The construction of the Kastamonu Wastewater Treatment Plant (WWTP) within the designated WWTP area includes the development of a treated wastewater discharge line to Karaçomak Creek.
The wastewater entering the facility undergoes a comprehensive treatment process before being safely returned to nature. The resulting clean water is utilised for agricultural and irrigation purposes. Additionally, the treatment process has led to the formation of struvite stone as a by-product.
The WWTP was designed, constructed, and supervised in accordance with the FIDIC Yellow Book (1999 Edition), fully complying with Turkish legislation and the EU Acquis. The first phase of the treatment plant is designed to serve 138,694 residents until 2032, with the second phase expanding its capacity to 169,614 residents by 2047.
The project incorporates one of the latest technological advancements, the SCADA system, enabling seamless monitoring and management of all processes. Additionally, rather than disposing of sludge as waste, the project transforms it into a valuable resource for agricultural use. The sludge drying process further enhances this sustainability approach, with struvite emerging as a by-product. Struvite, a slow-release fertiliser, plays a crucial role in improving soil fertility and supporting plant growth.
By providing struvite and dried sludge to farmers, the project significantly contributes to the circular economy, effectively closing the nutrient loop. This innovative approach reduces dependence on synthetic fertilisers, conserves natural resources, and minimises the environmental impact associated with conventional agricultural practices. By supporting local farmers with these sustainable resources, the project fosters the development of a self-sufficient and environmentally friendly agricultural system while reinforcing circular economy principles.
In this regard, we strongly believe that the project deserves the FIDIC Contracts Project of the Year award. Beyond being a wastewater treatment initiative, it stands as a benchmark for environmental sustainability, technological innovation, and circular economy practices, setting an example for future projects worldwide.
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Eptisa Mühendislik ve Müşavirlik Hiz. Bil. İnş. Tic. Ltd. Şti. (TR) in consortium with STANTEC Mühendislik ve Müşavirlik and EPTISA Servicios de Ingenieria, S.L. (ES)
General Directorate of European Union and Foreign Relations, Ministry of Environment and Urbanisation















