title: Selection of natural treatment processes for algae removal from stabilisation ponds effluents in Brasilia, using multicriterion methods.
abstract: 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.
mesh_terms: D001938:Brazil; D002947:Cities; D003657:Decision Making; D017753:Ecosystem; D056890:Eukaryota / Q000302:isolation & purification*; D008962:Models, Theoretical; D010944:Plants; D014865:Waste Disposal, Fluid / Q000379:methods*; D014867:Water
chemical_list: D014867:Water