Specifications: The "Clos Mirabel" tourist unit in Pau with its 3 Villas operates through out the year. The owner is interested in having a wastewater treatment plant operating ecologically resulting in cost-savings which are:

- No external energy input
- No chemicals
- No machinery
- No maintenance
- No sludge production or removal

Further more the Root Zone System treats and humificates the primal sludge without any need of septic tank.
The Root Zone system fits harmoniously amids the natural landscape of oak trees. During the summer period the system's cleaning efficiency is 100 %. There is no effluent because of the evapo-transpiration in the summer period. Thus the system causes no environmental loading.

Technical Characteristics:
Unit's capacity: 30 P.E.
Size of the ROOT ZONE plant: 150m2
Year of construction: 2013