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Membrane bioreactors' potential for ethanol and biogas production: a review.

Environmental technology (2013-12-20)
Päivi Ylitervo, Julius Akinbomia, Mohammad J Taherzadeha
ABSTRACT

Companies developing and producing membranes for different separation purposes, as well as the market for these, have markedly increased in numbers over the last decade. Membrane and separation technology might well contribute to making fuel ethanol and biogas production from lignocellulosic materials more economically viable and productive. Combining biological processes with membrane separation techniques in a membrane bioreactor (MBR) increases cell concentrations extensively in the bioreactor. Such a combination furthermore reduces product inhibition during the biological process, increases product concentration and productivity, and simplifies the separation of product and/or cells. Various MBRs have been studied over the years, where the membrane is either submerged inside the liquid to be filtered, or placed in an external loop outside the bioreactor. All configurations have advantages and drawbacks, as reviewed in this paper. The current review presents an account of the membrane separation technologies, and the research performed on MBRs, focusing on ethanol and biogas production. The advantages and potentials of the technology are elucidated.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, anhydrous, ≥99.5%
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, for molecular biology
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, meets USP testing specifications
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, ACS spectrophotometric grade, 95.0%
Sigma-Aldrich
Reagent Alcohol, anhydrous, ≤0.003% water
Sigma-Aldrich
Reagent Alcohol, anhydrous, ≤0.005% water
Sigma-Aldrich
Ethanol, anhydrous, denatured
Sigma-Aldrich
Reagent Alcohol, reagent grade
Sigma-Aldrich
Ethyl alcohol, denatured, reagent grade
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, ACS reagent, ≥99.5%
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, HPLC/spectrophotometric grade
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, meets USP testing specifications
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, for molecular biology
Sigma-Aldrich
Ethanol, puriss. p.a., ACS reagent, prima fine spirit, without additive, F15 o1, ~96%
Supelco
Dehydrated Alcohol, Pharmaceutical Secondary Standard; Certified Reference Material
Sigma-Aldrich
Ethanol Fixative 80% v/v, suitable for fixing solution (blood films)
Sigma-Aldrich
Reagent Alcohol, suitable for HPLC
Supelco
Ethanol solution, certified reference material, 2000 μg/mL in methanol
Supelco
Ethanol-100 (10 ampules/kit), 100 mg/dL in H2O, ampule of 10 × 1.2 mL, certified reference material, Cerilliant®
Supelco
Ethanol-10, 10 mg/dL in H2O, pack of 10 × 1.2 mL ampules, certified reference material, Cerilliant®
Supelco
Ethanol-500, 500 mg/dL in H2O, ampule of 10 × 1.2 mL, certified reference material, Cerilliant®
Supelco
Ethanol-80, 80 mg/dL in H2O, ampule of 10 × 1.2 mL, certified reference material, Cerilliant®
Supelco
Ethanol-50, 50 mg/dL in H2O, ampule of 10 × 1.2 mL, certified reference material, Cerilliant®
USP
Dehydrated Alcohol, United States Pharmacopeia (USP) Reference Standard
Supelco
Ethanol-40, 40 mg/dL in H2O, ampule of 10 × 1.2 mL, certified reference material, Cerilliant®
Supelco
Ethanol-25, 25 mg/dL in H2O, ampule of 10 × 1.2 mL, certified reference material, Cerilliant®
Supelco
Ethanol-300, 300 mg/dL in H2O, ampule of 10 × 1.2 mL, certified reference material, Cerilliant®
Supelco
Ethanol Calibration Kit, ampule of 10 × 1.2 mL, certified reference material, Cerilliant®
Supelco
Ethanol-200 (10 ampules/kit), 200 mg/dL in H2O, ampule of 10 × 1.2 mL, certified reference material, Cerilliant®
Supelco
Ethanol-400 (10 ampules/kit), 400 mg/dL in H2O, ampule of 10 × 1.2 mL, certified reference material, Cerilliant®