Hi Junta Hans,  If properly ...

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Hi Junta Hans, 

If properly designed the electrocoagulation system does not require electrolyte to treat paper making wastewater, more importantly it is the selection of electrodes and manner of operation.

Such device has been successfully used in certain industries, e.g. coal washing wastewater. You may leave me an email so that I can share some information with you. Wastewater itself is a good electrolyte in most of the cases.

Regards,

Steve