Sustainable water management and integrated water resources
are a priority for science and research. To avoid export of the
problem over time or space, the solution should be based on a long
and global view (Balkema et al., 2002) and sometimes can found
solutions on the decentralized systems (Tchobanoglous, 1996).
Besides the savings on transport and treatment costs, the waste is
treated in the same spot preventing externalization to further
zones and using it as a resource (Crites and Tchobanoglous, 1998).
Natural treatment systems uses natural processes to achieve the
goal of recycling (Tchobanoglous, 1996) without depending exclusively
of external energy for their performance (Reed et al., 1995).
On limnology science it is considered a stressed ecosystem acting as
an open system constantly fed with organic matter. As a consequence
succession is disrupted and the ecosystem remains in
a primitive state, mainly with phytoplankton