EnviroServer ES from MicroSepTec is a combination of primary treatment, flow equalization and secondary treatment by both fixed-growth and suspended-growth aerobic processes. The system consists of five chambers in one compact, pre-engineered unit. The first chamber is a primary clarifier, the second chamber is the first aeration zone, the third chamber is the second aeration zone, the fourth chamber is the final clarifier and the fifth chamber is the effluent chamber where an optional pump or pumps and disinfection device may be installed. 877/473-7842; www.microseptec.com.