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9. System
start-up
Open at least one of the shower, bathtub or hand wash basin connected to the system. Fill the
bioreactor with potable water up to the level of 800mm.
9.1 Tightness
test
Attention:
The water tightness of all screw fixings of the membrane station is particularly important so that none
of the contaminated water is able to contaminate the treated water. Furthermore, any wastewater
which accidently enters through poorly tightened screw fittings is sent to the membranes hollow fibres
which may cause clogging of the fibres. Therefore, a water tightness test must be performed before the
start-up process.
PROCEEDURE: Before connecting the blower hose to the aeration pipe, it should be connected to the
¾" connection on top of the back flushing tank in order to pressurize the membrane station with air
pressure (0.2bar). (The required adapter (3/4" IG x Ø25 sleeve) is included in scope of delivery.)
Then the blower is started in test mode. The membrane station is then immersed in tank water up to
the mid line of the back flushing tank. If no bubbles can be seen in the water then all screw connections
are water tight and the assembly can be finally installed.
Note:
run the test for 5 minutes!
9.2 Start-up phase of the bioreactor
The microbiology builds up in the grey water tank within few weeks as a result of continuous grey water
supply. Until that time, there may be variations in the biological cleaning.
The water must be injected with biology in order to guarantee a satisfactory biological treatment ealier
than 3 weeks rom start up. For this purpose, 25% of the support material used by the existing and
previous greywater system must be fed to the bioreactor.
The setting are perfomed as per descripton in Chapter 9.3. Also the start-up phase is started as per the
description in Chapter 9.3.
In the first 3 weeks of system operation the treated water should not ne used and sent to the sewer.
After 3 weeks of biological activity the daily treated water can be safely used.
