The first advanced online control was put into operation in 1992. Today, we hold approx. 70 references covering a total of 13 mill. PE. The references are distributed over 13 countries and amount to 600 years of operating experience.
About 25% of domestic waste water in Denmark is connected to a STAR. STAR Utility Solutions ranges from visualisation and simple calculations to advanced control using generic algorithms and model predictive control (MPC).
Selected advanced online control case studies
Increase of hydraulic capacity and reduced operating costs
In 2011, STAR Utility Solutions™ was installed. Focus was on optimum control of sludge level and capacity during rain as well as savings. The savings were primarily related to optimisation of energy consumption at N/DN phase control, oxygen supply and dosing of chemicals for precipitation.
Full control of the entire wastewatertreatment system
Slagelse WWTP + small satellite wastewater treatment plants share the same online control STAR Utility Solutions™. Download the full case study here
22% reduction in capital Investment with Sewerflex
By choosing Sewerflex, BlueKolding was able to successfully meet its environmental performance goals at a capital investment cost 22% lower than originally anticipated. Download case study "Reduction of Capital Investment at BlueKolding wastewater treatment plant"
Increased biological capacity with Bioflex
Increased N removal in the biological stage without any plant modifications or capital Investment. Stability of the effluent concentration improved considerably with significantly less variation in effluent concentrations.
Optimised control of wastewater treatment plant
Optimised control by means of the WasteWaterManager -Control reduced operating costs and improved the effluent quality to such a degree that compliance with EU's effluent discharge standards was possible. The upgrading and extension of Czajka, one of the biggest WWTPs in Europe, achieved all goals of such a large and complex environmental Investment. Download case study "A holistic control approach at Czajka WWTP"
75% reduction of overflows with Sewerflex
It was demonstrated that, the Copenhagen West wastewater utility Company would be able to successfully meet their very ambitious environmental performance goals of approximately one discharge of untreated wastewater every two years and at the same time reducing the costs by 83 percent of the costs related to the conventional alternative of expanding the storage facilitiesby implementing Sewerflex."
Download case study "Reduction of overflows in Copenhagen"
30% reduction of total nutrient pollution
Simulation studies have shown using STAR Utility Solutions™, Copenhagen is able to achieve its goal without the construction of any additional storage tanks. Download case study "Sewerflex - optimises the operation of catchment in Copenhagen"
30% increase of the treatment capacity
In 2013, Riga WWTP increased its treatment capacity by 30 percent (from 730,000 PE to 1,050,000 PE) by the installation of the BioDenitro™ process and the implementation of STAR Utility Solutions™. The financial Investment amounted to one fifth of the costs of a conventional solution, i.e. extension of the process volume. Download case study "Bioflex - minimise capital Investment in Riga"
Bioflex meets EU effluent standards
In order to avoid a costly extension of the plant, Veolia Water Technologiesin the Netherlands and Krüger suggested the implementation of onlinecontrol with focus on optimisation of the biological treatment capacity, i.e. the Bioflex which is part of the STAR Utility Solutions™.