期刊
WATER SCIENCE AND TECHNOLOGY
卷 67, 期 6, 页码 1294-1301出版社
IWA PUBLISHING
DOI: 10.2166/wst.2013.001
关键词
algae; chitosan; coagulation-flocculation; extracellular organic matter; harvesting; polyaluminum chloride
资金
- National Taiwan University of Science and Technology
We examined the effects of pre-oxidation using ozone (O-3) and a combination of O-3 and hydrogen peroxide (O-3/H2O2) on algae suspensions and their harvesting. Inactivation of algae cells, release of intracellular organic matter (IOM), mineralization of extracellular organic matter (EOM), and changes in molecular weight distribution of EOM were found after pre-oxidation. Enhanced separation efficiency of turbidity, dissolved organic carbon (DOC), protein, and polysaccharide using chitosan and polyaluminum chloride (PACl) was found after pre-oxidation, especially when algae cells were subject to O-3/H2O2. Chitosan showed higher efficiency than PACl. Judging from the remarkable increase in floc size, it was proposed that released IOM formed complexes with cationic chitosan and resulted in enhanced dual flocculation and facilitated algae separation.
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