Effect of O3 and O3/H2O2 on algae harvesting using chitosan

被引：8
|
作者：
Pranowo, R. [1 ]
Lee, D. J. [1 ]
Liu, J. C. [1 ]
Chang, J. S. [2 ]
机构：
[1] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 106, Taiwan
[2] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan
来源：
WATER SCIENCE AND TECHNOLOGY | 2013年 / 67卷 / 06期
关键词：
algae; chitosan; coagulation-flocculation; extracellular organic matter; harvesting; polyaluminum chloride; NATURAL ORGANIC-MATTER; REMOVAL; OZONE; COAGULATION; FLOTATION; OXIDATION;
D O I：
10.2166/wst.2013.001
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
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.
引用
收藏
页码：1294 / 1301
页数：8
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