The Baffled Bioreactor (BBR)
 
      Extensive research has culminated in a simplified pre-anoxic/aerobic reactor capable of advanced treatment. The unique, patented positioning of the baffles and weirs in the intermediate settler (see Working Principle Diagram) acts to automatically recycle sludge from the treatment stream while reducing the load to the final clarifier. This system has demonstrated the ability to provide excellent reduction of biological oxygen demand (BOD), total suspended solids (TSS) and ammonia-nitrogen (NH3-N), with approximately 50% nitrate/nitrite removal.

    The ability of the intermediate settler to concentrate solids and immediately return them to the reactor allows for robust operation. The design of the BBR relies on air form the aerobic blowers to drive all the functions of the reactor including anoxic recycle and mixing. Minimal moving parts and electrical consumption results in a superior wastewater treatment reactor that can be operated for a fraction of the cost of conventional designs. This system was Frontier's first full design, and other BBR Technology iterations used the novelty of this system as a benchmark.
Working Principle Diagram