Zobrazeno 1 - 10
of 59
pro vyhledávání: '"RICHARD I. DICK"'
Autor:
Richard I. Dick
Publikováno v:
Proceedings of the Water Environment Federation. 2001:267-274
Publikováno v:
Journal of Environmental Engineering. 126:1153-1157
While successful in removing turbidity and pathogens from drinking water, slow sand filters require ripening periods at the beginning of each filter run. The premise of this research was that it should be possible to enhance the ripening of slow sand
Autor:
Richard I. Dick, Monroe L. Weber-Shirk
Publikováno v:
Water Research. 33:631-638
Bacterivory previously was shown to be responsible for significant removal of bacteria in slow sand filters. This research was designed to identify the responsible bacterivores and to evaluate their ability to remove a significant fraction of bacteri
Autor:
Monroe L. Weber-Shirk, Richard I. Dick
Publikováno v:
Journal - American Water Works Association. 89:72-83
Particle and E. coli removal mechanisms in slow sand filters were investigated at bench scale. Sodium azide (an inhibitor of oxidative phosphorylation) caused appreciable reduction in particle and E. coli removal; this indicated biological removal me
Autor:
Monroe L. Weber-Shirk, Richard I. Dick
Publikováno v:
Journal - American Water Works Association. 89:87-100
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). Influen
Autor:
Richard I. Dick
Publikováno v:
Journal of Environmental Engineering. 129:485-487
A model for a nitrifying suspended-growth reactor incorporating intraparticle diffusional limitation
Autor:
N.A.K. Bakti, Richard I. Dick
Publikováno v:
Water Research. 26:1681-1690
A mathematical model for a nitrifying suspended growth reactor that incorporates intraparticle diffusional limitation is presented. A parameter describing the physical characteristics of floc was introduced to overcome the experimental difficulties i
Autor:
Scott A. Wells, Richard I. Dick
Publikováno v:
Journal of Engineering Mechanics. 118:1738-1744
An experimental technique is developed using synchrotron radiation to determine changes in the degree of saturation in a drying porous matrix. Analyses of the drying characteristics of two synthetic slurries, kaolin and graphite, are made after dewat
Autor:
B. R. Bierck, Richard I. Dick
Publikováno v:
Water Science and Technology. 22:125-134
A synchrotron X-ray absorbance technique was used to monitor suspended solids concentration changes in compressible filter cakes formed at different constant pressure differentials. Results for a kaolin slurry and an activated sludge manifested the m
Autor:
Richard I. Dick, Barnes R. Bierck
Publikováno v:
Journal of Environmental Engineering. 116:663-682
Shrinkage can effect significant consolidation of saturated filter cakes, and results in production of filtrate that must be omitted from specific resistance calculations. Shrinkage results when curved air/liquid interfaces bounded by solids form at