The impact of differing cell and algogenic organic matter (AOM) characteristics on the coagulation and flotation of algae

被引：304

作者：

Henderson, Rita K. ^{[1
]}

Parsons, Simon A. ^{[1
]}

Jefferson, Bruce ^{[1
]}

机构：

[1] Cranfield Univ, Ctr Water Sci, Cranfield MK43 0AL, Beds, England

来源：

WATER RESEARCH | 2010年 / 44卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

Algae; AOM; Coagulation; DAF; Organic matter; DISSOLVED AIR FLOTATION; FLOCCULATION; SEDIMENTATION; ALUMINUM; REMOVAL;

D O I：

10.1016/j.watres.2010.04.016

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The aim of this study was to compare the coagulation and flotation of different algae species with varying morphology and algogenic organic matter (AOM) composition in order to link physical and chemical algae characteristics to treatment. Microcystis aeruginosa (cyanobacteria), Chlorella vulgaris (green algae), Asterionella formosa and Melosira sp. (diatoms) were treated by coagulation with aluminium sulphate and flotation. The AOM was extracted and treated separately. Analyses included cell counts, dissolved organic carbon, aluminium residual and zeta potential. Removal efficiencies in the range 94-99% were obtained for each species. Cells, AOM and aluminium were concurrently removed at a coagulant dose that was related on a log-log basis to both cell surface area and total charge density, although the relationship was much stronger for the latter. This was attributed to a significant proportion of the coagulant demand being generated by the AOM. The implications of such findings are that relatively simple charge measurements can be used to understand and control coagulation and flotation of algae. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3617 / 3624

页数：8

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