Self-sufficiency pays off
SPANGLER – the Plus of Future.
The main wastewater treatment plant in Vienna intends to cover its entire energy demand with self-produced sewage gas by the year 2020 as wastewater treatment plants belong to the biggest local energy consumers. Therefore, the operating company started the project E_OS (Energy_Optimisation Sludge Treatment) in 2013. The wastewater treatment plant which is located in the 11th area of Vienna is dimensioned for four million inhabitants and was put into operation in 1980.
In the course of the energetic optimisation a large part of the wastewater treatment plant is modernised and equipped with highly efficient energetic propulsion and control systems. Therefore, the Berching-based Huber SE received the order to replace six multi-rake screens together with wash presses by current machines which are more productive and in particular more energy-efficient. Further six Huber RakeMax with a gap size of three millimeters and the corresponding wash presses WAP HD 8 will be installed for an additional fine screen level.
The entire control technology of the twelve new screens and wash presses – they already work with highly efficient PMSM motors – comes from SPANGLER Automation. And that is not all: “Our plants are both connected to the SCADA system and integrated into the emergency stop concept of the entire first cleaning stage,” Daniel Eichenseer, Project Manager, reports.
Five construction phases have already been completed and the plants for the sixth phase have been delivered for which the start-up and the trial operation are expected soon. Both the project’s dimension and the organisational process are a challenge for all persons involved as the five-year-long reconstruction of the main wastewater treatment plant is taking place during ongoing operation. Here the long-term cooperation between both companies Huber and SPANGLER pays off once again.