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Pilot-scale Experiment on Ultrafiltration Membrane for Process Transformation of Waterworks

Wang Qi-shan

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Abstract

The combined process of flocculation,sedimentation and ultrafiltration membrane(process 1) and the combined process of flocculation,sedimentation,sand filtration and ultrafiltration membrane(process 2) were used to treat Luan River water.The treatment efficiency of the two combined processes in different water quality periods was investigated.The results showed that turbidity could be effectively removed by the two combined processes,and the effluent turbidity was all less than 0.1 NTU.Compared with the process 1,the process 2 has better removal rates of CODMn,UV254,NH3-N and TOC,a more stable effluent quality,a stronger shock load resistance and a higher membrane flux and permeability.The removal of DOM and UV254 in the two processes was mainly reflected in the molecular weight range of more than 30 ku.

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What this paper is about

The combined process of flocculation,sedimentation and ultrafiltration membrane(process 1) and the combined process of flocculation,sedimentation,sand filtration and ultrafiltration membrane(process 2) were used to treat Luan River water.The treatment efficiency of the two combined processes in different water quality periods was investigated.The results showed that turbidity could be effectively removed by the two combined processes,and the effluent turbidity was all less than 0.1 NTU.Compared with the process 1,the process 2 has better removal rates of CODMn,UV254,NH3-N and TOC,a more stable effluent quality,a stronger shock load resistance and a higher membrane flux and permeability.The removal of DOM and UV254 in the two processes was mainly reflected in the molecular weight range of more than 30 ku.

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Available abstract

The combined process of flocculation,sedimentation and ultrafiltration membrane(process 1) and the combined process of flocculation,sedimentation,sand filtration and ultrafiltration membrane(process 2) were used to treat Luan River water.The treatment efficiency of the two combined processes in different water quality periods was investigated.The results showed that turbidity could be effectively removed by the two combined processes,and the effluent turbidity was all less than 0.1 NTU.Compared with the process 1,the process 2 has better removal rates of CODMn,UV254,NH3-N and TOC,a more stable effluent quality,a stronger shock load resistance and a higher membrane flux and permeability.The removal of DOM and UV254 in the two processes was mainly reflected in the molecular weight range of more than 30 ku.

Key concepts: Turbidity, Flocculation, Ultrafiltration (renal), Effluent, Sedimentation, Filtration (mathematics), Environmental science, Environmental engineering

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