Caribbean Environment Programme - UNEP

UNEP(DEC)/CAR WG.18/6
Anexo V
Apéndice 2
Página 6
The treatment plant will consist of a series of 1 to 1.5 mm rotary screens and centrifuge
de-sludgers. The land portion of the outfall will measure 20 km, with a diameter of 1.83 m, a
submerged length of 2,880 m, a depth of 20 m and a diffusor section of 540 m, with 27 dual
outlets.
The combination of the type of treatment and disposal method will ensure, together with
the local conditions at the point of discharge, compliance with the water quality standards for the
most restrictive uses envisaged in Colombian environmental legislation. Concretely, the sanitary
condition of the beaches will be protected, and the primary contact standard of 200 MPN/100 ml
of faecal coliform will be met.
A monitoring programme and contingency plan will allow for the evaluation of the
system’s effectiveness and for consequent action to guarantee the safety of the effluent. In
addition, a 20-hectare zone will be available next to the treatment plant for future expansion if
demands arise for the re-use of the effluent or future environmental requirements. A social
management and communication programme, for the purpose of mitigating the impact and
providing information about the situation and progress of the project, will be included.
Main Conclusions and Recommendations
Private participation in the provision of public water, sanitation and municipal
wastewater management shows good signs of success and appears to be effective in
extending the coverage of these services to the poorest sectors
The mechanism makes it easier to finance and mobilize resources to meet these needs
Each case of wastewater management is specific, and the solution adopted should be
specific and appropriate to the concrete situation in which it is applied
The uses for which the receiving body of water is intended should be taken into account,
and quality targets that are consistent with such uses should be established
The effluent limits should ensure that quality standards in the receiving bodies of water
are being met
Treatment and disposal systems as a whole should take into account priorities and
capacities and should be feasible and flexible enough to be adaptable to future
requirements or needs.