Monitoring systems in waste water

The need and purpose of introducing the monitoring and control system in waste waters is to ensure a more efficient and cost-effective waste waters system operation, and to enable optimum operation of the complete system with minimization of energy and maintenance costs as well as other costs. All this with added security and reliability.

By designing, developing electric cabinets, programming PLCs and SCADA applications related to telemetry solutions, Duplico systems offer complete turnkey solutions in waste waters. In the implementation of the remote monitoring and management system of waste waters systems, we have a long-standing experience. We made and connected over 300 sewerage and pumping stations.

Few years back, due to increased environmental awareness and legal regulations, the use of funds from the World Bank and the EU Utilities Funds in the Republic of Croatia has started construction projects for wastewater treatment facilities. Given the complexity of the wastewater treatment process, it is very important what kind of system is operated by the operation of the purifier itself. Duplico M2e solutions offer effective management of wastewater treatment and purification, taking into account the complexity and size of the system, the requirements of the environment in which water is released and most importantly, energy savings.

The purification process of wastewater through the purification plant (UPOV) is a very complex process that consists of several stages: At the beginning of the treatment of municipal waste water, large, scattered and floating waste materials, sand and gravel are removed from waste water.  After that, the following physical / chemical purification processes. The first stage of purification (I) means the treatment of municipal waste water by a physical / chemical process involving the deposition of suspended matter or other processes in which the BPK5 of the incoming waste water is reduced by at least 20% before discharge and the total suspended the input water content is reduced by at least 50%.

The second stage (II) of the purification means the treatment of communal waste water by a process involving biological treatment with secondary deposition or other processes according to the requirements of the Ordinance on the Limits of Hazardous and Other Substances in Waste Water (70-90% reduction in BPK5 and 75% KPC), The third stage (III) of the purification process is the treatment of municipal waste water by a process which further phosphorus and / or nitrogen (70-80%) is added to the second stage of purification in accordance with the prescribed Ordinance.

According to the Ordinance on Limit Values of Wastewater, Agglomerations of less than 2,000 ES regardless of area sensitivity, are purified by appropriate purification by any processing method. Today, in addition to the conventional mechanical biological active sludge processes, in use and SBR (Sequential Pool Reactor), is based on sequences – filling, reaction, deposition and decanting and MBR sewage treatment processes.

Purified water will be used for:

watering green areas
watering of agricultural areas
the need to water sport fields (golf courses)
the needs of washing streets and squares
fire protection requirements
washing and washing of built sewage systems during regular maintenance
other social needs
The wastewater treatment plant works with fully automated process management without the mandatory presence of the operator. The management and control system is designed in such a way that the process can be monitored from the control room, and that automatic sequential control can be performed as well as continuous regulation. The system provides the necessary equipment or process control for plant start-up, normal operation, stop and stand-offs.

The system is centralized, with the main control and monitoring station, located in the control room (NUS) of the wastewater treatment plant. From the operator display units, commands are triggered and monitored for all drive-related operations.

Duplico d.o.o. has developed the automatic wastewater treatment process algorithms, irrespective of the type and of built-in technology. All information about the status of individual devices in the UPOV, measured value values, and control is derived from the PLC and is displayed in the Visualization Programming Tool (SCADA). The automatic work is based on the levels, flow and concentration of the appropriate technological wastewater indicators, and the exact limit values of the level parameters are adjustable, allowing the UPOV operators to set them up in accordance with the requirements of the drainage system.
The basic concept of the supervisory control system is based on the fact that in each remote controlled facility there is an electro-energetic and a corresponding local automation with all relevant measuring and control equipment, which is functionally linked to the monitoring and remote control system.

In addition to local data transfer to the operator terminal with the LC display, the system allows the forwarding of information via GSM / GPRS communication to the monitoring center of the sewerage utility, as well as to other departments or emergency commanders.


Postrojenje za obradu otpadnih voda kapaciteta 1200 m3/dan (Pliva)
UPOV Kutina
UPOV Garešnica
UPV Valkane, Pula (SCADA)
Waste waters of Virovitica
Waste waters of Našice
Waste waters of Kutina
Waste waters of Pula
Waste waters of Split
waste waters of Ugljan isle

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