Selection of natural treatment processes for algae removal from stabilisation ponds effluents in Brasilia, using multicriterion methods

Selection of natural treatment processes for algae removal from stabilisation ponds effluents in Brasilia, using multicriterion methods

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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: , , ,
Keywords: geography & environment, decision theory: multiple criteria
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.

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