under investigation. The early models to solve Navier-Stokes equation for a laminar flow in porous tube were proposed in Berman [1] and Yuan [2] and extended by Bernales [3]. Berman [1] presented a solution to the two-dimensional model in laminar flow in channels with uniform wall suction. This study was extended to cylindrical coordinates to investigate suction as well as injection in flow alo...

This study aims to evaluate the application of ultrafiltration technology for separation particles and oil droplets recovery ammonia from hydrothermal liquefaction (HTL) wastewater. Real HTL wastewater municipal sewage sludge was used in this study. Experiments were carried out using a submerged polyethersulfone membrane with molecular weight cutoff 100 kDa combination air stripping addition ac...

A bioreactor equipped with hollow fiber microfiltration membranes was applied for wastewater treatment. Removal of chemical oxygen demand (COD) and biochemical oxygen demand (BOD5) was investigated. The experimental setup consisted of influent and effluent tanks, and membrane modules using Polyvinyl Di–Fluoride (PVDF) hollow fibers. The operation program included suction and backwash...

[1] Alderson, J. C., & Wall, D. (1993). Does washback exist? Applied Linguistics, 14, 115–129.
 [2] Ali, M. M., Hamid, O. (2020). Teaching English to the test: Why negative exist within secondary education in Bangladesh? Language Assessment Quarterly, 17(2), 129-146.
 [3] Cheng, L., Curtis, A. (2004). Washback or backwash: A review of impact testing on teaching and learning. In L....