Operating instructions AQUAMAX
®
PRO G
ATB WATER GmbH, Südstraße 2, D-32457 Porta Westfalica, www.atbwater.com /
Art.-No.: 9060 0272 / Status: 24 February 2021 / Page 6 from 36
Functional description
The sewage treatment plant operates according to the activated sludge principle in the back-up
process (SBR plant). The pollutants from the waste water are absorbed by floating microorganisms
(activated sludge) and converted into biomass.
A correspondingly large buffer volume is taken into account for buffering large quantities of waste
water that occur at peak times (e.g. hall operation of restaurants on weekends, commercial
operations).
The wastewater first enters the coarse trap/sludge storage tank and then into the buffer chamber.
At regular intervals, the waste water is pumped into the SBR chamber. When a maximum water
level is reached during revival, the pumping process is stopped. When a minimum water level is
reached in the buffer tank or after the preset charging time has elapsed, the pumping process is
terminated. Aeration occurs intermittently via a submersible motor aerator or a compressor and
diaphragm tube aerator. After approx. 6 hours the aeration phase ends and the settling phase
begins.
After a settling time of 1.5 hours, the treated wastewater is pumped off with the clear water pump.
The switch-off point of the pump is set via a float switch. If this minimum water level cannot be
reached due to a pump fault, an alarm is triggered. After approx. 8 hours the cycle ends with the
end of the clear water discharge and a new cycle begins.
The system reaches its full cleaning performance after a start-up time of approx. one month. In the
case of strong underload or temperatures below 12° C, it can also take longer for the biology to
develop completely. In this case it is recommended to inoculate with activated sludge to accelerate
this process.
The control system can be adapted to the particular case of need. During commissioning, the
system is set to the maximum number of persons connected. It is not necessary to change this
setting in the event of a short-time overload or underload.
Economic operation
If no wastewater flows into the system over a period of more than 4 hours, the system
automatically switches to energy-saving economic operation. The aeration time is reduced to such
an extent that the microorganisms have sufficient oxygen available. Under normal load, the system
switches back to the set operating mode.
(alternatively: pressure aeration)