Ethanol production from palm pressed fiber by prehydrolysis prior to simultaneous saccharification and fermentation (SSF)

Boonsawang, Piyarat; Subkaree, Yuttasak; Srinorakutara, Teerapatr

doi:10.1016/j.biombioe.2012.02.009

Cited by 36 publications

(13 citation statements)

References 20 publications

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“…Mild alkali pretreatment of biomass favours enzymatic hydrolysis especially for materials that have relatively low lignin content. Sugar degradation and corrosion problems are less severe in alkali processes than in acid pretreatment [57,102] and mild conditions (55 ∘ C) may not require posttreatment washing since enzyme inhibiting compounds are generally low [103].…”

Section: Process Backgroundmentioning

confidence: 99%

Chemical Pretreatment Methods for the Production of Cellulosic Ethanol: Technologies and Innovations

Bensah

Mensah

2013

International Journal of Chemical Engineering

277

105

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Pretreatment of lignocellulose has received considerable research globally due to its influence on the technical, economic and environmental sustainability of cellulosic ethanol production. Some of the most promising pretreatment methods require the application of chemicals such as acids, alkali, salts, oxidants, and solvents. Thus, advances in research have enabled the development and integration of chemical-based pretreatment into proprietary ethanol production technologies in several pilot and demonstration plants globally, with potential to scale-up to commercial levels. This paper reviews known and emerging chemical pretreatment methods, highlighting recent findings and process innovations developed to offset inherent challenges via a range of interventions, notably, the combination of chemical pretreatment with other methods to improve carbohydrate preservation, reduce formation of degradation products, achieve high sugar yields at mild reaction conditions, reduce solvent loads and enzyme dose, reduce waste generation, and improve recovery of biomass components in pure forms. The use of chemicals such as ionic liquids, NMMO, and sulphite are promising once challenges in solvent recovery are overcome. For developing countries, alkalibased methods are relatively easy to deploy in decentralized, low-tech systems owing to advantages such as the requirement of simple reactors and the ease of operation.

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Section: Process Backgroundmentioning

confidence: 99%

Chemical Pretreatment Methods for the Production of Cellulosic Ethanol: Technologies and Innovations

Bensah

Mensah

2013

International Journal of Chemical Engineering

277

105

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“…Alkaline pretreatment was employed to delignify the EFBs. Sodium hydroxide at 10 % (w/v) was used to pretreat EFBs at a ratio of 10:1 [16]. The mixture was treated at a temperature of 100°C for 30 min.…”

Section: Methodsmentioning

confidence: 99%

Lipid Production from Hemicellulose and Holocellulose Hydrolysate of Palm Empty Fruit Bunches by Newly Isolated Oleaginous Yeasts

Tampitak

Louhasakul

Cheirsilp

et al. 2015

Appl Biochem Biotechnol

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Palm empty fruit bunches (EFBs) are abundant lignocellulosic wastes from palm oil mills. They are potential sources of sugars which can be converted to microbial lipids by oleaginous yeasts. To produce sugars from EFB, two-step and one-step hydrolysis reactions were performed. In the first step, the use of diluted sulfuric acid (0.5 % w/v) hydrolyzed hemicelluloses and released mainly pentoses, and in the second step of hydrolysis of residual pulp using 2.5 % (w/v), sulfuric acid released more hexoses. The use of 2.5 % (w/v) sulfuric acid in one-step hydrolysis of holocelluloses released the highest amount of sugars (38.3 g/L), but it also produced high concentration of potential inhibitors (>1 g/L). Three oleaginous yeasts, Rhodotorula mucilaginosa, Kluyveromyces marxianus, and Candida tropicalis, were isolated and screened for their ability to convert EFB hydrolysates into lipids. These yeasts grew well and produced lipids from EFB hemicellulose and holocellulose hydrolysate after potential inhibitors were removed. This study shows that EFB can be used for lipid production.

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“…The complete removal of hemicellulose usually results in a maximum enzymatic digestibility [24], while the increase of the porosity of the sample can cause an increase in the lignin content of the sample. Studies of dilute acid pretreatment show the increase in the lignin content would not affect the ethanol yield and concentration [25][26][27].…”

Section: Fermentation Of Mxg Cake For Ethanol Productionmentioning

confidence: 99%

Green Biorefinery of Giant Miscanthus for Growing Microalgae and Biofuel Production

et al. 2017

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Abstract:In this study, an innovative green biorefinery system was successfully developed to process the green biomass into multiple biofuels and bioproducts. In particular, fresh giant miscanthus was separated into a solid stream (press cake) and a liquid stream (press juice) using a screw press. The juice was used to cultivate microalga Chlorella vulgaris, which was further thermochemically converted via thermogravimetry analysis (TGA) and pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) analysis, resulting in an approximately 80% conversion. In addition, the solid cake of miscanthus was pretreated with dilute sulfuric acid and used as the feedstock for bioethanol production. The results showed that the miscanthus juice could be a highly nutritious source for microalgae that are a promising feedstock for biofuels. The highest cell density was observed in the 15% juice medium. Sugars released from the miscanthus cake were efficiently fermented to ethanol using Saccharomyces cerevisiae through a simultaneous saccharification and fermentation (SSF) process, with 88.4% of the theoretical yield.

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Ethanol production from palm pressed fiber by prehydrolysis prior to simultaneous saccharification and fermentation (SSF)

Cited by 36 publications

References 20 publications

Chemical Pretreatment Methods for the Production of Cellulosic Ethanol: Technologies and Innovations

Chemical Pretreatment Methods for the Production of Cellulosic Ethanol: Technologies and Innovations

Lipid Production from Hemicellulose and Holocellulose Hydrolysate of Palm Empty Fruit Bunches by Newly Isolated Oleaginous Yeasts

Green Biorefinery of Giant Miscanthus for Growing Microalgae and Biofuel Production

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