AdvanTex AX-Max containerized, fully plumbed, plug-and-play wastewater treatment systems from Orenco Systems are sized for larger commercial and municipal applications. Units come in a variety of configurations, measuring up to 42 by 8.5 feet, and can be installed singly or in multi-unit arrays, either above ground or buried to grade. They use an attached growth treatment method to produce clear, odorless effluent with significant nutrient reduction, suitable for subsurface irrigation or surface discharge after disinfection. One unit can process up to 5,000 gpd of raw sewage or 15,000 gpd of primary-treated effluent. Units reduce nitrogen up to 90 percent, depending on configuration, and provide reliable performance with only a part-time operator. When installed as a two-stage system, the system can virtually eliminate ammonia. Units are easy to ship and set, and have been installed in a variety of soils and climates all over the world. 800/348-9843; www.orenco.com.