On-line Monitorization In A
Decarbonator-settling Tank For Water Treatment
Author(s)
A. Tijero, A. Moral, J. Tijero, A. Blanco & C. Negro
Abstract
The objective of this work is the on-line control of the solid-liquid separation
process in a water treatment plant using a focused beam reflectance measurement
sensor (FBRM) in order to improve the coagulation, precipitation and
flocculation of this plant. A previous study of the system is carried out in order
to analyze the possible influence of the external variables on the floc mean chord
size though of the monitorization of the flocculation tank. The formation of
particle aggregates is the product of the addition of an inorganic flocculant
(FeCl3) with a subsequent treatment with an organic synthetic flocculant (anionic
polyacrilamide) that determine the formed floc properties. The FBRM study of
the variations of the mean chord size realised after the changes in the system
show an improvement in flocculant diffusion and a greater phase contact. The
final objective is to improve the calcium carbonate precipitation conditions, to
reduce the membrane fouling and avoid the deposit formation in the plant
surface. The trials carried out a characterization of the waters before and after
changes in the system in order to establish whether the final properties of the
water fulfil the parameters required for its posterior use. The results obtained
show that the measurement system FBRM is an on-line sensor that is good
enough to be used as a control and prediction method in the water treatment
industries. Furthermore, the relations between the data obtained by the sensor
and the properties of the water after the depuration allow control of the outlet
water.
Keywords: flocculation, coagulation, FBRM control on-line, river water
treatment.
Keywords
flocculation, coagulation, FBRM control on-line, river water
treatment
Related Book
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