Title: The Study of Optimal Coagulants for Water Treatment Process of Metropolitan Waterworks Authority
Abstract:This research was conducted to investigate the optimal coagulants for water treatment process in raw water with low turbidity (10 – 30 NTU), normal turbidity (30 – 50 NTU) and high turbidity (120 – 15...This research was conducted to investigate the optimal coagulants for water treatment process in raw water with low turbidity (10 – 30 NTU), normal turbidity (30 – 50 NTU) and high turbidity (120 – 150 NTU) using alum, polyaluminium chloride (PACl), polyaluminium chloride high basicity (PACl HB) and aluminium chlorohydrate (ACH) as coagulants with jar test method. Variation of alkalinity of raw water were 10, 60 and 100 mg/L as CaCO 3 . It was found that all coagulants could remove turbidity from raw water below 4 NTU to meet water quality standards of Metropolitan Waterworks Authority. At 10 – 30 NTU of raw water turbidity, the optimal coagulant was 8 mg/L of polyaluminium chloride with alkalinity 100 mg/L as CaCO 3 . The turbidity removal efficiency was 83.02%. The cost of coagulant was 0.096 bath/cubic meter. At 30 – 50 NTU of raw water turbidity, the optimal coagulant was 6 mg/L of polyaluminium chloride high basicity with alkalinity 100 mg/L as CaCO 3 . The turbidity removal efficiency was 92.16%. The cost of coagulant was 0.137 bath/cubic meter. At 120 – 150 NTU of raw water turbidity, the optimal coagulant was 20 mg/L of polyaluminium chloride with alkalinity 100 mg/L as CaCO 3 . The turbidity removal efficiency was 97.04%. The cost of coagulant was 0.240 bath/cubic meter. Keywords : coagulant, turbidity, water treatment processRead More
Publication Year: 2018
Publication Date: 2018-01-23
Language: en
Type: article
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