Better understanding of the filtration characteristics in the flexible fibre filter module (3FM)

• Published in: Water science and technology Vol. 55; no. 1-2; pp. 77 - 83
• Main Authors: Lee, J J, Im, J H, BenAim, R, Kim, J R, Kim, Y J, Poo, K M, Kim, C W
• Format: Journal Article
• Language: English
• Published: England IWA Publishing 2007
• Subjects: Efficiency; Effluents; Filtration; Filtration - instrumentation; Filtration - methods; Inlets (waterways); Laboratories; Molecular Weight; Particle Size; Particle size distribution; Porosity; Pressure drop; Retention; Size distribution; Time Factors; Velocity; Viscosity; Water Purification - methods
• ISBN: 9781843395812; 1843395819
• ISSN: 0273-1223; 1996-9732
• DOI: 10.2166/wst.2007.049

This study is about the particle retention and filtration characteristics of fibre filter. Four laboratory scale fibre filters with different heights were used in parallel at various packing densities and filtration velocities. Of all of the operating parameters studied, filtration velocity had the most influence. Contrary to general theories, pressure drop increases slightly during the filtration in spite of the continuous retention of particles. This may have occurred because of large porosity of the packing (about 93%). This might be considered an advantage of the filter and something that makes it economic. The higher the filtration velocity, the larger the mass of particles retained in the filter. For filtration velocities of 20 and 40 m/h, particles smaller than 5 microm are retained as proven by the particle size distribution at the inlet and outlet.