True Holyoak, the Small Flows Quarterly, a publication of the National Small Flows Clearinghouse, has a very comprehensive article regarding the performance of small scale, single home size, aerobic sewage treatment systems. You can view, and download this article from their website. The address is:
http://www.estd.wvu.edu/nsfc/nsfc_homepage.html
Orenco Systems, Inc. sells several different types of these systems. Orenco’s address is:
http://www.orenco.com
A word of caution; be absolutely sure that this technology is the best to serve your specific needs, as it is quite expensive, and requires a substantial amount of operation and maintenance. Some of the systems are sold under the provision that a maintenance contract be obtained with a third party to assure that the guarantee will be honored. JWA