Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 626, Issue -, Pages 264-273Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2018.01.074
Keywords
Harmful algal blooms; Algal organic matter; Bioploymer; Central composite design; Secondary pollution
Categories
Funding
- National Key Research and Development Program of China [2016YFC0401709]
- National Science Funds for Creative Research Groups of China [51421006]
- National Natural Science Funds for Excellent Young Scholar [51722902]
- Key Program of National Natural Science Foundation of China [91647206]
- Outstanding Youth Fund of Natural Science Foundation of Jiangsu, China [BK20160038]
- National Water Pollution Control and Treatment Science and Technology Major Project [2017ZX07204003]
- PAPD
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The objective of this study was to determine the influence of Tanfloc on Microcystis aeruginosa cell integrity, microcystin-LR (MC-LR), and proteins during flocculation and floc storage. The effects of Tanfloc addition, stirring, and floc storage time were considered tominimize cell damage and the release of MC-LR and proteins. Optimal flocculation conditions (Tanfloc dosage 10.42 mg L-1, rapid agitation for 0.36 min at 568.88 rpm and slow agitation for 14.14min at 12.1 rpm) were obtained using the response surface methodology. Up to 98.9% of the M. aeruginosa cellswere removed intact at low Tanfloc dosage. During floc storage, Tanfloc initially protected the cells. After 8 d, large-scale cell lysis occurred because Tanfloc had substantially decomposed. Nevertheless, Tanfloc also extended the extracellular MC-LR and protein release time to 8 d. This delay ensured adequate time to decontaminate sludge containing the algae, thereby reducing the risk of secondary pollution. In addition, the low cost of Tanfloc facilitates its widespread application in the management of harmful algal blooms. (c) 2018 Elsevier B.V. All rights reserved.
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