Denitrification and pH control using bio-electrochemical systems

A bio-electrochemical system for treating a plurality of incoming streams of wastewater comprising:

• one or more pre-treatment tanks for receiving and pre-treating the plurality of incoming streams of wastewater;
• at least one removable reaction module configured to receive one or more of the plurality of incoming streams of wastewater and comprising:
• a flat, substantially conductive electron donating structure sandwiched between two flat, substantially conductive electron accepting structures arranged in succession and in substantial proximity to each other and a selectively permeable membrane bordering each of the flat, substantially conductive electron donating structures and each of the two flat, substantially conductive electron accepting structures, or
• a flat, substantially conductive electron accepting structure sandwiched between two flat, substantially conductive electron donating structures arranged in succession and in substantial proximity to each other and a selectively permeable membrane bordering each of the flat, substantially conductive electron accepting structures and each of the two flat, substantially conductive electron donating structures,
• wherein one or more of the electron accepting or electron donating flat, substantially conductive structures are coated with at least one microbial biofilm, and the at least one removable reaction module is configured to separately and substantially simultaneously flow one or more of the plurality of incoming streams of wastewater over the electron donating structures and one or more of the plurality of incoming streams of wastewater over the electron accepting structures, and
• a controller connected to the flat substantially conductive electron accepting and donating structures for controlling operation and for sending system data to a remote server.