Response surface methodology for the optimization of cellulosic ethanol production from Phragmites australis through pre-saccharification and simultaneous saccharification and fermentation

Cavalaglio, Gianluca; Gelosia, Mattia; Ingles, David; Pompili, Enrico; D’Antonio, Silvia; Cotana, Franco

doi:10.1016/j.indcrop.2015.12.089

Cited by 34 publications

(30 citation statements)

References 26 publications

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“…As shown in Table 2, the cellulose content of RM was about 31%, a little lower than other lignocellulosic biomasses (e.g., cardoon or Phragmites australis) [16,19]. This lower value of cellulose could be related to a partial decomposition of organic matter that occurs when biomass is exposed for a long time to weathering and the action of natural micro-organisms.…”

Section: Resultsmentioning

confidence: 91%

“…The Steam explosion (SE) process is an eco-friendly pretreatment [13] that uses hot steam for deconstructing the lignocellulosic biomass entirety [14,15]. The SE pretreatment allows the recovery of a large fraction of sugars derived from hemicellulose (both monomeric and oligomeric) into an aqueous solution and a lignocellulosic pulp where cellulose is more easily subjected to enzymatic attack [16,17]. Three different process configurations can be employed for the production of bioethanol from pretreated biomass, such as separate hydrolysis and fermentation (SHF), simultaneous saccharification and fermentation (SSF) and semi-simultaneous saccharification and fermentation (SSSF).…”

Section: Introductionmentioning

confidence: 99%

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Lignocellulosic Ethanol Production from the Recovery of Stranded Driftwood Residues

et al. 2016

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This paper builds upon a research project funded by the Italian Ministry of Environment, and aims to recover stranded driftwood residues (SDRs), in order to transform a potential pollution and safety issue into valuable bio-resources. In particular, one of the experiments consisted of bioethanol production from lignocellulosic residues. The SDRs were gathered from the Italian coast (Abruzzo Region, Italy) after an intense storm. The biomass recalcitrance, due to its lignocellulosic structure, was reduced by a steam explosion (SE) pretreatment process. Four different pretreatment severity factors (R 0 ) were tested (LogR 0 3.65, 4.05, 4.24 and 4.64) in order to evaluate the pretreated material's accessibility to enzymatic attack and the holocellulose (cellulose plus hemicellulose) recovery. A first enzymatic hydrolysis was performed on the pretreated materials by employing a solid/liquid (S/L) ratio of 1% (w/w) and an enzyme dosage of 30% (w enzyme/w cellulose), in order to estimate the maximum enzymatically accessible cellulose content. Since the primary goal of pretreatment and hydrolysis is to convert as much cellulose as possible into monomeric glucose and recover all the holocellulose, the two pretreated materials showing these features were selected for bioethanol production process. The pretreated materials underwent a semi-simultaneous saccharification and fermentation (SSSF). The SSSF process was performed into two lab-scale bioreactors (5 L) with an S/L ratio of 15% and an enzyme dosage of 15% for five days. The efficiency of the whole bioethanol production process was assessed as ethanol overall yields (g ethanol/100 g raw material). The best overall yield was achieved by sample BS04 (8.98 g ethanol/100 g raw material).

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Section: Resultsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Lignocellulosic Ethanol Production from the Recovery of Stranded Driftwood Residues

et al. 2016

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“…Ever-increasing world energy-demand, depleting fossil fuel reserves, and growing environmental concerns motivated a tremendous research impetus on development of renewable energy sources [1,2]. Lignocellulosic biomass (LB) represented mainly by agricultural/forestry residues are the most plenteous feed stock that can be exploited for production of energy and high value specialty chemicals [3].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, valorization of agroindustrial residues may have economic, environmental, and strategic significance especially for countries like India where agriculture is the major basis of economy [1,5]. Exploitation of agroindustrial wastes as substrates for enzyme production may help reducing production cost.…”

Section: Introductionmentioning

confidence: 99%

“…The cellulosic and hemicellulosic contents of rice straw can be enzymatically hydrolyzed only after appropriate pretreatments [2,9]. However, unavailability of suitable pretreatment regime and/or ace saccharifying enzymes pose big challenge for bioconversion of rice straw polysaccharides into simple sugars for microbial fermentation [1,9,17].…”

Section: Introductionmentioning

confidence: 99%

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Xylanase production from a new strain of Aspergillus terreus S9 and its application for saccharification of rice straw using combinatorial approach

Sharma

Bajaj

2017

Env Prog and Sustain Energy

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High production cost and lack of process‐suitable characteristics in available microbial xylanases limit their vast industrial application potential. A new strain of Aspergillus terreus S9 isolated from mushroom compost (Directorate of Mushroom Research, Solan, India), utilized agro‐industrial wastes as substrates for growth, and produced a process‐apt xylanase. The study is the first ever report of a thermostable (60–90°C) and broad range pH stable (6.0–10.0) xylanase from a strain of Aspergillus terreus. Of a total of ten process variables examined based on Plackett‐Burman design, four variables, i.e., wheat bran, incubation time, pH, and CaCl2 were earmarked to have substantial influence on xylanase production. These selected four variables were further optimized using Design of Experiments (DoE) approach (response surface methodology), and xylanase yield was enhanced (1.92‐fold). Saccharification potential of xylanase was assessed using rice straw as substrate, under several sets of combinatorial regimes. Results showed that alkali pretreatment (0.2M KOH) followed by acid pretreatment (1% sulphuric acid) and enzymatic hydrolysis with cellulase and xylanase yielded maximum sugars. Desired industrial traits of A. terreus S9 xylanase reflect its application prospective for valorization of lignocellulosic biomass for production of biofuel‐ethanol/other industrial products. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 1210–1219, 2018

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An innovative way for the delignification of Phragmites australis residues by steam explosion and γ‐valerolactone microwave assisted extraction

Cavalaglio

Cotana

Gelosia

et al. 2017

Env Prog and Sustain Energy

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This work aimed at optimizing the conditions for lignin removal in Phragmites australis processing residues from the manufacturing of local handicrafts. The delignification consisted of a double step treatment. The first step was represented by steam explosion (SE) pretreatment for the deconstruction of the lignocellulosic matrix and solubilization of the hemicelluloses to enhance the subsequent lignin extraction. The second step consisted in the organosolv extraction of lignin from the steam‐pretreated P. australis by microwave assisted extraction (MAE) using green solvent γ‐valerolactone. The optimization was carried out using design of experiments and response surface methodology generating a central composite design. The investigated factors were the severity factor (log R0) for the SE pretreatment and time and temperature for the MAE treatment. The processes led to a cellulose‐rich pulp with a delignification of 75%. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 736–741, 2017

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Response surface methodology for the optimization of cellulosic ethanol production from Phragmites australis through pre-saccharification and simultaneous saccharification and fermentation

Cited by 34 publications

References 26 publications

Lignocellulosic Ethanol Production from the Recovery of Stranded Driftwood Residues

Lignocellulosic Ethanol Production from the Recovery of Stranded Driftwood Residues

Xylanase production from a new strain of Aspergillus terreus S9 and its application for saccharification of rice straw using combinatorial approach

An innovative way for the delignification of Phragmites australis residues by steam explosion and γ‐valerolactone microwave assisted extraction

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