Modelling of stimulus response experiments in the feed channel of spiral-wound reverse osmosis membranes
References (15)
- et al.
Amer. J. Kidney Dis.
(1995) Desalination
(1995)- et al.
Desalination
(1999) Chem. Eng. Sci.
(1953)- et al.
Chem. Eng. Sci.
(1969) - et al.
Chem. Eng. Sci.
(1972) - et al.
Desalination
(1992)
Cited by (10)
Residence time distribution in RO channel
2021, DesalinationCitation Excerpt :By injecting a non-invasive tracer into the system of interest as an impulse or a step input, and recording the effluent concentration of the tracer, valuable information on the membrane system can be acquired. Application examples include monitoring of hydrodynamic conditions, concentration polarization, and fouling in membrane modules [7,8,9,10,11], explanation of silica scaling in RO operation with recirculation [12], assessment of membrane design parameters [13], study of evolution of interactions between solutes and membrane with wear [14], and investigation of membrane cleaning in dairy industry [15]. Recently, the concept of RTD has also been used to explain experimental data during RO flushing [3,16].
Prandtl model for concentration polarization and osmotic counter-effects in a 2-D membrane channel
2017, DesalinationCitation Excerpt :No information is needed on hydrodynamics and mechanisms of transport. This is the purpose of Roth et al. [42] who used the residence time distribution (RTD) method by analyzing in some spiral-wound membranes the response to a stimulus injection of tracer. The main drawback of this very simplified method is to ignore the local solute concentration in boundary layer which has a great influence on permeate flux via the phenomenon of concentration polarization.
Using tracer methods and experimental design approach for examination of hydrodynamic conditions in membrane separation modules
2012, Applied Radiation and IsotopesOptimal time-dependent operation of seawater reverse osmosis
2010, DesalinationCitation Excerpt :Hasson et al. [42] and Van Gauwbergen and Baeyens [38,41] showed that the residence time distribution in RO is in the order of several seconds. Roth et al. [39] modeled and measured the stimulus response time of an RO system to injection of a tracer. Their results show that the mean residence time of the tracer in the membrane is less than 1 min under a wide range of operating conditions.