The unique control mechanism of the TOPAS WWTP is the   emergency floating switch connected with sound signaling which reacts to any overloading of the accumulation tank. Since the origination of the patent in 2004 to the present, various additional accessories have been developed for the TOPAS WWTP which improves control. One of these accessories is the TOM monitoring module which permanently monitors (but does not control) the operation of the WWTP. Each deviation from normal function is registered, evaluated and reported on the control unit display. The majority of defects are discovered according to the number of times and the length of duration of the switching on of one of the two floating switches.

Its main function is to monitor the activity of the float switch and correct the function of the wastewater treatment plant according to the number of switching and time delays between them. The principle of the cleaning of the wastewater is also ensured by patent No. 282 411 by means of the control float switch directly in the wastewater treatment plant. This means, that in the case of a failure in monitoring system the wastewater treatment plant will still operate normally.  

Due to the very simple system of switching cleaning phases using the patent protected floating switch, it is possible to maintain a constant level of activated sludge necessary for the correct function of the treatment. Excess sludge is stored in the separate sludge tank and if there is no inflow of wastewater, the content of the sludge tank will fall into the inflow accumulation tank and become an alternative nutrient in the cleaning process. In this manner the wastewater treatment plant is kept in operation without an inflow of domestic wastewater for a minimum of three months without death of or other damage to the bacterial culture.

TOPAS WWTP’s were initially presented as treatment plants with easy maintenance. This statement is still justified today by the principle of the patent which is supported by the existence of two floating switches which control the operation of the treatment plant. Due to these switches a permanent concentration of activated sludge is kept and the water treatment plant only pumps excess sludge into the separate tank approximately once every three months. Another measure for the simplification of servicing and maintenance of the wastewater treatment plant is automatic cleaning of sedimentation tanks from the floating waste. Nearly all of the whole wastewater treatment plant is made of a non-corrosive complete plastic construction with the exception of all mechanical, i.e. rotating and moving parts.