Residential STAAR (Smart Trickling Anaerobic Aerobic Recirculating) filter systems from SeptiTech are ETV-EPA-verified, NSF/ANSI Standard 40 class 1 and NSF/ANSI Standard 245 certified.Whether installed in plastic or locally sourced concrete tanks, this decentralized wastewater treatment system uses an enhanced, biological, unsaturated media filter process. The passive aeration method sprays oxygenated water over the biofilter media, allowing it to trickle through the media for optimum growth. They enable high reduction in BOD/TSS/TN and accommodate peak flows, batch treatment and nitrogen removal. With minimal operator oversight, the automatic operation of the system uses a PLC-based controller for continuous operation, time-dosing, field process customization, automatic recirculation of wasted sludge to the settling tank, self-cleaning media/processor and sleep mode for enhanced energy efficiency. An optional UV disinfectionsystem allows for compatibility with shallow drip, direct discharge, pressure distribution or conventional leachfields. 800/318-7967; www.septitech.com.