Monitoring of Algal Flocculation Using Polarized Light Scattering

Abstract

Abstract: Adding proper amount of flocculants and coagulants into water can settle algal flocculation and remove algal
bloom. Water body in scene is much complex and there are many factors affecting the flocculation effects.
It is beneficial to improve the treatment effect to monitor the algae flocculation process in situ.
Microcysts aeruginosa was used as a sample in this work to form flocculant suspension by adding different
concentrations of polyaluminium chloride and kaolin, and then the polarization parameters of the different
flocs suspension were measured by polarized light scattering technique. The results show that the polarization
parameters can be used to characterize the flocculation processes affected by the dosage of flocculants and
coagulants, which shows the potential of the proposed polarized light scattering technique to describe the
algal flocculation process. It is indicated that the method provides an in-situ non-contact, unmarked and
rapid monitoring tool for algal flocculation process research, algal blooms governance and monitoring,
contaminated water treatment, pharmaceutical development, etc.

Key words: algae, flocculation, polarized light scattering, monitoring

CLC Number:

TP79

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