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Title of article :
Definition of a practical multi-criteria procedure for selecting the best coagulant in a chemically assisted primary sedimentation process for the treatment of urban wastewater Original Research Article
Author/Authors :
Giovanni De Feo، نويسنده , , Sabino De Gisi، نويسنده , , Maurizio Galasso، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
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Abstract :
Chemically assisted primary sedimentation (CAPS) or chemically enhanced primary treatment (CEPT) consists of adding chemicals in order to increase the coagulation, flocculation and sedimentation of raw wastewater. Over the last twenty years, the use of CAPS has increased due to the development of better coagulants and flocculation enhancers, stricter standards as well as the need for low-energy treatment technologies, especially in developing countries. This paper defines a very simple multi-criteria procedure to be used in order to select the best combination of coagulant and dose when using jar tests. It is based on the adoption of the following 5 criteria: COD percentage removal, sludge volume after 2 h, coagulant dose, coagulant cost, pH percentage variation. The mathematical affordability of the procedure was tested by comparing it with the well known analytic hierarchy process.
Keywords :
CEPT , Multi-criteria analysis , Best coagulant , CAPS , Urban wastewater
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