Assessment of a new silicon carbide tubular honeycomb membrane for treatment of olive mill wastewaters

Maria C. Fraga, Sandra Sanches, João G. Crespo, Vanessa J. Pereira

Research output: Contribution to journalArticle

7 Citations (Scopus)

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.

Original languageEnglish
Article number12
JournalMembranes
Volume7
Issue number1
DOIs
Publication statusPublished - Mar 2017

Fingerprint

Silicon carbide
Wastewater
Membranes
Fluxes
Lubricating greases
Fouling
Flotation
Cleaning
Oils
silicon carbide
Air

Keywords

  • Flux maintenance strategies
  • Fouling prevention
  • Membrane filtration
  • Olive mill wastewaters
  • Pilot scale
  • Silicon carbide

Cite this

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title = "Assessment of a new silicon carbide tubular honeycomb membrane for treatment of olive mill wastewaters",
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.",
keywords = "Flux maintenance strategies, Fouling prevention, Membrane filtration, Olive mill wastewaters, Pilot scale, Silicon carbide",
author = "Fraga, {Maria C.} and Sandra Sanches and Crespo, {Jo{\~a}o G.} and Pereira, {Vanessa J.}",
note = "The authors thank Adventech for supplying the wastewater matrices and Liqtech for supplying the silicon carbide membranes used in this study, in the frame of EC project O-WaR. Financial support from the EU FP7/SME theme [SME-2013-1] through the project O-WaR (grant agreement no: 605641) as well as from FCT through the post-doc fellowship SFRH/BPD/94303/2013 are gratefully acknowledged. iNOVA4Health-UID/Multi/04462/2013, a program financially supported by Fundacao para a Ciencia e Tecnologia/Ministerio da Educacao e Ciencia, through national funds and co-funded by FEDER under the PT2020 Partnership Agreement, is also gratefully acknowledged. This work was also supported by the Associate Laboratory for Green Chemistry LAQV which is financed by national funds from FCT/MEC (UID/QUI/50006/2013) and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007265).",
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Assessment of a new silicon carbide tubular honeycomb membrane for treatment of olive mill wastewaters. / Fraga, Maria C.; Sanches, Sandra; Crespo, João G.; Pereira, Vanessa J.

In: Membranes, Vol. 7, No. 1, 12, 03.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Assessment of a new silicon carbide tubular honeycomb membrane for treatment of olive mill wastewaters

AU - Fraga, Maria C.

AU - Sanches, Sandra

AU - Crespo, João G.

AU - Pereira, Vanessa J.

N1 - The authors thank Adventech for supplying the wastewater matrices and Liqtech for supplying the silicon carbide membranes used in this study, in the frame of EC project O-WaR. Financial support from the EU FP7/SME theme [SME-2013-1] through the project O-WaR (grant agreement no: 605641) as well as from FCT through the post-doc fellowship SFRH/BPD/94303/2013 are gratefully acknowledged. iNOVA4Health-UID/Multi/04462/2013, a program financially supported by Fundacao para a Ciencia e Tecnologia/Ministerio da Educacao e Ciencia, through national funds and co-funded by FEDER under the PT2020 Partnership Agreement, is also gratefully acknowledged. This work was also supported by the Associate Laboratory for Green Chemistry LAQV which is financed by national funds from FCT/MEC (UID/QUI/50006/2013) and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007265).

PY - 2017/3

Y1 - 2017/3

N2 - 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.

AB - 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.

KW - Flux maintenance strategies

KW - Fouling prevention

KW - Membrane filtration

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KW - Pilot scale

KW - Silicon carbide

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U2 - 10.3390/membranes7010012

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JO - Membranes

JF - Membranes

SN - 0076-6356

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