The Fusion Series drop-in wastewater treatment system from Clarus Environmental uses anaerobic and aerobic zones to produce secondary quality effluent. Filter media are never removed or replaced. Features include constant recirculation of treated wastewater and a twice-daily automatic backwash cycle that returns residual sludge to the head of the system. A programmable compressor delivers oxygen to aerobic zones, using about the energy consumed by a 65-watt light bulb. 800/928-7867; www.clarusenvironmental.com.
