Hollow fibre membrane contactors (HFMC) have emerged as a promising technology for nitrogen-recovery that can be implemented in wastewater treatment plants (WWTPs) to promote circular economy. In this process, hydrophobic allows the transference of free-ammonia across hollow fibres. During its operation, ammonium concentration decreases, and real-time measurements would great value process moni...

Polyvinylidene fluoride/polyvinylpyrrolidone (PVDF/PVP) hollow fiber membranes were fabricated by dry-jet wet-spinning process. The correlated effects of the air gap length and PVP concentration ((1) the air gap length effect at the low and high PVP concentration in the dope solutions, as well as (2) the effect of the PVP concentration at the same air gap length) on the cross-section structure ...

Keratin micro-tubes were obtained by heating medullated keratin fibres to temperatures above 230°C under nitrogen atmosphere, when, as documented by microscopy, the cortex (the core of the fibre) melts from the medulla outwards, followed by pyrolysis of the material through the remaining solid cuticle (shell) layer. The resulted hollow tubes from fibres void of cortical material keep the extern...

Abstract In this work, hollow fibre ultrafiltration (UF) membrane operating under gravitational force were used to treat Escherichia coli bloomed water as well contaminated surface water. The biofouling propensity of the UF was investigated. results showed that after single filtration using gravitational-driven unit, E. cells accumulated on and gave fair rejection 86.35–90.22% for initial conce...

Axisymmetric vibration of an infinite Pyrocomposite circular hollow cylinder made of inner and outer pyroelectric layer of 6mm-class bonded together by a Linear Elastic Material with Voids (LEMV) layer is studied. The exact frequency equation is obtained for the traction free surfaces with continuity condition at the interfaces. Numerical results in the form of data and dispersion curves for th...