KMnO4 pre-oxidation for Microcystis aeruginosa removal by a low dosage of flocculant

The effects of the flocculant composed of autoclaved fly-ash brick and chitosan for algae Microcystis aeruginosa removal were investigated. The results showed that when 1mL flocculant was added in 25mL algae suspension, which initial density was 106cells/mL, the removal rate of algae reached 88.4%....

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Bibliographic Details
Published in:Ecological engineering 2015-08, Vol.81, p.298-300
Main Authors: Wang, Hong-Qiang, Mao, Tian-Guang, Xi, Bei-Dou, Zhang, Lie-Yu, Zhou, Qiao-Hong
Format: Article
Language:English
Subjects:
Algae
Autoclaved brick powder
Brick
Chitosan
Coagulation
Density
Dosage
Ecology
Flocculant
KMnO4
Microcystis
Microcystis aeruginosa
Reaction time
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Summary:The effects of the flocculant composed of autoclaved fly-ash brick and chitosan for algae Microcystis aeruginosa removal were investigated. The results showed that when 1mL flocculant was added in 25mL algae suspension, which initial density was 106cells/mL, the removal rate of algae reached 88.4%. In order to enhance the removal efficiency, pre-oxidation with KMnO4 was studied. The results indicated that it could improve algae coagulation removal by 9.44% when it was pre-oxidized by KMnO4 with the concentration of 0.9mg/L. The cells of M. aeruginosa sunk quickly, thus the algal cells were removed completely. In conclusion, the combined flocculant owns the advantages of low concentration, short reaction time, and could be employed for algae control.
ISSN:0925-8574
1872-6992
DOI:10.1016/j.ecoleng.2015.04.015