Modeling, simulation, and characterization of spinning basket membrane module in recovery of proteins from synthetic wastewater
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.
Citations
More filters
TL;DR: In this article , the effects of simple wire-type turbulence promoters on a specific class of DSE membrane modules, the spinning basket filtration units, were investigated, and the results indicated that the application of turbulence promoters in DSE modules to maximally increase the protein recovery from wastewater even at concentrations where the standard cross-flow systems are apprehended to be non-functional.
Abstract: The expected growth of membrane technology in protein recovery from wastewater is largely impeded by operational non-idealities like concentration polarization and membrane fouling. Two independent concepts, namely, the Dynamic Shear Enhanced (DSE) filtration and turbulence promoters were introduced decades earlier to remediate the problems. However, no systematic effort was undertaken to explore the synergy of the two process intensification schemes. In this study, we have investigated the effects of simple wire-type turbulence promoter on a specific class of DSE membrane modules, the spinning basket filtration units. The maximum flux improvement with synthetic wastewater (i.e., Bovine Serum Albumin (BSA)-water solution) was 445%, whereas for the real dairy effluent, the respective enhancement levelled off at 204%. The lower level of flux enhancement for real wastewater may be attributed to the severe fouling caused by the casein micelle. The increase of power consumption in all promoter-fitted configurations was limited to 9% only. Thus, turbulence promoter-integrated spinning basket group of membrane modules are confirmed to be much superior relative to other devices in protein recovery from wastewater. Our results are also supported by corroborating computational fluid dynamic (CFD) simulations of elevated shear and high turbulent kinetic energy dissipation rates for all promoter-fitted configurations. The present outcomes clearly recommend the application of turbulence promoters in DSE modules to maximally increase the protein recovery from wastewater even at concentrations where the standard cross-flow systems are apprehended to be non-functional.
3 citations
References
More filters
TL;DR: In this article, the behavior of laminar and turbulent boundary layers on a moving continuous cylindrical surface is investigated by the integral method, based on assumed velocity profiles that satisfy the appropriate boundary conditions.
Abstract: The behavior of laminar and turbulent boundary layers on a moving continuous cylindrical surface is investigated by the integral method, based on assumed velocity profiles that satisfy the appropriate boundary conditions. Equations for the characteristic boundary-layer parameters are presented for both the laminar and turbulent boundary layers, and comparison is made with the boundary-layer behavior over a cylindrical surface of finite length. The analysis for the laminar boundary layer with a logarithmic velocity profile leads to satisfactory results. The turbulent boundary-layer behavior on continuous cylindrical surfaces, and cylindrical surfaces of finite length, can best be investigated experimentally.
1,676 citations
TL;DR: This review begins by briefly summarizing the history of direct search methods and considering the special properties of problems for which they are well suited, then turns to a broad class of methods for which the underlying principles allow general-ization to handle bound constraints and linear constraints.
Abstract: Direct search methods are best known as unconstrained optimization techniques that do not explicitly use derivatives. Direct search methods were formally proposed and widely applied in the 1960s but fell out of favor with the mathematical optimization community by the early 1970s because they lacked coherent mathematical analysis. Nonetheless, users remained loyal to these methods, most of which were easy to program, some of which were reliable. In the past fifteen years, these methods have seen a revival due, in part, to the appearance of mathematical analysis, as well as to interest in parallel and distributed com- puting. This review begins by briefly summarizing the history of direct search methods and considering the special properties of problems for which they are well suited. Our focus then turns to a broad class of methods for which we provide a unifying framework that lends itself to a variety of convergence results. The underlying principles allow general- ization to handle bound constraints and linear constraints. We also discuss extensions to problems with nonlinear constraints.
1,652 citations
TL;DR: In this article, a review summarises the known facts about the fouling processes and cleaning procedures and details of the most successful physical and chemical cleaning combinations for one-stage and multi-stage UF membrane cleaning.
Abstract: Ultrafiltration (UF) is one of the best options for both one-stage and as part of multi-stage water and wastewater purification. This review summarises the known facts about the fouling processes and cleaning procedures and details of the most successful physical and chemical cleaning combinations. The optimum cleaning is closely linked to the nature of the fouling. Precise knowledge of both the fouling type (organic, inorganic, or biological) and the fouling mechanism (gel formation, adsorption, deposition, pore blockage, or cake formation) is the key to success in UF membrane cleaning.
588 citations
TL;DR: In this article, a review of the literature on concentration polarization in ultrafiltration and reverse osmosis is presented, with specific models such as surface renewal, and experimental methods such as laser-based refractometry, for quantification of the problem.
474 citations
TL;DR: In this article, a comprehensive overview of the wide range of techniques used in the control of fouling in both MF and UF membranes is presented, as well as the amount of research that has gone into the various techniques used and the results achieved after experimental work.
Abstract: Membrane‐based processes are very susceptible to flux decline due to concentration polarization and fouling problems and the concept of fouling control via process optimization, membrane surface modification, and cleaning have been the focus of research in wastewater and water treatment. MF and UF membranes are utilized in many areas of industry. The main sector of application includes water and wastewater. There has been emphasis on the various methods used to reduce and, where possible, eliminate fouling. This review is a comprehensive insight into the wide range of techniques used in the control of fouling in both MF and UF membranes. It also addresses the amount of research that has gone into the various techniques used and the results achieved after experimental work.
421 citations