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- Title
Algae removal efficiencies of AS/PDMDAAC coagulants.
- Authors
Xiaolei Zhao; Yuejun Zhang; Xiaoxiao Li; Cheng Liu; Lingling Zhu
- Abstract
This research investigated the use of composite coagulants for enhanced coagulation of algae-containing water from Taihu Lake in China. The composite coagulants comprised aluminum sulfate (AS) and poly dimethyl diallyl ammonium chloride (PDMDAAC) of different intrinsic viscosity values (0.55-3.99 dL/g) and different mass percentages (5-20%) in formulation. For algae-containing water with a temperature of 29-30°C and algal content of 3.52 × 104 cells/mL, algae removal rates of 81.11% and 85.89-90.53%, respectively, were realized using AS at a dose of 7.78 mg/L and AS/PDMDAAC at formulations of 0.55/5-3.99/20% and doses of 6.55-3.54 mg/L when 2-ntu residual turbidity of effluent water after sedimentation was required. The removal rates of chemical oxygen demand and ammonia using AS/PDMDAAC in algae-containing water were higher than those using AS alone. Composite coagulants could reduce required doses and decrease algal content in effluent water when 1-ntu residual turbidity is required. When identical doses were used, 1.53/10% AS/PDMDAAC outperformed AS combined with prechlorination.
- Subjects
CHINA; ALGAE; COAGULANTS; CHLORINATION; ALUMINUM sulfate
- Publication
Journal: American Water Works Association, 2010, Vol 102, Issue 7, p119
- ISSN
0003-150X
- Publication type
Article
- DOI
10.1002/j.1551-8833.2010.tb10154.x