Operation and maintenance manual AQUAmax
®
BASIC/CLASSIC
ATB WATER GmbH, Südstraße 2, D-32457 Porta Westfalica, www.atbwater.com /
Art.-No.: 9060 0210 / Status: 30.01.2019 / Page 24 from 40
Information on Routine Maintenance
With routine maintenance tasks and examinations must be carried out by service personnel at
greater intervals. Numbers of and requirements on the routine maintenance are specified by the
lower water authorities, whereby with this the biological effectiveness is at the forefront. The plant
is equipped with a UVS
®
. As a rule, a twice a year routine maintenance is sufficient. The
examination of the treated wastewater with regard to the different parameters is also specified by
the lower water authority.
We recommend at least the following tasks are carried out:
•
Inspection of operating logbook or of the electrical logbook and reading of the operating hours
meter with determination of regular operation (target-performance comparison).
•
Extraction
of
AQUA
max
®
and removal, if necessary, of existing braids or similar in the units
•
Functional check of the operationally important mechanical, electrical and other plant
components such as aerator, pump(s), float switch and control unit.
•
Functional check of the roof (overhead) ventilation.
•
Adjustment of optimum operating values, e.g. oxygen supply (~ 2 mg/l), sludge volume (300-
500 ml/l).
•
Determination of the height of the sludge level in the sludge storage and, if required,
arrangement of sludge removal.
•
Carrying out of general cleaning tasks such as, for example, removal of deposits, removal of
foreign bodies.
•
Examination of the structural condition of the plant, e.g. corrosion, accessibility, ventilation,
screwed couplings, hoses.
Task firms for the implementation of routine maintenance, whose employees hold proof of
technical qualification and who have been trained by ATB.
The routine maintenance carried out is to be noted in the operations diary.
At least the following wastewater examinations should be carried out on the discharge
within the scope of the routine maintenance:
Investigation of a random sample of the
discharge (sampling container) for:
Investigations in the aeration tank:
•
COD
•
NH
4
-N (Discharge Classes N + D)
•
N
tot, anorg.
(Discharge Class D)
•
pH
•
Suspended
solids
•
Oxygen
concentration
•
Sludge
volume
•
Temperature
If the sample is taken out of the sampling bottle, this should previously have been
allowed to stand for at least 15 minutes. Under no circumstances shake! Through
this a possible growth on the bottle wall can be detached and falsify the analysis
results.
The sampling bottle is to be cleaned at the end of routine maintenance or exchanged for a clean
one.
The findings and tasks carried out must be documented in the routine maintenance report. This is
handed over or sent to the operator of the wastewater treatment plant with the results of the water
sample. The responsible water authority can demand sight in the operations diary and the routine
maintenance reports. Frequently, the lower water authorities demand the sending of the
maintenance report by the operator or maintenance firm, after each routine maintenance.
