Chlorinated aliphatic hydrocarbons (CAHs) are widespread groundwater contaminants. Bioremediation involves the stimulation of microorganisms capable of removing CAHs through the reductive dechlorination process. An innovative system for the bioremediation of groundwater involves the use of electrochemical systems that stimulate microorganisms capable of removing CAHs by providing electricity. The innovation developed is based on the application of a fixed current to the process with the aim of limiting the activity of parasitic reactions while maintaining effective removal of the contaminant and a considerable energy consumption reduction.