Merck
  • Home
  • Search Results
  • Comparison of different process strategies for bioethanol production from Eucheuma cottonii: An economic study.

Comparison of different process strategies for bioethanol production from Eucheuma cottonii: An economic study.

Bioresource technology (2015-08-19)
Inn Shi Tan, Keat Teong Lee
ABSTRACT

The aim of this work was to evaluate the efficacy of red macroalgae Eucheuma cottonii (EC) as feedstock for third-generation bioethanol production. Dowex (TM) Dr-G8 was explored as a potential solid catalyst to hydrolyzed carbohydrates from EC or macroalgae extract (ME) and pretreatment of macroalgae cellulosic residue (MCR), to fermentable sugars prior to fermentation process. The highest total sugars were produced at 98.7 g/L when 16% of the ME was treated under the optimum conditions of solid acid hydrolysis (8% (w/v) Dowex (TM) Dr-G8, 120°C, 1h) and 2% pretreated MCR (P-MCR) treated by enzymatic hydrolysis (pH 4.8, 50°C, 30 h). A two-stream process resulted in 11.6g/L of bioethanol from the fermentation of ME hydrolysates and 11.7 g/L from prehydrolysis and simultaneous saccharification and fermentation of P-MCR. The fixed price of bioethanol obtained from the EC is competitive with that obtained from other feedstocks.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Ethanol, purum, secunda spirit, denaturated with 2% 2-butanone and 0.5% 4-methyl-2-pentanone, S15, ~96% (based on denaturant-free substance)
Sigma-Aldrich
Potassium phosphate monobasic, BioUltra, for molecular biology, anhydrous, ≥99.5% (T)
Sigma-Aldrich
Dextrose, meets EP, BP, JP, USP testing specifications, anhydrous
Sigma-Aldrich
Potassium phosphate monobasic, ReagentPlus®
Sigma-Aldrich
Potassium phosphate monobasic, ACS reagent, ≥99.0%
Sigma-Aldrich
Ethanol, purum, absolute ethanol, denaturated with 4.8% isopropanol, A15 IPA1, ≥99.8% (based on denaturant-free substance)
Sigma-Aldrich
Ethanol, ACS reagent, prima fine spirit, without additive, F15 o1
Sigma-Aldrich
Ethanol, purum, fine spirit, denaturated with 2% 2-butanone, F25 MEK1, ~96% (based on denaturant-free substance)
Sigma-Aldrich
Potassium phosphate monobasic, buffer substance, anhydrous, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99.5-100.5%
Sigma-Aldrich
Ethanol, purum, fine spirit, denaturated with 4.8% methanol, F25 METHYL1, ~96% (based on denaturant-free substance)
Sigma-Aldrich
Ethanol, purum, absolute ethanol, denaturated with 1% cyclohexane, A15 CYCLO1, ≥99.8% (based on denaturant-free substance)
Sigma-Aldrich
Ethanol, purum, absolute ethanol, denaturated with 2% 2-butanone, A15 MEK1, ≥99.8% (based on denaturant-free substance)
Sigma-Aldrich
Potassium phosphate monobasic, meets analytical specification of Ph. Eur., NF, E340, anhydrous, 98-100.5% (calc. to the dried substance)
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, HPLC/spectrophotometric grade
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, ACS reagent, ≥99.5%
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, meets USP testing specifications
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, for molecular biology
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, for molecular biology
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, ACS reagent, meets USP testing specifications, Excise Tax-free, Permit for use required
Sigma-Aldrich
Ethyl alcohol, Pure, 160 proof, Excise Tax-free, Permit for use required
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, anhydrous, ≥99.5%
Sigma-Aldrich
Potassium phosphate monobasic, 99.99% trace metals basis
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, ACS spectrophotometric grade, 95.0%
Sigma-Aldrich
Potassium phosphate monobasic, for molecular biology, ≥98.0%
Sigma-Aldrich
Potassium phosphate monobasic, powder, suitable for cell culture, suitable for insect cell culture, suitable for plant cell culture, ≥99.0%
Sigma-Aldrich
Calcium hydroxide, 99.995% trace metals basis
Sigma-Aldrich
5-Hydroxymethyl-2-furaldehyde, 99%
Sigma-Aldrich
Sulfuric acid, 99.999%
Sigma-Aldrich
D-(+)-Galactose, meets analytical specification of Ph. Eur., BP
Supelco
Ethanol solution, certified reference material, 2000 μg/mL in methanol