Arango Ruiz, Álvaro de JesúsGarcés Giraldo, Luís Fernando2012-07-122012-07-1220071909-0455http://hdl.handle.net/10567/526Introduction. Milk industries generates lots of waste waters, accumulating in them the highest quantities of pollutants resulting from their processes. These waste waters content much organic matter, specially fat and oils. They also contain solid materials in suspension and pH values beyond acceptable rates for pouring. Electrocoagulation is a process that has been being developed in recent years and has been an alternative to treat waste waters from milk industries, offering many advantages when compared to traditional technologies. Objective. To study the application of electrocoagulation to treat waste waters from milk industries. Materials and methods. Waste waters were traeted with the electrocoagulation process by the use of an experimental factorial design 3X2X3, which obeys to pH variations, current density and treatment time. The response variables measured were removal percentages of COD, and fats and oils. Results. COD removals had a 94% value and fats and oils had a 99% measurement, at an acid pH and at a treatment time of 15 minutes. Conclusion. Electrocoagulation can be seen as an efficient treatment to remove pollutants from waste waters coming from industries, specifically from milk industries, like in the case of our research.esElectrocoagulaciónAguas residualesAguas residuales industrialesTratamiento de aguas residualesIndustria lecheraCelda tipo BachCorporación Universitaria LasallistaÁrea Metropolitana del Valle de AburráArticle