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Membrane filtration for particles removal after ozonation-biofiltration.
Water Sci Technol. 2007; 56(10):101-8.WS

Abstract

With the process combination Ozonation-Biofiltration-Membranefiltration (the OBM-process) an average removal of 63% for UV-absorbance (UV(254)), 79% for color, and 28% for DOC was obtained treating NOM containing surface water. In this paper, focus has been made on the removal of particles after the ozonation and biofiltration treatment steps, using a submerged hollow fiber ultrafiltration membrane reactor. For this purpose the membrane performed adequately. The ultrafiltration step did not have a significant impact on the removal of color, UV(254), and DOC. However, the SS and the heterotrophic plate count (HPC) was almost completely removed, and the turbidity was reduced by 65% by the membrane filtration, even at very high fluxes. Fouling occurred during operation, and operational factors of both the ozonation/biofiltration and the membrane reactor were important for controlling this. The experiments at pH 6.5 gave a higher permanent fouling than at pH 8.5, which was caused by the different oxidation pathways and consequently by the change in size and hydrophobicity of the by-products. On the other hand, the reversible fouling was less important at low pH. The mechanical cleaning was efficient, however, it seemed that the air scouring participated to the formation of submicron particles which favored the fouling.

Authors+Show Affiliations

Osterhus S
Department of Hydraulic and Environmental Engineering, University of Science and Technology, S.P.Andersensvei 5, Trondheim, Norway.
Azrague K
No affiliation info available
Leiknes T
No affiliation info available
Odegaard H
No affiliation info available

MeSH

CarbonFiltrationOxidantsOzoneWater PollutantsWater Purification

Pub Type(s)

Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18048982

Citation

Osterhus, S, et al. "Membrane Filtration for Particles Removal After Ozonation-biofiltration." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 56, no. 10, 2007, pp. 101-8.
Osterhus S, Azrague K, Leiknes T, et al. Membrane filtration for particles removal after ozonation-biofiltration. Water Sci Technol. 2007;56(10):101-8.
Osterhus, S., Azrague, K., Leiknes, T., & Odegaard, H. (2007). Membrane filtration for particles removal after ozonation-biofiltration. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 56(10), 101-8.
Osterhus S, et al. Membrane Filtration for Particles Removal After Ozonation-biofiltration. Water Sci Technol. 2007;56(10):101-8. PubMed PMID: 18048982.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Membrane filtration for particles removal after ozonation-biofiltration. AU - Osterhus,S, AU - Azrague,K, AU - Leiknes,T, AU - Odegaard,H, PY - 2007/12/1/pubmed PY - 2008/2/22/medline PY - 2007/12/1/entrez SP - 101 EP - 8 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci Technol VL - 56 IS - 10 N2 - With the process combination Ozonation-Biofiltration-Membranefiltration (the OBM-process) an average removal of 63% for UV-absorbance (UV(254)), 79% for color, and 28% for DOC was obtained treating NOM containing surface water. In this paper, focus has been made on the removal of particles after the ozonation and biofiltration treatment steps, using a submerged hollow fiber ultrafiltration membrane reactor. For this purpose the membrane performed adequately. The ultrafiltration step did not have a significant impact on the removal of color, UV(254), and DOC. However, the SS and the heterotrophic plate count (HPC) was almost completely removed, and the turbidity was reduced by 65% by the membrane filtration, even at very high fluxes. Fouling occurred during operation, and operational factors of both the ozonation/biofiltration and the membrane reactor were important for controlling this. The experiments at pH 6.5 gave a higher permanent fouling than at pH 8.5, which was caused by the different oxidation pathways and consequently by the change in size and hydrophobicity of the by-products. On the other hand, the reversible fouling was less important at low pH. The mechanical cleaning was efficient, however, it seemed that the air scouring participated to the formation of submicron particles which favored the fouling. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/18048982/Membrane_filtration_for_particles_removal_after_ozonation_biofiltration_ DB - PRIME DP - Unbound Medicine ER -