PubAg

Main content area

An experimental investigation into the pre-treatment of synthetic membranes using sodium hydroxide solutions

Author:
Jones, Sarah A., Bird, Michael R., Pihlajamäki, Arto
Source:
Journal of food engineering 2011 v.105 no.1 pp. 128-137
ISSN:
0260-8774
Subject:
artificial membranes, brix, cleaning, feeds, filtration, fouling, molasses, molecular weight, sodium hydroxide
Abstract:
In this paper the effect of two pre-treatment methods are compared experimentally for the filtration of (i) a spent sulphite liquor (17.8 wt.% dry solids) using a 20kgmol⁻¹ molar mass cut off (MMCO) fluoropolymer membrane and (ii) a molasses solution (45° Brix) using a polysulphone (Psf) membrane (1.5μm pore size). Both feeds are industrially relevant, and subject to severe fouling issues when membranes are used in their subsequent processing. The pre-treatment methods evaluated were: (i) conditioning with water at 60°C only [Protocol 1], and (ii) conditioning with water at 60°C followed by cleaning with 0.5 wt.% NaOH [Protocol 2]. Results are presented that confirm the benefits of sodium hydroxide preconditioning upon performance, supporting the suggestion by some membrane manufacturers that this step be included as part of the pre-treatment protocol.
Agid:
531120