Title: Coagulation optimization for low temperature and low turbidity source water using combined coagulants: a case study
Abstract: abstract abstract Coagulation optimization using coagulants of ferric chloride (FeCl3), polymer–polyaluminum ferric chloride (PAFC) and their combinations (FeCl3/PAFC) was evaluated by performing jar tests for treating source water with low temperature (<10°C) and low turbidity (1.5–8 NTU) i,n a typical North-China water treatment plant (WTP), Tanggu WTP. The results indicated that compared to single coagulant, the combined coagulants showed superior coagulation performance in terms of turbidity, UV254, CODMn, iron, and aluminum removal. The optimal dosage was determined as 20 mg/L using the combined PAFC/FeCl3 (3:1 by mass) and dosing PAFC with a 5–20 s interval followed by FeCl3. Scanning electron micrographs further showed that the coagulations combination can form a more compact structure that increases the settleability of the flocculation flocs. Keywords : Combined coagulantCoagulation optimizationLow turbidity and low temperature source water Acknowledgements This study was supported by funding from the Tianjin Science and Technology Commission under contracts of 06YFSYSF02600 and 043,115,111–5, Fundo para o Desenvolvimento das Ciências e da Tecnologia (FDCT), under grant No. 016/2011/A and Research Committee at University of Macau. The authors are very grateful to all the staffs of the Technical Department in the Tanggu Sino-French Water Supply Co. Ltd., who provided full support to this research.
Publication Year: 2012
Publication Date: 2012-08-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 21
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