Cleaning Cycle Queries - Graf oneAdvanced Operation Manual

9.1.1.2 Functions of oneAdvanced larger than 10 PE
The water level is measured using the pressure
in the feed lifter during the feed phase. If the
water level in the sludge reservoir/buffer (cham-
ber 1) exceeds a preset level ("Level measuring
setting"), the plant starts a cleaning cycle. If the
level is not reached, the plant goes into cycle
pause for 6 hours. The SBR reactor is then aer-
ated only sporadically to maintain the bacterial
biotope. If the preset water level is not reached
in the first chamber after 4 consecutive meas-
urements, the plant pumps water from the reac-
tor into the first chamber via the excess sludge
lifter.
After pumping back, the plant measures the water level again. After a certain time, new feed is
therefore supplied to the reactor even with little or no wastewater supply. The normal cleaning
line can therefore be kept for long periods even in the event of absence or underload.
9.1.2

Cleaning cycle queries

The number of cleaning cycles undertaken can be queried using the "Information" item under
the "'Utilised capacity" menu. This indicates the cleaning cycles actually undertaken with the cy-
cles performed in automatic mode as a ratio and as a percentage (25% to 100% utilisation).
9. Additional controller functions
Figure 14: Charging lifter, levels in preliminary clean-
ing
76 / 137
Water level when
underload detection
activated
a
Inlet
b
Minimum
water level
C