Materials
| Name | Company | Catalog Number | Comments |
| Primary waste water | Waste water treatment plant | Taken after mechanical filtration | |
| 250 ml Round-bottom flasks with three additional inlets | Th.Geyer Berlin GmbH, Germany | 9.011 845 | Additional inlets were attached by our in-house glassblower |
| Ag/AgCl reference electrode (sat. KCl, 0.195 V vs. SHE) with ceramic diaphragm | Sensortechnik Meinsberg, Germany | SE 11 | |
| Graphite rods (Ø=1 cm, l=3 and 5 cm) | CP-Handels-GmbH, Wachtberg, Germany | Used as electrode material | |
| Stainless steel, No. 1.4301, Wire Fe/Cr18/Ni10 | Goodfellow GmbH, Bad Nauheim, Germany | 155-923-05 | |
| Silicon plugs | Th.Geyer Berlin GmbH, Germany | 9.230 512 and | |
| Parafilm | neoLab, Heidelberg, Germany | 3-1011 | For sealing to maintain anaerobic conditions |
| Potentiostat/ Galvanostat Model MPG2 | BioLogic Science Instruments, France | ||
| EC-Lab | BioLogic Science Instruments, France | software for performing electrochemistry measurements | |
| Origin 8.6 | OriginLab | data analysis software |
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