Fed batch enzymatic saccharification of food waste improves the sugar concentration in the hydrolysates and eventually the ethanol fermentation by Saccharomyces cerevisiae H058

Yan, Shiguang; Yao, Jianming; Yao, Liming; Zhi, Zhijun; Chen, Xiang-Song; Wu, Jiawei

doi:10.1590/s1516-89132012000200002

Cited by 37 publications

(20 citation statements)

References 15 publications

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“…Generally, ethanol production utilizes the separate hydrolysis and fermentation (SHF) process, which includes a series of steps such as liquefaction, saccharification and fermentation [8][9][10]. A challenging perspective of our previous study was to apply a one-step process called the "consolidated continuous solid-state fermentation (CC-SSF)" system which was composed of a rotating drum reactor, a humidifier and a condenser.…”

Section: Introductionmentioning

confidence: 99%

Feasibility Study of Ethanol Production from Food Wastes by Consolidated Continuous Solid-State Fermentation

Moukamnerd¹,

Kawahara²,

Katakura³

2013

JSBS

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To save the cost and input energy for bioethanol production, a consolidated continuous solid-state fermentation (CCSSF) system composed of a rotating drum reactor, a humidifier and a condenser has been developed. In this research, the feasibility of using this system for production of ethanol from food wastes was carried out. The ethanol conversion of bread crust and rice grain (uncooked rice) as substrates reached up to 100.9% ± 5.1% and 108.0% ± 7.9% (against theoretical yield), respectively. Even for bread crust, a processed starchy material which contained lower carbohydrate content than rice grain, the amount of ethanol obtained in a unit of CCSSF per year was higher due to easy saccharification and fermentation. The salt contained in potato chips directly affected yeast activity resulting to low ethanol conversion (80.7% ± 4.7% against theoretical yield).

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Section: Introductionmentioning

confidence: 99%

Feasibility Study of Ethanol Production from Food Wastes by Consolidated Continuous Solid-State Fermentation

Moukamnerd¹,

Kawahara²,

Katakura³

2013

JSBS

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“…Recovery of nutrients from food waste in the form of carbon, nitrogen and phosphorous compounds can be performed by chemical and biological/enzymatic methods after solubilisation of the waste matter [21][22][23][24][25].…”

Section: Recovery Of Nutrients From Food and Organic Wastesmentioning

confidence: 99%

“…Kim et al used an enzyme mixture consisting of carbohydrase, glucoamylase, cellulase and protease to hydrolyse food waste and obtained 0.63 g glucose g -1 total solids applied [21]. Yan et al used fungal α-amylase and glucoamylase for hydrolysis of food waste and reached an almost complete digestion of starch in a fed-batch process [22]. Claassen et al used a different approach and treated domestic organic waste first by Masonite steam explosion at 200°C for 6 minutes to increase the solubility of waste matters, followed by a treatment of the liquid and remaining solids with commercial cellulolytic enzymes [23].…”

Section: Recovery Of Nutrients From Food and Organic Wastesmentioning

confidence: 99%

Valorisation of food waste in biotechnological processes

Pleißner

Lin

2013

sustain chem process

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Around 1.3 billion tonnes of food are wasted worldwide per year, which is originally produced under extensive use of energy and nutrients. Use of food waste as feedstock in biotechnological processes provides an innovative way to recover parts of the energy and nutrients initially spent on food production. By chemical and biological methods, food waste is hydrolysed to glucose, free amino nitrogen and phosphate, which are utilisable as nutrients by many microorganisms whose metabolic versatility enables the production of a wide range of products. Microalgae are particularly of interest as chemicals, materials and energy are obtainable from microalgal biomass after chemical and/or biological modifications. In this review, valorisation of food waste in biotechnological processes is presented as an additional option to green chemical technologies.

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“…Enzymatic hydrolysis using high initial biomass with a low enzyme concentration is the most efficient approach to produce high reducing sugar concentrations at low production cost. High initial biomass is required to obtain a high reducing sugar concentration and subsequently for production of highly concentrated fermentation products, which may substantially reduce the distillation cost during recovery [10]. However, using a high concentration of initial biomass concentration has been found to increase the viscosity of the hydrolysis system, which leads to low hydrolysis efficiency and increases energy consumption through a string process.…”

Section: Introductionmentioning

confidence: 99%

“…To date, several strategies have been proposed to overcome the problems with the hydrolysis of various lignocellulosic biomasses, such as a bench-scale helical bioreactor, a horizontal five chamber liquefaction reactor, a roller bottle reactor, prehydrolysis and fed-bach operation of simultaneous saccharification and fermentation (SSF) [10,11]. Fed-batch enzymatic hydrolysis was found to be among the most promising approaches to enhance enzymatic hydrolysis performance by adding the substrate or enzyme gradually to maintain biomass viscosity and enhance reducing sugar production [12].…”

Section: Introductionmentioning

confidence: 99%

Alkaline-assisted Microwave Pretreatment of Tetraselmis suecica Biomass for Fed-batch Enzymatic Hydrolysis

Kassim

Meng

Serri

2019

J. Eng. Technol. Sci.

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A two-part study on pretreatment and fed-batch enzymatic hydrolysis of pretreated Tetraselmis suecica using a high initial biomass concentration was conducted. First, the effect of different pretreatment processes, i.e. microwave (MC), dilute alkaline (AK), and microwave-alkaline assisted (MAK) pretreatment, on enzymatic hydrolysis of T. suecica biomass was evaluated. Furthermore, high initial biomass concentration enzymatic hydrolysis improvement via a fed-batch strategy was performed. Among the pretreatments tested, the MAK pretreatment produced the highest sugar concentration at 9.83 ± 0.24 mg/mL, corresponding to a conversion yield of up to 85.58% of carbohydrate content available in the pretreated biomass. The solid fraction generated after pretreatment was characterized using Fourier transform infrared (FTIR) spectroscopy. The FTIR analysis revealed a significant change in the functional hydroxyl and acetyl groups of the biomass, which is favorable for enzymatic hydrolysis. Introducing an initial microalgal biomass concentration beyond 15% (w/v) exhibited a low enzymatic hydrolysis yield. The fed-batch enzymatic hydrolysis strategy of the MAK pretreated T. suecica was further investigated by adding the substrate at different time intervals. The findings indicate that the fed-batch operation system could enhance sugar production and enzymatic hydrolysis yield one-fold.

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Fed batch enzymatic saccharification of food waste improves the sugar concentration in the hydrolysates and eventually the ethanol fermentation by Saccharomyces cerevisiae H058

Abstract: ABSTRACT

Cited by 37 publications

References 15 publications

Feasibility Study of Ethanol Production from Food Wastes by Consolidated Continuous Solid-State Fermentation

Feasibility Study of Ethanol Production from Food Wastes by Consolidated Continuous Solid-State Fermentation

Valorisation of food waste in biotechnological processes

Alkaline-assisted Microwave Pretreatment of Tetraselmis suecica Biomass for Fed-batch Enzymatic Hydrolysis

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