Treatment of secondary effluent by sequential combination of photocatalytic oxidation with ceramic membrane filtration

Song, L, Zhu, B, Jegatheesan, J, Gray, S, Duke, M and Muthukumaran, S 2018, 'Treatment of secondary effluent by sequential combination of photocatalytic oxidation with ceramic membrane filtration', Environmental Science and Pollution Research, vol. 25, no. 6, pp. 5191-5202.


Document type: Journal Article
Collection: Journal Articles

Title Treatment of secondary effluent by sequential combination of photocatalytic oxidation with ceramic membrane filtration
Author(s) Song, L
Zhu, B
Jegatheesan, J
Gray, S
Duke, M
Muthukumaran, S
Year 2018
Journal name Environmental Science and Pollution Research
Volume number 25
Issue number 6
Start page 5191
End page 5202
Total pages 12
Publisher Springer
Abstract The aim of the present work was to experimentally evaluate an alternative advanced wastewater treatment system, which combines the action of photocatalytic oxidation with ceramic membrane filtration. Experiments were carried out using laboratory scale TiO2/UV photocatalytic reactor and tubular ceramic microfiltration (CMF) system to treat the secondary effluent (SE). A 100-nm pore size CMF membrane was investigated in cross flow mode under constant transmembrane pressure of 20 kPa. The results show that specific flux decline of CMF membrane with and without TiO2/UV photocatalytic treatment was 30 and 50%, respectively, after 60 min of filtration. Data evaluation revealed that the adsorption of organic compounds onto the TiO2 particles was dependent on the pH of the suspension and was considerably higher at low pH. The liquid chromatography-organic carbon detector (LC-OCD) technique was used to characterise the dissolved organic matter (DOM) present in the SE and was monitored following photocatalysis and CMF. The results showed that there was no removal of biopolymers and slight removal of humics, building blocks and the other oxidation by-products after TiO2/UV photocatalytic treatment. This result suggested that the various ions present in the SE act as scavengers, which considerably decrease the efficiency of the photocatalytic oxidation reactions. On the other hand, the CMF was effective for removing 50% of biopolymers with no further removal of other organic components after photocatalytic treatment. Thus, the quantity of biopolymers in SE has an apparent correlation with the filterability of water samples in CMF.
Subject Membrane and Separation Technologies
Wastewater Treatment Processes
Keyword(s) Ceramic membrane
Fouling
Microfiltration
Photocatalytic processes
Secondary effluent
Size exclusion chromatography
DOI - identifier 10.1007/s11356-017-9070-x
Copyright notice © 2017, Springer-Verlag Berlin Heidelberg.
ISSN 0944-1344
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