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Membranes 2017, 7(1), 12; doi:10.3390/membranes7010012

Assessment of a New Silicon Carbide Tubular Honeycomb Membrane for Treatment of Olive Mill Wastewaters

1
REQUIMTE/LAQV, Department of Chemistry, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
2
Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901 Oeiras, Portugal
*
Authors to whom correspondence should be addressed.
Academic Editor: Dionysios Demetriou Dionysiou
Received: 18 January 2017 / Revised: 20 February 2017 / Accepted: 22 February 2017 / Published: 27 February 2017
(This article belongs to the Section Membrane Processes (Applications))
View Full-Text   |   Download PDF [3248 KB, uploaded 27 February 2017]   |  

Abstract

Extremely high removals of total suspended solids and oil and grease were obtained when olive mill wastewaters were filtered using new silicon carbide tubular membranes. These new membranes were used at constant permeate flux to treat real olive mill wastewaters at pilot scale. The filtration conditions were evaluated and optimized in terms of the selection of the permeate flux and flux maintenance strategies employed—backpulsing and backwashing—in order to reduce fouling formation. The results obtained reveal that the combination of backpulses and backwashes helps to maintain the permeate flux, avoids transmembrane pressure increase and decreases the cake resistance. Moreover, membrane cleaning procedures were compared and the main agents responsible for fouling formation identified. Results also show that, under total recirculation, despite an increased concentration of pollutants in the feed stream, the quality of the permeate is maintained. Membrane filtration using silicon carbide membranes is an effective alternative to dissolved air flotation and can be applied efficiently to remove total suspended solids and oil and grease from olive mill wastewaters. View Full-Text
Keywords: Silicon carbide; membrane filtration; pilot scale; olive mill wastewaters; flux maintenance strategies; fouling prevention Silicon carbide; membrane filtration; pilot scale; olive mill wastewaters; flux maintenance strategies; fouling prevention
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Fraga, M.C.; Sanches, S.; Crespo, J.G.; Pereira, V.J. Assessment of a New Silicon Carbide Tubular Honeycomb Membrane for Treatment of Olive Mill Wastewaters. Membranes 2017, 7, 12.

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