Eficiencia de diferentes tipos de coagulantes na coagulacão, floculacão e sedimentacão de água com cor elevada e baixa turbidez

Content Provider	Semantic Scholar
Author	Pavanelli, Gerson Bernardo, Luiz
Copyright Year	2002
Abstract	PAVANELLI, G. (2001). Efficiency of different types of coagulants in the coagulation, flocculation and sedimentation of water with high turbidity or color. São Carlos, 2001. 216p. Dissertação (Mestrado) – Escola de Engenharia de São Carlos, Universidade de São Paulo. The purpose of this study was to use four different coagulants aluminum sulphate, iron chloride, polyaluminum hidroxichloride and ferric sulphate; to build the coagulation diagrams; and to mark the regions of higher or lower efficiency in the removal of turbidity or color. To allow a cost appraisal in the use of the coagulants, the region where the values of remaining turbidity, which are approximately the same for different coagulants, was examined in the diagrams. This being taken into consideration, the relation between consumption and cost of the chemical products was established. The coagulants that presented certain peculiarities for the studied waters were: iron chloride, that showed better performance for low pH values; the ferric sulphate, that showed itself as more economical; and the polyaluminum hidroxichloride, that functions in a large interval of pH. In the conclusion of the study, it was observed that each type of water to be treated must be analyzed through coagulation diagrams, aiming at the optimization of pH parameters versus dosages and looking for the best coagulant with lower cost.
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Ending Page	8
Page Count	8
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Alternate Webpage(s)	https://teses.usp.br/teses/disponiveis/18/18138/tde-21012003-084719/publico/Pavanelli+G.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article