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More information about the wastewater been treated need to be provided. A good review paper on EC is reported in “Environ Sci Pollut Res (2014) 21:2397–2413”. However, in Electrocoagulation, the most important is the pH that in order to help coagulating the iron and aluminum ions. Some research reported that the pH adjustment at 7, however, higher is preferable. A good paper for paper industry can be found in “doi:10.1016/j.jhazmat.2008.07.115; Journal of Hazardous Materials 163 (2009) 995–1000”. For electrolyte, depend on your electrode type, aluminium sulfate and NaCl is the most commonly used, but attention has to be taken (when NaCl is used) that electrooxidation not to occur. Thus toxic chlorinated compounds may form; see also; DOI: 10.1002/jctb.642; Journal of Chemical Technology and Biotechnology 2002, 77(7), 756–760. Hope this help