By using the optimized membrane cleaning methods, the cleaning efficiency was significantly improved, which can cause higher membrane filtration capacity and efficiency.
Furthermore, the as-prepared PSU/TiO2-5 mexhibitedxhimprovedmproved filtration efficiency (99.997%) and pressure drop (45.3 Pa) compared with pristine PSU membrane, which would make them a promising media for fine particle filtration, and a new insight was also provided into the design and development of high performance filter medium based on hierarchical structured fibers.
By simply varying the composition of precursor solutions and layer-by-layer assisted stacking structure, individual fibers within the medium can conformally be endowed with non-circular cross section, or rough surface to form a skeletal frame-worked membrane with complimentary filtration efficiency (99.989%) and pressure drop (117 Pa) for 300 500 nm NaCl aerosol particles.
The composite membrane demonstrated a high filtration efficiency of 98.989% with low pressure drop as 1279 Pa and 3.591 kPa−1 quality index.
The membranes showed very high filtration efficiency on separating 50 nm Latex microbeads from water suspensions.
The resultant membranes achieve a high filtration efficiency of 99.950%, low air resistance of 55.0 Pa, and robust durability, providing a guidance for the design of electret air filtration materials used in haze environment.
The efficiency of membrane filtration is limited by the presence of concentration polarization (CP) and membrane fouling.
Configuration optimization of a cylindrical 37-channel porous inorganic membrane tube was studied by increasing membrane filtration area and increasing permeation efficiency of inner channels.
A numerical investigation is carried out to examine the effect of a new baffle design in a membrane tube on the hydrodynamics and filtration efficiency.
Many conventional methods for the removal of heavy metals from contaminated water such as precipitation, flocculation, solvent extraction, ion exchange, reverse osmosis and membrane filtration are limited by poor removal efficiencies and high cost (Pavasant et al. 2006; Arief et al. 2008).
