逆洗對沈浸式薄膜過濾性能之影響

詹智勝

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逆洗對沈浸式薄膜過濾性能之影響

Effect of backwash on the performance of submerged membrane filtration

詹智勝 , Masters　　Advisor：黃國楨　　

繁體中文

沈浸式薄膜過濾；微過濾；薄膜阻塞；過濾性能；逆洗； submerged membrane filtration ； microfiltration ； filtration performance ； backwash

Abstract │ Reference (81) │ Times Cited (1) │ Altmetrics

Abstract 〈TOP〉

Parallel Abstract 〈TOP〉

The effects of backwash conditions, such as filtration time, backwash duration, backwash flux, on the filtration rate recovery and membrane blocking in submerged membrane filtration are studied. A ceramic membrane with a mean surface pore size of 5.6 μm is used to filter 5 μm PMMA particles. The experimental results show that the filtration resistances due to cake formation and membrane blocking play the major roles on the overall filtration resistance, but the latter one is always dominant. The filtration rate can be increased by increasing backwash flux and backwash duration because of the reduction of membrane internal fouling. In the first backwash cycle, the filtration rate can be recovered reaching about 39% and 56% of the original under the low and high backwash fluxes, respectively. It is because the particles blocked in the membrane pores can be washed out causing by shear stress and the cake formed on the membrane surface can be scoured out. It can be concluded that to operate under the conditions of long backwash duration and high backwash flux is optimum. In such conditions, the overall filtration efficiency can be increased as high as 40%. A higher backwash flux may make a 2-fold efficiency than a lower one would be under the same backwash duration.

Reference ( 81 ) 〈TOP〉

Ahn, K. H. and K. G. Song, “Treatment of Domestic Wastewater Using Microfiltration for Reuse of Wastewater”, Desalination., 126, 7(1999)
連結：
Bai, R., Leow, H.F., “Microfiltration of activated sludge wastewater-The effect of system operation parameters”, Separation and Purification Technology 29 (2), 189-198(2002)
連結：
Baker, J.S., Dudley, L.Y., “Biofouling in membrane systems - a review”, Desalination 118 (1-3), 81-90(1999)
連結：
Barker, D.J., Stuckey, D.C., “Modeling of soluble microbial products in anaerobic digestion: The effect of feed strength and composition”, Water Environment Research 73 (2), 173-184(2001)
連結：
Belfort, G.,J. M. Pimbley, A. Greiner and K. Y. Chung, “Diagnosis of Membrane Fouling Using Rotating Annular Filter. 1. Cell Culture Media”, J. Membrane Sci., 77, 1-22 (1993)
連結：

Times Cited (1) 〈TOP〉

黃怡勳(2009)。薄膜污塞線上光學偵測技術之評估。中原大學化學工程研究所學位論文。2009。1-88。

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