Article ID: | iaor2004621 |
Country: | United States |
Volume: | 46 |
Issue: | 4/5 |
Start Page Number: | 347 |
End Page Number: | 354 |
Publication Date: | Jan 2002 |
Journal: | Water Science and Technology |
Authors: | Neder K.D., Carnelro G.A., Quelroz T.R., Souza M.A.A. de |
Keywords: | geography & environment, decision theory: multiple criteria |
A multicriterion methodology is used in the evaluation and selection of the most appropriate alternative(s) for removing algae from stabilisation ponds effluents in a case study in Brasilia. For this purpose, five different natural treatment processes are tested at pilot scale: rock filter, sand filter, floating aquatic plants, constructed wetlands, and overland flow. These pilot units were constructed in Brasilia and set in parallel, each one receiving a portion of the effluent that comes from an existing wastewater treatment plant composed of preliminary treatment, UASB reactors, and high-rate stabilisation ponds. Several evaluation criteria are used in order to relate the capabilities of the post-treatment processes to the multiple objectives in this case. Two multicriterion decision-aid methods (compromise programming and ELECTRE-III) are used to select the most satisfying processes. The top ranking alternatives are indicated for subsequent studies, considering the possible implementation of these technologies to existing plants.