Impact of algal organic matter released from Microcystis aeruginosa and Chlorella sp on the fouling of a ceramic microfiltration membrane

被引:43
作者
Zhang, Xiaolei [1 ]
Devanadera, Ma. Catriona E. [2 ]
Roddick, Felicity A. [1 ]
Fan, Linhua [1 ]
Dalida, Maria Lourdes P. [3 ]
机构
[1] RMIT Univ, Sch Civil Environm & Chem Engn, GPO Box 2476, Melbourne, Vic 3001, Australia
[2] Univ Philippines Los Banos, Coll Human Ecol, Dept Community & Environm Resource Planning, Los Banos, Philippines
[3] Univ Philippines Diliman, Dept Chem Engn, Quezon City 1101, Philippines
关键词
Algal organic matter; Ceramic membrane; Fouling; Microfiltration; Chlorella sp; Microcystis aeruginosa; WATER-TREATMENT; FLUORESCENCE; EOM; CYANOBACTERIUM; COAGULATION; SUBSTANCES; FILTRATION; COMPONENTS; PARAFAC;
D O I
10.1016/j.watres.2016.07.061
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Algal blooms lead to the secretion of algal organic matter (AOM) from different algal species into water treatment systems, and there is very limited information regarding the impact of AOM from different species on the fouling of ceramic microfiltration (MF) membranes. The impact of soluble AOM released from Microcystis aeruginosa and Chlorella sp. separately and together in feedwater on the fouling of a tubular ceramic microfiltration membrane (alumina, 0.1 mu m) was studied at lab scale. Multi-cycle MF tests operated in constant pressure mode showed that the AOM (3 mg DOC L-1) extracted from the cultures of the two algae in early log phase of growth (12 days) resulted in less flux decline compared with the AOM from stationary phase (35 days), due to the latter containing significantly greater amounts of high fouling potential components (protein and humic-like substances). The AOM released from Chlorella sp. at stationary phase led to considerably greater flux decline and irreversible fouling resistance compared with that from M. aeruginosa. The mixture of the AOM (1:1, 3 mg DOC L-1) from the two algal species showed more similar flux decline and irreversible fouling resistance to the AOM from M. aeruginosa than Chlorella sp. This was due to the characteristics of the AOM mixture being more similar to those for M. aeruginosa than Chlorella sp. The extent of the flux decline for the AOM mixture after conventional coagulation with aluminium chlorohydrate or alum was reduced by 70%. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:391 / 400
页数:10
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