RRC ID 21781
Author Takaara T, Sano D, Konno H, Omura T.
Title Cellular proteins of Microcystis aeruginosa inhibiting coagulation with polyaluminum chloride.
Journal Water Res
Abstract Cyanobacterial growth in semi-closed water areas such as reservoirs brings about a coagulation inhibition in a drinking water treatment system, but the inhibitory substances and mechanisms involved have yet to be elucidated. In this study, proteins having a high affinity with polyaluminum chloride (PACl) were isolated from organic substances produced by Microcystis aeruginosa with the affinity chromatography technique. Both extracellular organic matter (EOM) and cellular organic matter (COM) disturbed the flocculation of suspended kaolin with PACl, but it was likely that nonproteinous substances in EOM cause the reduction of coagulation effciency. In contrast, proteins in COM were obtained as possible inhibitory substances for the coagulation with PACl. These proteins could consume PACl in the coagulation process due to the formation of chelate complexes between these inhibitory proteins and the coagulant. The consumption of PACl by cyanobacterial proteins could be one of the important causes of the increase in coagulant demand.
Volume 41(8)
Pages 1653-8
Published 2007-4-1
DOI 10.1016/j.watres.2007.01.035
PII S0043-1354(07)00073-5
PMID 17353025
MeSH Aluminum Hydroxide / chemistry* Bacterial Proteins / chemistry* Flocculation Microcystis* Water Purification
IF 9.13
Times Cited 62
Algae NIES-91