The direct discharge of unpurified (saline) wastewater into fresh surface water is no longer acceptable. Transporting this wastewater to a sewage water treatment plant (RWZI) is not always the optimum solution. Building and managing your own plant is too expensive and too complex. What other options are available? This question was concerning a number of companies located at the Oosterhorn industrial park - the harbour district close to Delfzijl in the Netherlands.
North Water supplied the answer by constructing a saline wastewater treatment plant using the Design, Build, Finance & Operate (DBFO) concept. This activated sludge plant has a capacity of 35,000 PU (Pollution Units) and if required this capacity can be increased. Because North Water takes care of the treatment of the wastewater the companies producing the waste discharges are relieved of all cares.
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Sustainable processing of wastewater
The harbour industrial park developer "Groningen Seaports" has developed several industrial parks - Oosterhorn is one of them. Several companies at this industrial park discharged mainly saline wastewater into the surface water of the Zeehavenkanaal – ultimately, this was an environmentally undesirable situation. Therefore the treatment of most of these wastewater flows was necessary. Experience showed that, due to the high salt concentrations, it was best to treat this wastewater separately in a saline wastewater treatment plant (SWWTP).
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Process description
The water treatment plant is operated remotely and process data are registered and analysed centrally. Process engineers and technicians from North Water are responsible for the operation and maintenance, so that the effective performance of the process can always be guaranteed and the installation meets the relevant requirements of legal authorities.