Odours; Noise Levels - Graf oneAdvanced Operation Manual

11.6 Odours

Operating a wastewater treatment system can give rise to odours. This is predominantly the
case in anaerobic conditions (no oxygen dissolved in the water), e.g. in the preliminary cleaning
stage. This can form ammonia (NH
In all cases, the exhaust air should carry any odours out of the plant and through the roof venti-
lation. Fully operative roof ventilation is therefore important.
Observation
Odours in the building
Odours at the tank
Odours only on certain
days (e.g. weekends)
Odours only in sultry
weather

11.7 Noise levels

The switch cabinet generates noise; specifically, compressor humming (comparable with a re-
frigerator), cooling fan noise (if fitted), and the control unit's acoustic alarm. The other compo-
nents are virtually soundless. If you can hear a loud humming or vibration, check whether the
compressor has shifted its position in the cabinet and is touching the cabinet wall directly or indi-
rectly (e.g. cables) If necessary, reposition the components or notify a specialist.
11. Fault messages and rectification
), hydrogen sulfide (H
3
Possible cause
Conduit at the cabinet's site not
closed properly (when odours in
this room)
Siphon has run dry; frequently
floor drains or other rarely
"used" facilities
Technical problem, e.g. too little
aeration
Roof ventilation not working
properly
Overload as a result e.g. of
many visitors, laundry day, etc.
Roof ventilation not working or
properly or to capacity (natural
phenomenon)
105 / 137
S), organic acids, etc.
2
Rectification
Reseal conduit
Refill with water from a
watering can
Commission a specialist
Try to distribute the peaks
better
Have a specialist identify
potential optimisations for
the settings
-