Drinking water production by ultrafiltration of Songhuajiang River
with PAC adsorption |
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Authors: | XIA Sheng-ji LIU Ya-nan LI Xing and YAO Juan-juan |
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Institution: | 1. State Key laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China 2. School of Environmental Science and Engineering, Dong Hua University,Shanghai 201620,China 3. School of Architecture and Civil Engineering, Beijing University of Technology, Bejing 100083, China |
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Abstract: | In recent years, membrane ultrafiltration (UF) of surface water for drinking water treatment has become a more attractive technology worldwide as a possible alternative treatment to conventional clarification. To evaluate the performance of ultrafiltration membranes for treatment of surface water in North China, a 48-m2 low pressure hollow fiber membrane ultrafiltration pilot plant was constructed. Ultrafiltration was operated in cross-flow and with powdered activated carbon (PAC) adsorption. Turbidity was almost completely removed to less than 0.2 NTU (below Chinese standard 1 NTU). It was found that PAC addition enhanced organic matter removal. The combined process of PAC/UF allowed to 41% removal of CODMn, 46% removal of DOC and 57% decrease in UV254 absorbance. The elimination of particles, from average 12000/ml in the raw water to approximately 15/ml in the permeated, was observed. When PAC concentration was below 30 mg/L, backwashing could recovery the membrane flux with backwash interval/backwashing duration of 1/30. |
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Keywords: | surface water drinking water treatment ultrafiltration powdered activated carbon adsorption River ultrafiltration production water duration backwashing recovery flux interval concentration average elimination particles decrease absorbance CODMn combined process addition organic matter |
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