막오염 현상 ( Membrane Fouling) - 멤브레인의 성능이 시간이 지남에따라 악화됨 . ... m = 수리역학 저항 , L/m R n = 비가역적 fouling, L/m R c = Cake 층으로 인한 저항 , L/m 4.1 Permeate flux 13 4. ... Fundamentals of Membrane Bioreactors 4. Parameters Influencing Membrane Performances 5.
fouling which is long-standing problem in SWRO process. ... evident increasingly that microscopic algae are a major cause of operational problems, for example, membrane
Introduction • 현재 RO 공정 이전에 유입수의 fouling 경향을 평가하기 위해 신뢰할 수 있고 유용한 지표를 개발하는데 중점을 두고 있음 • Fouling Indices ... Membrane surface morphology : higher local fluxes higher cake resistance 4. ... Results and discussion 4.5 Influence of spacers on CFS-MFI UF Fig.8 – Spiral wound membrane 5.
공정 중 가장 문제가 되는 것은 막의 오염(fouling) 현상이며 이에 대한 대책마련이 필요하다. ... 하는 경우가 많은 단점이 있다. - 직접 고형분의 회수가 불가능하며 최대 농축 한계 농도가 있어서 2차적으로 처리가 요구되기도 한다. - 공정 중 가장 문제가 되는 것은 막의 오염(fouling ... (sieve effect), (MF, UF, NF, Dialysis) Nonporous or dense membranes Ion-exchange membranes, eletrically
Direct feeding of raw feed water to membrane process caused serious fouling on membrane. ... Removal efficiency and fouling were more dependent on the material property of the membrane rather than ... On the other hand, pretreated feed by bioreactor before the membrane process remarkably reduced the fouling
According to the MFI value, the SPSf membrane has a fouling-retardant effect. ... The extent of fouling-repression is measured by membrane filtration index (MFI) value. ... This study is undertaken to investigate the major factor which causes a fouling phenomenon in membrane
The membrane fouling index for electrodialysis (EDMFI) was defined for the quantitative analysis of fouling ... potential as an analogy to the pressure-driven membrane process. fouling phenomena were compared in ... 이펄스 형태의 사각파 전원은 최적주파수에서 막오염현상을 현저하게 감소시킬 수 있었다. fouling phenomena of ion exchange membranes were reviewed
A non-coated polyamide NF membrane was significantly fouled by various foulants. ... By coating the polyamide NF membrane with aqueous PVA solution, fouling was reduced. ... There was severe fouling when using humic acid and adding bivalent cations.
In membrane pretreatment for seawater facing with algae blooms, membrane fouling was observed in submerged ... Organic fouling observed in submerged membrane filtration as a pretreatment for seawater desalination ... and membrane replacement.
The removal of soap resulted in decreasing the membrane fouling. ... The influence of membrane module of submerged and external type on membrane fouling was investigated. ... The effect of soap and protein on the membrane fouling in the external type membrane module was also
fouling were significant on membrane surface. ... The effect of cross-flow velocity and transmembrane pressure (TMP) on membrane fouling was observed from ... fouling.
AMPS membrane having a hydrophilic property was less fouled than PSf membrane. ... AMPS분리막은 소수성인 PSf막에 비하여 fouling이 감소하였다. ... dyes, proteins and amino acids, having same sign as the membrane surface.
The modified NF membranes showed significantly enhanced water flux and fouling resistance without a decrease ... on modified fouling index. ... modified membrane was examined.
Dense membrane by non-solvent DCM and porous membrane by pore forming agent PVP was prepared. ... for reducing fouling. ... 이온교환 용량이 높을수록 친수성이 증가하여 fouling을 감소시킬 수 있었다.
The PVAm-coated PA membranes showed somewhat fouling improvements and the fouling reduction was shown ... The effects of the fouling phenomena for these PVAm coated membranes were investigated using the model ... anionic exchange polymer, poly(vinyl amine)(PVAm), was coated onto polyamide (PA) reverse osmosis (RO) membranes
Hence, the phenomena of membrane fouling could be identified quantitatively by the evaluation of pore ... The membrane pores were severely fouled, and constricted to below 0.3 μm in the cases of bentonite and ... fouled.
membrane fouling. ... As HA concentration increased from 2 to 10 mg/L, the membrane fouling resistance after 180 mins' operation ... Therefore, HA concentration should affect on the membrane fouling at N2 back-flushing than water back-flushing
Water-back-flushing of 10 sec was performed per every period of 10 min to minimize membrane fouling. ... Resistance of membrane fouling (Rf) increased and J decreased as concentration of humic acid changed ... and membrane module inside.
adsorptive and hydrophilic properties of TiO2 nanoparticles for the HA can be involved in mitigating membrane ... between HA and TiO2 nanoparticles and increasing surface reactivity on nanoparticles, thereby reducing membrane ... fouling.