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7.3 MBR Membrane Cleaning
7.3.1 Membrane In-situ Chemically Enhanced Backflush (CEB)
Chemical cleaning is only to be carried out by qualified and trained
personnel! Chemicals can lead to serious injuries. Always wear
personal protective equipment (PPE) when handling chemicals! Obey
the chemical safety handling procedure as listed in the Material Safety
Data Sheets.
It is recommended that in-situ CEB be carried out before the TMP exceeds 0.25 bar (or
permeability drops rapidly to 50 LMH/bar) This is typically done once every couple
weeks/months depending on biomass characteristics and system operating condition.
On certain occasions, membrane module/cassette may need to be physically inspected for
membrane integrity if membrane permeability performance is not recovered after the cleaning
(i.e., suspect of membrane deterioration); please refer to subsection 7.3.3.
Note: Membrane have a maximum active chlorine tolerance of 100,000 ppm.h.
For better cleaning performance, it is recommended:
Potable water (permeate is acceptable if potable water is unavailable)
Water temperature is above 20
0
20 to 30
C)
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All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means, electronic, mechanical,
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The maximum backflush pressure of MicroClear
0.1 bar or equivalent to a 100 cm water line. Only use gravity
force to perform the backflush.
0
C (better cleaning efficiency if water temperature ranges from
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(800) 420-4056 / www.newterra.com
TM
MCXL filter is
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97
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