Adequação das condições operacionais de uma ETA “Convencional” que trata água com cor e turbidez baixas
Water with turbidity and color apparent low to moderate are sometimes challenging to treat, especially in Water Treatment Plants (WTP) of full cycle with clarification by decantation (WTPs "conventional") because should be coagulated preferably in adsorption-neutralization mechanism loa...
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| Online Zugang: | https://repositorio.ufrn.br/jspui/handle/123456789/22087 |
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| Zusammenfassung: | Water with turbidity and color apparent low to moderate are sometimes challenging
to treat, especially in Water Treatment Plants (WTP) of full cycle with clarification by
decantation (WTPs "conventional") because should be coagulated preferably in
adsorption-neutralization mechanism loads. Such water can be coagulated in the
sweep mechanism, generally with a high dose of coagulant, to produce settleable
flocs which are removed in the decanter. However, it is also possible, in an
advantageous overall, making the water coagulation at adsorption and charge
neutralization mechanism with usually lower dose, and in this case there will be only
a destabilization of the particles and formation of tiny floc (not settleable) to be
removed on the filters. In some cases WTP enables the bypass of water directly to
the filter (with or without pre-flocculation), since the decantion units practically lost its
function and ETA, although it is physically configured as a complete cycle, it operates
as a direct filtration system. Despite the advantages of this configuration, it is
generally more difficult for the operator to find the dose and pH suitables for the
adsorption and charge neutralization mechanism. The objective was to adapt a WTP
with such characteristics. We did jartest tests simulating the complete cycle and
downstream direct filtration, and treatments as pre-oxidation, coagulation, preoxidation
with coagulation and adsorption coagulation, varying dosages of the
respective products in each treatment and at different pH. All treatments performed
attended Ordinance 2.914/11 for apparent color, but only the treatments in which
there was coagulation attended for turbidity and apparent color simultaneously, and
the best results of treatment of pre-oxidation with coagulation. |
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