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....

The present study aimed to investigate the potential application of chitosan (CS) and its two derivatives, dialdehyde (DCT) carboxymethyl (CMC), as new flocculants in purification filter backwash water. main objective work was remove disadvantages inconveniences associated with using synthetic flocculants, mainly based on polyacrylamide, by biodegradable non-toxic biopolymer flocculants. deriva...

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...

Clogging problem has become one of the key problems restricting mining efficiency in-situ leaching uranium, and related research on law mechanism physical clogging not been reported. In order to identify understand complicated mechanism, experimental device is established simulate caused by suspended particles in uranium process, under different concentrations velocity flow are studied. The res...

This paper presents a technical overview of the capabilities and characteristics of technologies proposed for use as a means of providing copyright protection for digital information resources: a) Watermarks and fingerprints provide indication of ownership, and indication of the identity of a licensed user, respectively, by embedding security information in the digital object. This information ...

Peyer's patches (PPs), a major component of the gut-associated lymphoid tissue, serve as important antigen entry sites in mucosal immunity. PPs may play a role in the extension of ulcerative colitis (UC) into the terminal ileum. We sought to clarify the magnified endoscopic findings of the PPs in the terminal ileum of UC patients. Eighteen UC patients underwent magnifying chromoendoscopy before...

Maintaining effective solids capture and nitrification can determine the success or failure of a recirculating aquaculture system (RAS). Although solids capture and nitrification are often performed sequentially, they are united in floating-bead filters. The use of bead filters in a RAS began at the Dworshak National Fish Hatchery (Cooley 1979). More recently, a bead filter was developed and te...