Black tea liquor ultrafiltration

effect of ethanol pre-treatment upon fouling and cleaning characteristics

Iain Argyle, Arto Pihlajamӓki, Michael Bird

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5 Citations (Scopus)
32 Downloads (Pure)

Abstract

tThis paper reports on the use of polymeric ultrafiltration (UF) membrane ethanol pre-treatment as a strategy toimprove filtration performance in terms of both flux increase, and membrane water flux recovery following cleaning.A 4-fold pure water flux (PWF) increase was observed for a 100 kDa polysulfone membrane. Marked increases inpermeate flux were recorded for ethanol treated UF membranes over a range of molecular weight cut-off values.Ethanol treatment also aided fluxes over multiple foul-clean cycles, and enabled the enhanced transmission ofpolyphenols during UF for the clarification of black tea liquor. Following tea fouling and NaOH cleaning repetitions,PWF values of treated membranes were returned to values of >150% of the untreated virgin membrane PWF over4/5 consecutive cycles, indicating that the ethanol pre-treatment strategy adopted had a prolonged effect uponsubsequent performance.
Original languageEnglish
Pages (from-to)289 - 297
Number of pages9
JournalTransactions of the Institution of Chemical Engineers Part C: Food and Bioproducts Processing
Volume93
Early online date24 Oct 2014
DOIs
Publication statusPublished - Jan 2015

Fingerprint

black tea
Ultrafiltration
fouling
Tea
ultrafiltration
Fouling
cleaning
Cleaning
Ethanol
pretreatment
ethanol
Fluxes
Membranes
Water
water
tea
molecular weight
Polysulfones
Molecular Weight
Molecular weight

Cite this

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title = "Black tea liquor ultrafiltration: effect of ethanol pre-treatment upon fouling and cleaning characteristics",
abstract = "tThis paper reports on the use of polymeric ultrafiltration (UF) membrane ethanol pre-treatment as a strategy toimprove filtration performance in terms of both flux increase, and membrane water flux recovery following cleaning.A 4-fold pure water flux (PWF) increase was observed for a 100 kDa polysulfone membrane. Marked increases inpermeate flux were recorded for ethanol treated UF membranes over a range of molecular weight cut-off values.Ethanol treatment also aided fluxes over multiple foul-clean cycles, and enabled the enhanced transmission ofpolyphenols during UF for the clarification of black tea liquor. Following tea fouling and NaOH cleaning repetitions,PWF values of treated membranes were returned to values of >150{\%} of the untreated virgin membrane PWF over4/5 consecutive cycles, indicating that the ethanol pre-treatment strategy adopted had a prolonged effect uponsubsequent performance.",
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T2 - effect of ethanol pre-treatment upon fouling and cleaning characteristics

AU - Argyle, Iain

AU - Pihlajamӓki, Arto

AU - Bird, Michael

PY - 2015/1

Y1 - 2015/1

N2 - tThis paper reports on the use of polymeric ultrafiltration (UF) membrane ethanol pre-treatment as a strategy toimprove filtration performance in terms of both flux increase, and membrane water flux recovery following cleaning.A 4-fold pure water flux (PWF) increase was observed for a 100 kDa polysulfone membrane. Marked increases inpermeate flux were recorded for ethanol treated UF membranes over a range of molecular weight cut-off values.Ethanol treatment also aided fluxes over multiple foul-clean cycles, and enabled the enhanced transmission ofpolyphenols during UF for the clarification of black tea liquor. Following tea fouling and NaOH cleaning repetitions,PWF values of treated membranes were returned to values of >150% of the untreated virgin membrane PWF over4/5 consecutive cycles, indicating that the ethanol pre-treatment strategy adopted had a prolonged effect uponsubsequent performance.

AB - tThis paper reports on the use of polymeric ultrafiltration (UF) membrane ethanol pre-treatment as a strategy toimprove filtration performance in terms of both flux increase, and membrane water flux recovery following cleaning.A 4-fold pure water flux (PWF) increase was observed for a 100 kDa polysulfone membrane. Marked increases inpermeate flux were recorded for ethanol treated UF membranes over a range of molecular weight cut-off values.Ethanol treatment also aided fluxes over multiple foul-clean cycles, and enabled the enhanced transmission ofpolyphenols during UF for the clarification of black tea liquor. Following tea fouling and NaOH cleaning repetitions,PWF values of treated membranes were returned to values of >150% of the untreated virgin membrane PWF over4/5 consecutive cycles, indicating that the ethanol pre-treatment strategy adopted had a prolonged effect uponsubsequent performance.

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U2 - 10.1016/j.fbp.2014.10.010

DO - 10.1016/j.fbp.2014.10.010

M3 - Article

VL - 93

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JO - Food and Bioproducts Processing

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SN - 0960-3085

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