Screencap demonstrates at full scale a promising finescreen technology to recover suspended solids from waste water on the basis of particle size. The installation removes sieved material, consisting of cellulose fibres originating mainly from toilet paper, at the beginning of the waste water treatment process. This increases the treatment capacity and produces a cellulose residual stream that can be used in the production of energy and other possible applications, such as road construction and in the chemical industry. Finescreens have potentially significant advantages in comparison with existing solid separation technologies based on density differences. These benefits include a significant reduction of chemicals and energy demands and the opportunity to recover energy and other resources from the waste water.Screencap adapted, installed and operates at full scale the finescreen technology at one of the two identical parallel treatment trains of a waste water treatment plant in the Netherlands. Comparison with the other treatment train enables to establish the performance of the finescreen technology. A dedicated impact assessment is part of the project.Using the reference, the project will develop actions for further uptake of the finescreen technology. Project outcomes are disseminated through the project website (www.screencap.eu), communications to relevant target groups and presence at trade fairs.The Screencap consortium :BWA, WSAM and KWR.
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Compared to the current state of the art solutions this concept has a number of significant advantages with an enormous impact:
- Reduction of the volume of sludge that has to be transported, and thus a very strong reduction of transport movements.
- Significant reduction of chemical requirements of the WWTP.
- Reduction of aeration energy (approximately 15%) because of the reduced load to the biological treatment process.
- Smaller WWTP footprint of approximately 25%.
- The finescreen technology is designed, implemented and (since mid 2016) operational at full scale at the waste water treatment plant of Aarle-Rixtel.
- A monitoring programme is designed and in execution to demonstrate the benefits of the finescreen technology.
- The project gathered information on the market opportunities for the finescreen concept.
- The project will deliver a tool to support decision makers. This tool will provide technical and economic data and enables to benchmark the finescreen technology against alternative solutions.