Simultaneous separation and biocatalytic conversion of formaldehyde to methanol in enzymatic membrane reactor

Ismail, Fauziah; Marpani, Fauziah; Othman, Nur Hidayati; Him, Nik Raikhan Nik

doi:10.1080/00986445.2019.1705795

Cited by 10 publications

(3 citation statements)

References 29 publications

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“…This finding was also supported by Tang and Chen (2002). Further analysis of the fouling mechanism using the Hermia model (e.g., Ismail et al, 2019) could not be performed in this case due to very small pore size of the NF membrane.…”

Section: The Effect Of Process Parameters On Permeate Behaviorsupporting

confidence: 60%

Treatment of Batik Industry Wastewater Plant Effluent using Nanofiltration

Istirokhatun

Susanto

Budihardjo

et al. 2021

IJTech

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In this study, the removal of dyes, sulfide, and some other components in batik wastewater using a nanofiltration (NF) membrane was investigated. Remazol red (RR dye), indigosol brown (IB dye), and sodium sulfide (Na2S) were used as models of synthetic batik wastewater. Furthermore, NF performance for treating real batik wastewater was also examined. The effects of operating conditions on flux and rejection were investigated. The results showed that all filtration had similar permeate flux behavior, where rapid flux decline was observed at the initial filtration, followed by gradual flux decrease and then reaching a stable flux. The rejections of the pollutant model during NF of synthetic wastewater were 61-76%, 90-95%, and 90-99% for sulfide, IB, and RR, respectively. The color rejection in real batik wastewater was 99.84%. Further, the removal of chemical oxygen demand (COD) reached 87.6%.

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Section: The Effect Of Process Parameters On Permeate Behaviorsupporting

confidence: 60%

Treatment of Batik Industry Wastewater Plant Effluent using Nanofiltration

Istirokhatun

Susanto

Budihardjo

et al. 2021

IJTech

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“…Luo and co-workers introduced a membrane reactor setup which immobilized the three dehydrogenase enzymes, simultaneously or separately, in flat-sheet polymeric membranes (Figure 5) by simple pressure-driven filtration (i.e., by directing membrane fouling formation), without any addition of organic solvent [17]. Using this technique, the immobilization procedure is simple and facile [44][45][46], enzyme denaturation is minimized during immobilization, maximum enzyme loading is obtained without enzyme leakage during operation [47], and the product could be removed immediately from the enzyme active site in order to decrease product inhibition. From this research, it was found that co-immobilization did not improve methanol production compared with sequential immobilization because of the trade-off between the mitigation of product inhibition and low substrate concentration for the adjacent enzymes.…”

Section: Types Of Enzymatic Reactor Systems Available For Biocatalytic Conversion Of Co 2 31 Enzyme Membrane Reactor (Emr) Systemmentioning

confidence: 99%

A Review on the Design and Performance of Enzyme-Aided Catalysis of Carbon Dioxide in Membrane, Electrochemical Cell and Photocatalytic Reactors

et al. 2021

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Multi-enzyme cascade catalysis involved three types of dehydrogenase enzymes, namely, formate dehydrogenase (FDH), formaldehyde dehydrogenase (FaldDH), alcohol dehydrogenase (ADH), and an equimolar electron donor, nicotinamide adenine dinucleotide (NADH), assisting the reaction is an interesting pathway to reduce thermodynamically stable molecules of CO2 from the atmosphere. The biocatalytic sequence is interesting because it operates under mild reaction conditions (low temperature and pressure) and all the enzymes are highly selective, which allows the reaction to produce three basic chemicals (formic acid, formaldehyde, and methanol) in just one pot. There are various challenges, however, in applying the enzymatic conversion of CO2, namely, to obtain high productivity, increase reusability of the enzymes and cofactors, and to design a simple, facile, and efficient reactor setup that will sustain the multi-enzymatic cascade catalysis. This review reports on enzyme-aided reactor systems that support the reduction of CO2 to methanol. Such systems include enzyme membrane reactors, electrochemical cells, and photocatalytic reactor systems. Existing reactor setups are described, product yields and biocatalytic productivities are evaluated, and effective enzyme immobilization methods are discussed.

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“…The functionalized polymeric and ceramic microfiltration/ultrafiltration (MF/UF) membranes have been widely used to immobilize enzymes, exhibiting high enzyme loading, and low permeation resistance [19][20][21][22]. However, MF/UF membranes cannot reject micropollutants leading to a high catalytic burden on enzymes [20], and the polymerized hydrophobic products and other unfavorable foulants tend to adsorb in the membrane pores, thus resulting in serious membrane fouling and enzyme inactivation [21].…”

Section: Introductionmentioning

confidence: 99%