW pretreated water hyacinth is a promising raw material for bioethanol production. The effects of these treatments on the composition and structure of water hyacinth were studied by thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM).Index Terms-Water hyacinth, Eichhornia crassipes, cellulose recovery, ultrasound, microwave and water bath.

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Potato peel as feedstock for bioethanol production: A comparison of acidic and enzymatic hydrolysis

Cited by 123 publications

References 18 publications

Valorization of Potato-processing Residues for the Production of Lactic Acid

Valorization of Potato-processing Residues for the Production of Lactic Acid

Acid Liquefaction of Potato (Solanum tuberosum) and Sweet Potato (Ipomoea batatas) Cultivars Peels – Pre-Screening of Antioxidant Activity/Total Phenolic and Sugar Contents

Comparison of Some Pretreatment Methods on Cellulose Recovery from Water Hyacinth (Eichhornia Crassipe)

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