The recourse to the use of renewable energies would solve these problems. Indeed, it would be useful to recall that
the use of renewable energies, particularly solar energy, in the various fields of the development knows an important
increase on a world level.
The recourse to the use of renewable energies would be beneficial in Algeria which is exposed to the sun the major
part of the year and must benefit from this energy which has the advantage of being an inexhaustible resource.
More especially that apart from the solar photovoltaic energy field, several other sectors’ users could benefit from it
in particular "purification from wastewater".
Indeed, this sector uses processes such as the physicochemical treatments, the activated sludge, which are expensive
and consume a lot of energy. Our article presents our contribution to the proposal for a new technique of cheap
cleaning up which is slightly dependent on fossil fuels considered as model of management integrated in a durable
design of development: the solar photocatalysis. This process uses luminous solar radiations to initiate chemical
reactions which resists attacks and the destruction of the organic pollutants and the pathogenic agents.