MicroFAST wastewater treatment systems or MicroFITT-ee (energy-efficient version) systems from BioMicrobics are integrated into a standard septic tank. With the SFR feature, alternate modes of operation include intermittent operation of the blower to reduce electricity usage up to 45 percent and recirculation of nitrified wastewater to the primary settling chamber for added denitrification. Biosolids treatment and sludge digestion are designed to reduce treatment cost and maintenance. Available in 500- to more than 9,000-gpd configurations, technology scales up for larger residential and commercial flows. A stable treatment process with fully submerged, fixed-film media and the effectiveness of activated sludge treatment help in certain difficult applications and where there may or may not be infrastructure available, according to the maker. The effluent meets secondary quality requirements and can be distributed to a soil treatment system or water reuse applications (with drip-tubing irrigation or other nonpotable use). 913-422-0707; www.biomicrobics.com.