As a consequence of the increase in reverse osmosis (RO) desalination plants, number discarded RO modules for 2020 was estimated to be 14.8 million annually. Currently, these are disposed nearby landfills generating high volumes waste. In order extend their useful life, this research study, we propose recycling and reusing internal components modules, membranes spacers, membrane engineering dis...

In this study, process enhancements achieved by the use of 3D printed feed spacers based on triply periodic minimal surfaces (TPMS) were comparatively assessed using two most common membrane distillation (MD) configurations: air gap (AGMD) and direct contact (DCMD). The MD performance was impact spacer design (TPMS vs. commercial spacer) flux channel pressure drop, their consequent levelized co...

In the direct contact membrane distillation (DCMD) system, temperature polarization due to boundary layer formation limits system performance. This study presents experimental results and heat transfer analysis of a DCMD module coupled with salinity gradient solar pond (SGSP) under three different flow channel configurations. first case, feed permeate channels were both empty, while in next two...

the surface properties of tio2-pvdf nanocomposite membranes were investigated by incorporating different chemically modified tio2 nanoparticles into the poly (vinylidene fluoride) (pvdf) matrix. the nanocomposite membranes were prepared via dual coagulation bath diffusion and the induced phase inversion method. the membrane surface morphologies were investigated by using sem and afm and related...

Abstract In this study, an electrohydrodynamic atomization or electrospraying technique is used for the uniform deposition of carbon nanotubes (CNT) on a commercially available PTFE membrane and employed Membrane Distillation (MD) process. Modified PTFE-CNT was characterized water contact angle, liquid entry pressure (LEP), pore size distribution, surface morphology. The electrospray coating CN...

High liquid entry pressure (LEP) is one of the desired characteristics of a membrane distillation (MD) membrane. Maintaining LEP above operating feed pressure conditions is critical to prevent permeate quality worsening by saline feed liquid passage through the membrane. Air gap membrane distillation experiments under controlled salinity and temperature operating conditions indicate that in add...

This study aims to investigate the applicability of vacuum membrane distillation for concentrating aqueous lithium bromide solution, and to analyze the feasibility of applying vacuum membrane distillation process to the absorption refrigeration system. Hydrophobic polyvinylidene fluoride (PVDF) was adopted as the membrane material, and was made into hollow fiber membrane module. Commercial aque...

Electrospun membranes are gaining interest for use in membrane distillation (MD) due to their high porosity and interconnected pore structure; however, they are still susceptible to wetting during MD operation because of their relatively low liquid entry pressure (LEP). In this study, post-treatment had been applied to improve the LEP, as well as its permeation and salt rejection efficiency. Th...

Polytetrafluoroethylene (PTFE) nanofiber membranes with novel crosshatched structures are developed and applied to both water desalination by direct contact membrane distillation (MD) CO2 separation gas absorption. Crosshatched produced from a PTFE-poly(ethylene oxide)(PEO) emulsion depositing alternating layers of aligned fibers oriented in perpendicular directions. This is followed sintering ...