Green Technology

Oberlin College's Living Machine® is a waste water treatment system that teaches students how nature purified water for years ... but is unlike most modern systems.

" ... treats wastewater using a system of engineered ecologies that include microbes, plants, snails and insects, and is designed to treat up to 2,000 gallons of ... wastewater daily in a beautiful, garden-like atmosphere. ... Upon completion of a water- pressurization system, the treated wastewater will be recycled back through the building for non-potable re-use."

"Invented by Dr. John Todd, of Living Machines, Inc. ... Wastewater flows from the building into two underground reactors ... an anaerobic biological process begins digestion of the wastes.  ... wastewater flows through two closed aerobic reactors ... where the remaining organic compounds are further degraded. ...[then] ... enters the Living Machine® solarium and flows through three open aerobic reactors. ... plants such as papyrus, calla lilies and willows root into the planted aerobic reactors and assist in the treatment process."

" ... biosolids are settled out of the wastewater in a clarifier. ... then flows through a constructed wetland surrounding the open aerobic tanks for final ‘polishing.’ Ultraviolet disinfection is the final step prior to the treated wastewater being reused in the buildings’ toilets."

Via:  Oberlin College  LINK