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The Application of Immersion Combined Membrane Process for Drinking Water Treatment

Author: SunYiLan
Tutor: DengHuiPing
School: Tongji University
Course: Municipal Engineering
Keywords: Biological activated carbon Cycle for the amount of carbon Ammonia Membrane fouling Membrane filtration performance
CLC: TU991.2
Type: Master's thesis
Year: 2007
Downloads: 170
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Abstract


The subject by coagulation - biological activated carbon (BAC) - Ultrafiltration treatment effect and influence factors of slightly polluted water. Through experiments investigate the conditions of the operation of the combination process, the treatment effect, Ultrafiltration and control system biological effect. Through the analysis of the combined process of UV 254 and ammonia removal efficiency, to determine the system cycles change the amount of carbon 0.6g. Trials comparing with and without the effect of the system for the processing of the raw water in the case of biological role. Tests showed lower effluent turbidity biological effects; little biological effect removal of UV 254 ; biological role of ammonia removal improved significantly, biofilm mature system of ammonia to removal rate stabilized at 60%, the effluent ammonia values ??less than 0.5mg / L. The conclusion shows that the need for the existence of biological role. Continuous test to investigate the combined process of micro-polluted source water treatment effect in the cycle. The tests showed that the raw water influent water quality: turbidity 7.2 68NTU, UV 254 · 0.108-0.209 cm -1 , ammonia 0.41 ~ 4.45mg / L, effluent turbidity below 0.2NTU, the effluent UV 254 less than 0.1 cm -1 BAC successful culture effluent ammonia below 0.5 mg / L, the removal rate of up to 85% of the influent shock load capability. Investigate the combined process nitrogen transformation process, and analysis system for biological population growth and changes. The test showed that the ammonia removal efficiency has experienced rapid rising phase and the steady rise in the stage, nitrite removal of the first to decline and showed negative values ??to rise again stable, slow decline in nitrate removal rate. Explore the impact of various parameters on the system processing effects by changing the operating parameters in the combination process, analyze the the ultrafiltration characteristics change. Concluded: the effect of temperature change on ammonia removal greater impact on the temperature of 29 ° C to 31.1 C segment is more suitable for hanging on the pre-film; With the increased amount of aeration, the combined process of turbidity, the of COD Mn removal rate is slightly reduced UV 254 removal slightly increased, through the process of recovery after a short period of time to reduce and slow increase ammonia removal efficiency; coagulant amount of change little effect on the removal of turbidity and ammonia water UV 254 values ??rise slightly but the coagulant minus 0, effluent COD Mn increased significantly , and will result in the contamination of the membrane surface can not be cleaned. Increased after hanging film success the the system aeration rate can slow down the speed of membrane fouling; air-water backwash obvious effect on the performance of membrane filtration recovery. Investigate the changes in the combined process of ultrafiltration membrane performance analysis of membrane fouling, tests showed that exacerbate membrane fouling, the main reason for the increase of the resistance generated by the system to run the pre-film run late biological role. Membrane surface scanning electron microscope and energy dispersive analysis determined the the the membrane cleaning effect and surface contaminants nature. The test results show that the gas-water backwashing removes loose contaminants of most of the membrane surface; surface can not be air-water backwashing to remove dense layer is mainly composed of coagulant floc. The combined process of biological role is very obvious.

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CLC: > Industrial Technology > Building Science > Municipal Engineering > Water supply project ( on the Water Works ) > Clean Water ( water treatment )
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