Feasibility Study on Phosphorus Recovery at the Linz Wastewater Treatment Plant

The sustainable recovery of phosphorus from wastewater streams and sewage sludge is a key component of modern wastewater treatment and circular economy practices. Phosphorus is an essential yet limited resource, and its recovery not only contributes to resource conservation but also reduces environmental impacts such as eutrophication. As part of this project, a feasibility study on phosphorus recovery at the Linz wastewater treatment plant is being conducted to evaluate the technical, economic, and ecological feasibility of suitable technologies. The analysis of the initial situation includes a detailed examination of the composition and properties of wastewater streams and sewage sludge based on data provided by Linz AG. Additionally, the existing infrastructure and current processes of the treatment plant are assessed to identify potential interfaces for the integration of recovery technologies. In the next step, various phosphorus recovery technologies are evaluated and compared in terms of their efficiency, costs, feasibility, and environmental compatibility. Publicly available data, as well as data provided by Linz AG, are utilized to ensure a realistic assessment of the costs and potential of the technologies. Based on the findings, an action plan will be developed, outlining scenarios for the implementation of suitable technologies. These scenarios take into account both technical and economic conditions and provide a decision-making basis for future implementation. The results of the study will be summarized in a detailed report, which will serve as the foundation for sustainable and resource-efficient phosphorus recovery at the Linz wastewater treatment plant. This project makes an important contribution to the circular economy and to meeting legal requirements for phosphorus recovery.