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The purpose of this study is to investigate a way to separate batteries out of a metal stream. This study is commissioned by IOK-MBS. IOK-MBS was set up with the aim to recuperate reusable resources out of domestic waste and create a solid recovered fuel, called SRF. A mechanical separation system segregates metals and inert materials out of a dried waste stream. The created metal stream is sold to a metal merchant who melts it. Besides all sorts of metals, the stream contains also a lot of batteries. To get a good price for the metal, the percentage of batteries in the metal stream has to be as little as possible. This study aims to give several solutions to solve this problem. First, the origin of the metal stream was investigated. The technical charts of the mechanical separation system were looked up and schematised in a diagram that gives a clear view of all the metal streams in the MBS-installation. The batteries have to be detected in these streams. For this purpose, more information about the characteristics of a battery was needed. So BEBAT, a governmental non-profit association that handles the gathering of batteries, has been visited In a second stage, a market research was started. This research aims for existing concepts that separates batteries out of a metal stream. Several products were found as result of the research. The OBS 600 from the company Optisort Refind detects the battery with a vision system. After detection, the battery is separated with an air valve. Optisort Refind only offers IOK-MBS the detection system. Every particle in the metal stream has to be photographed, so IOK-MBS has to take care of the alignment of the metal stream on the conveyer as well as the secretion of the batteries after recognition. Another company that offers a solution is ABB. They present the IRB 120, which is an industrial robot. A camera placed above a conveyer makes sure the battery is detected. After detection, the robot takes the batteries out of the metal stream. This system can be extended with a multifunctional gripper, which can also get coins out of the metal stream. In the ABB system, the stream doesn’t have to be aligned. Another system to solve the problem is a detection system with cameras from B Electrical. IOK-MBS has to take care of the alignment of the metal stream and the extraction of batteries within this metal stream. In a third stage, an own solution is invented. This solution is a combination of elements from the solutions given by the above-mentioned companies and our own input. First the metal stream is aligned by a separation system. After the alignment, a photo-electric sensor measures the length of every particle in the stream. If the length is approximately the length of a battery, a camera takes a picture of the particle. A vision-software analyses and signifies the presence of a battery at the photo. If this is true, the software sends a signal to a microcontroller who controls an air valve. The thesis describes this system both theoretical as practical. The system is build up and experimentally 57 percent of the battery could be separated out of the stream. Finally, the thesis makes a financial analysis of the four different systems. The ABB-project with standard components is non-profitable. On the other hand, with a multifunctional gripper, the ABB-solution is converted into a lucrative project.