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PAUL station
manual
6.3 Monthly
6.3.1
Cleaning of the FWT
Fresh Water Tanks are common and well known installations. Billions exist worldwide, so
their maintenance basically is independent from the treatment method and thus has nothing
to do with the
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However, we would like to remind users that it is necessary to clean and disinfect these tanks
from time to time. We recommend to do this once per month using a solution with 5 ppm up
to 50 ppm
available
Hints on chlorine dosing are presented in chapter 8.1.
First, the tank should be cleaned manually. Then, the solution can be used. Contact with the
tank should be 30 minutes. Afterwards, flush the FWT with some filtered water.
6.4 Undefined frequency
6.4.1
Cleaning the RWT
As mentioned before, raw water will contain settleable solids. Thus, the RWT should be in-
spected from time to time and cleaned by flushing via the bottom outlet.
6.4.2
Cleaning the membrane module
Although usually
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special care or attendance, in special situations it might be favourable to also clean the
membrane module from time to time.
This can be done with a chlorine solution of ca. 5 ppm
mentioned in chapter 6.3.1. Prepare the solution by filling
and add sufficient chlorine (volume of
available chlorine).
Then let the solution soak for 30 min to 1 hour and then filter it into the FWT, and with the so-
lution that now is in the FWT, you can also clean the FWT, thus combining the cleaning of
both units.
PAUL Station Manual 2019-05-25
®
waterbackpack.
chlorine (ppm = mg/L).
®
should not be opened and the membrane module does not need
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available
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®
is ca. 100 Liter, so for 5 mg/L you need 0.5 g
chlorine (ppm = mg/L) as
®
, closing the inlet to
page 22
®
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25.05.2019
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