Wastewater electrolyzers break the molecules of target pollutants and remove them from wastewater streams. In addition to purification of the water, the electrolysis process produces clean hydrogen, that can be used as a green fuel or as a useful material for industrial applications. Applicable industries for this technology are fertilizers, chemicals, semiconductors, pharma, power stations, Oil & Gas, steel and others that need to remove nitrogen from their wastewater, or produce hydrogen, recycle and reuse water, reduce GHG emissions and comply with environmental regulatory requirements.