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All Journal Lowland Technology International
J. Ananpattarachai
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Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Diclofenac removal by submerged MF membrane photocatalytic reactor and coupling with RO membrane T.V. Tung; J. Ananpattarachai; P. Kajitvichyanukul
Lowland Technology International Vol 20 No 3, Dec (2018)
Publisher : International Association of Lowland Technology

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Abstract

The purpose of coating TiO2 on microfiltration membrane in photocatalytic membrane reactor (PMR) enhances the permeate flux and effluent quality. In this study, Nitrogen doped TiO2 (NTiO2) on ceramic membrane surface submerged in the photocatalytic reactor under visible irradiation was used for diclofenac (DCF) removal. Different photocatalytic processes including without (Vis/N-TiO2 process) and with hydrogen peroxide (H2O2) (Vis/N-TiO2/H2O2 process) were investigated. Kinetic were identified with different DCF initial concentration in bath condition for both processes. The behaviors of DCF removal by the submerged membrane photocatalytic reactor (SMPR) in combination with reverse osmosis (RO) membrane were carried out in the continuous condition in the long term. The result showed that DCF and TOC concentrations increased in the photocatalytic reactor during operation time. It was a cause of returning DCF molecules and its products to the photocatalytic reactor by the RO membrane rejection. Coupling H2O2 with the photocatalytic process enhanced the DCF and TOC removal by SMPR under the visible irradiation.
Photocatalytic membrane reactors for water and wastewater treatment applications: process factors and operating conditions review T.V. Tung; J. Ananpattarachai; P. Kajitvichyanukul
Lowland Technology International Vol 20 No 3, Dec (2018)
Publisher : International Association of Lowland Technology

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This paper aimed to overview of coupling photocatalytic process and membrane, known as photocatalytic membrane reactors (PMRs) and their potential applications in wastewater treatment, especially application for the decomposition of persistent organic matters. Mechanisms of PMRs for organic removal by photocatalytic and membrane processes are described. PMRs with suspended and immobilized TiO2 on/in the membrane are intensively reviewed. Several operating factors such as pH, initial TiO2 concentration, the concentration of pollutants, dissolved oxygen and aeration, hydraulic retention time as well as light intensity have been intensively discussed. Advantages and disadvantages of two types of PMRs are illustrated. This review is benefit to further future works such as up-scale PMRS to the industrial level, and the operating and maintenance needs for the effective PMRs.
Co-Authors P. Kajitvichyanukul T.V. Tung