Bioelectrochemical reactors are finding an application in wastewater treatment settings. Current activated sludge processes are energy- and cost-inefficient due to sludge maintenance, aeration needs, and energy needs. By using a bioelectrochemical reactor that utilizes the concept of trickling filtering, these inefficiencies can be addressed. While processing wastewater using this reactor, nitrification, denitrification, and organic matter removal all take place simultaneously in both aerobic and anaerobic conditions using multiple different microbes located on the anode of the system. Though the processing parameters of the reactor affect the overall composition of each microbe, genus Geobacter and genus Desulfuromonas are frequently found in these applications.