The chemical cleaning of ceramic membrane used in UF

Tomaszewska, Maria; Białończyk, Lidia

doi:10.2478/v10026-012-0092-3

Cited by 6 publications

(2 citation statements)

References 13 publications

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“…Prior to further chemical cleaning, the normalized flux was measured with DW to determine chemically reversible fouling. [10] The CIP procedure was determined according to the literature [17,[21][22][23][24] and some preliminary trial-and-error tests with different chemical agents, concentrations and temperatures. After the CIP process, normalized flux with DW was observed again and any remaining membrane blockage was considered as chemically irreversible fouling.…”

Section: Flux Recoverymentioning

confidence: 99%

Effect of operating conditions on the performances of multichannel ceramic UF membranes for textile mercerization wastewater treatment

Avdičević

Košutić

Dobrović

2016

Environmental Technology

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Textile wastewaters are rated as one of the most polluting in all industrial sectors, and membrane separation is the most promising technology for their treatment and reuse of auxiliary chemicals. This study evaluates the performance of three types of tubular ceramic ultrafiltration membranes differing by mean pore size (1, 2 and 500 kDa) treating textile mercerization wastewater from a textile mill at different operating conditions: cross-flow velocity (CFV) and temperature. Acceptable results were obtained with 1 kDa ceramic membrane, with rejection efficiencies 92% for suspended solids, 98% for turbidity, 98% for color and 53% for total organic carbon at 20°C and 3 m s −1 CFV. Highest fouling effect was observed for 500 kDa membrane and lowest CFV. According to the observed results, 1 kDa membrane could be used for the treatment of wastewater from the textile mercerization process in terms of permeate quality. ARTICLE HISTORY

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Section: Flux Recoverymentioning

confidence: 99%

Effect of operating conditions on the performances of multichannel ceramic UF membranes for textile mercerization wastewater treatment

Avdičević

Košutić

Dobrović

2016

Environmental Technology

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“…In oily wastewater treatment, membranes are generally fouled due to the absorption of oil droplets on the membrane surface. The outcomes of this phenomena are reducing the flux at the permeate side, decreasing the membrane performance and shortening the membrane life [79][80][81][82]. Generally, oily wastewater treatment consists of two groups of membrane fouling which are reversible and irreversible fouling.…”

Section: Transport Fouling and Membrane Cleaningmentioning

confidence: 99%

Investigation of vacuum-assisted preparation methods of inorganic membranes

Jalil¹

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This research project systematically investigated the pore size tailoring of inorganic derived membranes by a novel vacuum-assisted preparation method. In particular, the effect of vacuum exposure time on the morphological features of the as-prepared membranes was investigated.Phenolic resin and titanium (IV) propoxide (TTP) precursors were chosen for the synthesis of carbon and titania membranes, respectively. The innovation in this study is that the preparation method is based on a combined dip-coating and vacuum-assisted method which has not been explored in literature. The pore size of the membranes was tailored by varying the vacuum times during preparation (0-1200s). The membranes were characterised by measuring the flux for a variety of organic substances, each having a different molecular weight cut-off.The first major contribution of this work is the effective preparation of carbon and titania membranes via the vacuum-assisted method. This has not been achieved before in the literature. no vacuum exposure. The membranes were also able to achieve rejections close to 100% for large MW PVP-360000 organics. However, no significant separation was observed for the lower MW glucose and sucrose. Separation values were measured for PVP-40000, and the carbon membranes delivered higher rejection than the titania membranes. The results suggest that the effect of vacuum time on pore size was stronger for the carbon membranes compared to the titania membranes.The second contribution of this thesis is related to the proposed mechanism of formation of the carbon membranes derived from the phenolic resins. It was found that the vacuum-assisted method imparted different morphologies and even influenced the chemistry of the carbon membranes.Specifically, resin crosslinking reactions were promoted as a function of the vacuum time. Further, pore volumes and surface areas increased from 0.81 cm 3 g -1 and 834 m 2 g -1 to 2.2 cm 3 g -1 and 1910 m 2 g -1 as the respective vacuum exposure time increased from 0 to 1200 s. This work postulates that a cluster to cluster aggregation mechanism brought the phenolic oligomers in close proximity, initiating polycondensation and the formation of micro porous regions. Concomitantly, the distances between the clusters increased creating meso and macroporous regions. This results in increased water fluxes due to a reduction of mass transfer resistance as pore volume increased as a function of the vacuum time.iiThe third contribution of this thesis is related to the structural formation of the titania membranes by the vacuum-assisted method. The aggregation of Ti-O-Ti networks to form titania nanoparticles increased in proportion to vacuum exposure time. Further, the thesis proposes that upon calcination the titania crystallite size increased as a function of the vacuum time, accompanied by an increase in particle size. Therefore, porosity was controlled by the inter-particle void, which is a function of the particle size. As the particle size of titania increased, the water flux of...

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Ethanol production from whey in a bioreactor coupled with direct contact membrane distillation

Tomaszewska

Białończyk

2016

Catalysis Today

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The chemical cleaning of ceramic membrane used in UF

Cited by 6 publications

References 13 publications

Effect of operating conditions on the performances of multichannel ceramic UF membranes for textile mercerization wastewater treatment

Effect of operating conditions on the performances of multichannel ceramic UF membranes for textile mercerization wastewater treatment

Investigation of vacuum-assisted preparation methods of inorganic membranes

Ethanol production from whey in a bioreactor coupled with direct contact membrane distillation

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