Physical—chemical mechanisms in slow sand filters

Physical-chemical and biological particle removal mechanisms in slow sand filters were investigated at bench scale. Physical-chemical particle removal mechanisms were significant for particles throughout the size range analyzed (0.75-10 μm). Influent particle concentration and previously removed particles affected physical-chemical particle removal. Particle removal efficiency increased with particle accumulation within the filter bed.

[1]  John L. Cleasby,et al.  Slow Sand and Direct In‐line Filtration of a Surface Water , 1984 .

[2]  David W. Hendricks,et al.  Slow sand filtration: influences of selected process variables , 1985 .

[3]  Gary S. Logsdon,et al.  Slow Sand Filtration , 2001 .

[4]  A. Montiel,et al.  Paris Improves Its Drinking Water Treatment Plants , 1992 .

[5]  T. Eighmy,et al.  Evaluating Modifications to Slow Sand Filters , 1991 .

[6]  Desmond F. Lawler,et al.  Contact Filtration: Particle Size and Ripening , 1992 .

[7]  James K. Edzwald,et al.  Colloidal Stability of Particles in Lakes: Measurement and Significance , 1985 .

[8]  Dave Wheeler,et al.  Process aids for slow sand filtration , 1983 .

[9]  Philippe C. Baveye,et al.  Saturated Hydraulic Conductivity Reduction Caused by Aerobic Bacteria in Sand Columns , 1992 .

[10]  Chi Tien,et al.  Advances in deep bed filtration , 1979 .

[11]  Charles R. O'Melia,et al.  Water and waste water filtration. Concepts and applications , 1971 .

[12]  Peter F. Schuler,et al.  Slow sand and diatomaceous earth filtration of cysts and other particulates , 1991 .

[13]  David W. Hendricks,et al.  Removing Giardia Cysts With Slow Sand Filtration , 1985 .

[14]  Barry J Lloyd,et al.  The construction of a sand profile sampler: Its use in the study of the Vorticella populations and the general interstitial microfauna of slow sand filters , 1973 .

[15]  M. Elimelech,et al.  Dynamics of colloid deposition in porous media: Modeling the role of retained particles , 1993 .

[16]  Jerry E. Ongerth,et al.  Removing Giardia and Cryptosporidium by Slow Sand Filtration , 1993 .