Electrocoagulation with EColoRO

Wastewater Treatment, Innovation / new techniques

Together with EColoR exploratory research was done at AWZI Harnaschpolder. The purpose was to investigate whether electrocoagulation is possible with domestic wastewater. Due to electrocoagulation no dosing of coagulants is needed since the desired ions are delivered by the electrodes when an electrical current is applied (either an iron electrode or an aluminum electrode can be applied as cathode or anode). The tests were done with 10 Volts and 0,5 Ampère. During the first test the iron electrode was applied as anode and during the second test the aluminum electrode.

- Tessa Steenbakker
- Marc Freyaerts
- Stefan Schot
- Han van de Griek


The results of the tests are positive. After around 8 minutes clear flocks appeared in the water (see the picture). The COD reduced from 359 mg/l to 130 mg/l and the total phosphate reduced from 7 mg/l to 0,2 mg/l. The results didn’t differ significantly between the two tested electrodes but the formed with the iron electrode were of better quality. Within about 20 minutes in both tests the water was very clear.

Start of Research
December 2016

End of Research
December 2016


- Evides Industriewater
- EColoRO


Han van de Griek
[email protected]