The flasks of OxiTop AN measuring system with PCBs of WEEE in growth medium inoculated with ARGCON5 and with growth medium and inoculum, 100th day of experiment. The flask with PCBs of WEEE is remarkably darker. Photo by A. Menert. The flasks of OxiTop AN measuring system with PCBs of WEEE in growth medium inoculated with ARGCON5 adapted to e-waste, with growth medium and inoculum only and with PCBs of WEEE in growth medium (without inoculum), 10th day of experiment. In the flask with all components added, gas bubbles indicate degradation of organic matter. Photo by A. Menert. The flasks of OxiTop AN measuring system with PCBs of WEEE in distilled water. The liquid phase is crystal clear without haze typical to bacterial growth. Photo by A. Menert.