Membrane performance in treating chemical industrial wastewater using a submerged membrane bioreactor = 침지형 생물막공법을 이용한 화학공장폐수처리에서의 막의 거동

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This study presents membrane performance results from a lab-size membrane bioreactor system fed with industrial wastewater of a chemical company. Thiswastewater varied in quality and was of high strength. The membrane bioreactor was operated for 65 days. Cleaning of membrane was performed twice during operation period with bleach. After operation, the batch test was performed to find the more specific relationship between the permeate flux and transmembrane pressure and to determine the influence of airflow rate on membrane performance. The permeate flux decreased rapidly in 12 hr hydraulic detention time resulting in high loading rate and stress to the membrane, while a slower decrease was observed for low hydraulic detention time(3 days). he flux increased linearly with the transmembrane pressure, before reaching a maximum. After the point of the critical transmembrane pressure was arrived at which the flux remained constant, the flux was independent of the transmembrane pressure. This relationship was modified using the resistance-in-series model. A linear relationship between the critical transmembrane pressure and the airflow rate was observed. The high temperature was favourable to the membrane performance. The quality of sludge affected the permeate flux, this relationship was determined by analysing biomass concentration and capillary suction time (CST). A linear relationship between the logarithmic mixed liquor suspended solid (MLSS) and the permeability was found and as CST increased, the flux decreased linearly. In conclusion, the viscosity of suspended solid was a main parameter determining the membrane performance.
Advisors
Shin, Hang-Sikresearcher신항식researcher
Description
한국과학기술원 : 토목공학과,
Publisher
한국과학기술원
Issue Date
2000
Identifier
158337/325007 / 000963287
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 토목공학과, 2000.2, [ iii, 46 p. ]

Keywords

Transme mbrane pressure; Permeate flux; Membrane performance; Submerged membrane bioreactor; Permeability; 투과도; 투과압력; 투과유량; 막의 거동; 침지형 생물막공법

URI
http://hdl.handle.net/10203/31003
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=158337&flag=dissertation
Appears in Collection
CE-Theses_Master(석사논문)
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