Performance characterization and steady-state modelling of spinning basket membrane module
TL;DR: In this paper, the performance of this module has been reported in the ultra-filtration operation and it is a special type of shear-enhanced device with inbuilt cleaning facility.
Abstract: Spinning basket membrane module is a special type of shear-enhanced device with inbuilt cleaning facility. In this article, the performance of this module has been reported in the ultrafiltration o...
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18 May 2021
TL;DR: In this paper, a review of different phenomenological and non-phenomenological models for permeate flux prediction in UF, and a comparison, between selected models, of the predictive capacity.
Abstract: In any membrane filtration, the prediction of permeate flux is critical to calculate the membrane surface required, which is an essential parameter for scaling-up, equipment sizing, and cost determination. For this reason, several models based on phenomenological or theoretical derivation (such as gel-polarization, osmotic pressure, resistance-in-series, and fouling models) and non-phenomenological models have been developed and widely used to describe the limiting phenomena as well as to predict the permeate flux. In general, the development of models or their modifications is done for a particular synthetic model solution and membrane system that shows a good capacity of prediction. However, in more complex matrices, such as fruit juices, those models might not have the same performance. In this context, the present work shows a review of different phenomenological and non-phenomenological models for permeate flux prediction in UF, and a comparison, between selected models, of the permeate flux predictive capacity. Selected models were tested with data from our previous work reported for three fruit juices (bergamot, kiwi, and pomegranate) processed in a cross-flow system for 10 h. The validation of each selected model’s capacity of prediction was performed through a robust statistical examination, including a residual analysis. The results obtained, within the statistically validated models, showed that phenomenological models present a high variability of prediction (values of R-square in the range of 75.91–99.78%), Mean Absolute Percentage Error (MAPE) in the range of 3.14–51.69, and Root Mean Square Error (RMSE) in the range of 0.22–2.01 among the investigated juices. The non-phenomenological models showed a great capacity to predict permeate flux with R-squares higher than 97% and lower MAPE (0.25–2.03) and RMSE (3.74–28.91). Even though the estimated parameters have no physical meaning and do not shed light into the fundamental mechanistic principles that govern these processes, these results suggest that non-phenomenological models are a useful tool from a practical point of view to predict the permeate flux, under defined operating conditions, in membrane separation processes. However, the phenomenological models are still a proper tool for scaling-up and for an understanding the UF process.
14 citations
TL;DR: In this article, the authors presented the modeling, simulation, and characterization studies of a dynamic shear-enhanced (DSE) filtration system with an inbuilt cleaning facility.
Abstract: Membrane-based low-cost recovery of nutritional and therapeutic proteins from wastewater is regarded as a leap towards sustainability. However, membranes are heavily fouled by proteins, and thus, frequent chemical or hydrodynamic cleaning is needed even in the advanced dynamic shear-enhanced (DSE) filtration devices. This article presents the modeling, simulation, and characterization studies of a DSE system, namely the ‘Spinning Basket membrane’ (SBM) module with an inbuilt cleaning facility. The device has been established to be specifically suitable for the recovery of proteins from synthetic wastewater. It can perpetually regenerate the flux with its simple and, moreover, online cleaning facility. A two-parameter transient model, purely based on an analytical approach, has been developed to simulate the device. Moderately low deviation (±12 %) of the simulated flux from the corresponding experimental data obtained from ultrafiltration of synthetic wastewater unambiguously validates the proposed model. The present modeling strategy demonstrates how a DSE filtration system with highly complex modes of mass and momentum transfer could be easily simulated.
1 citations
References
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TL;DR: In this article, the role of foulants in dairy effluent was analyzed and the two-step UF/NF process was not found advantageous as it did not improve the average permeate flux nor permeate quality, while increasing significantly the process energy consumption.
63 citations
TL;DR: In this paper, a water soluble chitosan derivative, Nsuccinyl CHITOSAN (NSCS), was blended with polysulfone (PSf) in three different compositions to fabricate PSf and NSCS blend membranes.
62 citations
"Performance characterization and st..." refers background in this paper
...s at a TMP of 300 kPa.([40]) Figure 5 also indicates that even at TMP=300 kPa, the SBMmodule is able to produce a flux of 6....
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TL;DR: In this article, a two-shaft dynamic filtration system with rotating membranes was investigated and it was shown that the differential speed between two adjacent disks has been uniform in the overlapping region and 51% higher than the azimuthal rim speed of a disk.
60 citations
"Performance characterization and st..." refers background in this paper
...In a standard cross-flow module, shear at the membrane surface can only be enhanced upon increasing the average feed velocity, which increases the pressure drop along the retentate side and invariably leads to a ‘non-optimal’ use of the total membrane surface area.[21] However, in a DSE module, the membrane shear rate can be enhanced simply upon changing the rotational and/or vibrational frequency of the corresponding moving accessory....
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TL;DR: In this paper, the authors report experimental data for a commercial VMF system (PallSep PS10) for protein recovery from a model biological feed stream containing 200 −500 ǫ g l−1 Saccharomyces cerevisae wet weight and 0.75 g l −1 bovine serum albumin (BSA).
59 citations
"Performance characterization and st..." refers background in this paper
...Accordingly, it has been suggested that either a rotating accessory, for example stirrer,([1,2]) rotating membrane([3,4]) or a vibrating surface([5,6]) must be an integral part of these devices....
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TL;DR: In this paper, the results from an experimental study of ultrasonically assisted ultrafiltration, varying ultrasonic frequencies, are presented, and the performances of sonochemical oxidation, membrane ultra-filtration and their combination were evaluated on wastewater samples.
Abstract: Water scarcity is an increasing world-wide concern due to the rapid growth of population along with industrialization and urbanization. Membrane ultrafiltration represents a promising and sustainable technology for handling this problem through water reuse. However, fouling is still a significant drawback that limits the expansion of membrane filtration use. Recent studies have shown that ultrasound provides an alternative technology for membrane fouling control able to enhance the effluent water quality in an environmentally benign manner. Nevertheless, the ultrasonic parameters affecting the efficiency of the US-enhanced cleaning are not completely well known. In this work results from an experimental study of ultrasonically assisted ultrafiltration, varying ultrasonic frequencies, are presented. The performances of sonochemical oxidation, membrane ultrafiltration and their combination were evaluated on wastewater samples. Results show that ultrasonic field can drastically reduce membrane fouling. It was found that lower frequency (35 kHz) slows down the fouling formation, but, on the other hand, higher frequency (130 kHz) improves the organic matter removal.
55 citations