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Study of surface regeneration characteristics of a candle filter at high temperatureViswanathan, Balakrishnan, January 2004 (has links)
Thesis (M.S.)--West Virginia University, 2004. / Title from document title page. Document formatted into pages; contains xi, 106 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 96-98).
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Study on candle filter surface regeneration characteristics at room temperatureVasudevan, Venkatesh, January 2003 (has links)
Thesis (M.S.)--West Virginia University, 2003. / Title from document title page. Document formatted into pages; contains xxiii, 271 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 268-271).
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Experimental investigation on peculiarities of the filtration combustion of the gaseous fuel-air mixtures in the porous inertia mediaMbarawa, M, Kakutkina, NA, Korzhavin AA 17 August 2007 (has links)
This study investigates peculiarities of the filtration combustion (FC) of the gaseous fuel-air mixtures in a porous
inertia media (PIM). Combustion wave velocities and temperatures were measured for hydrogen-air, propane-air and
methane-air mixtures in the PIM at different mixture filtration velocities. It is shown that the dependences of the
combustion wave velocities on the equivalence ratio are V-shaped, It was further confirmed that the FC in the PIM has
more contrasts than similarities with the normal homogeneous combustion. One of the interesting observations in the
present study, which is not common in normal homogenous combustion, is the shifting of the fuel-air equivalent ratio at
the minimum combustion wave velocity from the stoichiometric condition (¢ = 1). For a hydrogen-air mixture, the
fuel-air equivalence ratio at the minimum combustion velocity shifts from the stoichiometric condition to the rich
region, while for the propane-air and methane-air mixtures the fuel-air equivalence ratio at the minimum combustion
velocity shifts toward fuel-leaner conditions. The measured maximum porous media temperatures in the combustion
waves are found to be weakly dependent on the mixture filtration velocities. In general, the effects of the mixture
filtration velocities on the measured maximum porous media temperatures are not significant.
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Performance of multistage filtration using different filter media against conventional water treatment systemsOchieng, GMM, Otieno, FAO, Ogada, TPM, Shitote, SM, Menzwa, DM 03 July 2004 (has links)
Abstract
This study was aimed at introducing multistage filtration (MSF) (a combination of slow-sand filtration (SSF) and pretreatment
system - horizontal flow roughing filter (HRF)) as an alternative water treatment technology to the conventional one. A pilot- plant
study was undertaken to achieve this goal. Evaluating the MSF performance vs. the existing conventional system in removing
selected physical and chemical drinking water quality parameters together with the biological water quality improvement by the
MSF without chemical use was done. Evaluation of the effectiveness of the MSF system utilizing locally available material, i.e.
gravel, improved agricultural waste (charcoal maize cobs) and broken burnt bricks as pretreatment filter material was also done
The benchmark was the Kenya Bureau of Standards (KEBS) values for the selected parameters. Results showed that with proper
design specifications, MSF systems perform better than conventional systems under similar conditions of raw water quality and
environmental conditions. The tested locally available materials can also be effectively used as pretreatment media with each
allowing a filter run greater than 82 d and therefore could serve as alternatives where natural gravel is not readily available. With
special reference to the bacteriological quality improvement, the MSF greatly improved the bacteriological quality of the water
recording removal efficiencies of over 99% and 98% respectively for E. coli and total coliforms. Despite the observed performance,
MSF should be complemented with chlorination as a final buffer against water-borne diseases. However, in this case, the dosing
will be greatly reduced when compared to the conventional system.
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FILTRATION OF CHARGED PARTICLES IN AN ELECTRICAL FIELDCooper, Fredrick Christian, 1940- January 1967 (has links)
No description available.
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Backwash: expansion relationships in filter bedsRuggles, Gordon Charles, 1943- January 1968 (has links)
No description available.
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Effect of molecular weight on polymer filter aidsBurr, John Gregory, 1946- January 1972 (has links)
No description available.
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Electro-ultrafiltration with rotating dynamic membranesTurkson, Abraham K. January 1985 (has links)
In axial electrofiltration, a DC electric field is imposed between a rotating inner cylinder and a stationary outer cylinder giving rise to four mechanisms which act to minimize solute accumulation at the filter surface: turbulence, centrifugal force, electrophoresis and shear stress which removes solute aggregates. / Four dynamic membranes, Zr(IV) oxide, calcium oleate, poly-2-vinylpyridine and cadmium sulfide, were used to filter bovine serum albumin (BSA) in a disodium phosphate solution at pH = 8 and Prussian blue in distilled water. Prussian blue is a particle of 0.01(mu)m diameter with a zeta potential of -41mV while BSA is a macromolecule of 69,000 molecular weight, a Stokes-Einstein radius of 0.0038(mu)m and a zeta potential of -23.3mV at pH = 8. For BSA, the flux declined with time while the rejection increased. Filtrate fluxes increased with rotation rate and electric field and declined with concentration for both feeds. The flux declined beyond N = 2000rpm and was constant above C(,0) = 5.0wt%. For Prussian blue, the rejection was greater than 90% at all levels of E, N and C(,0). For BSA, the rejection increased with rotation rate and declined with concentration. The BSA rejection declined above N = 2000rpm and was constant beyond C(,0) = 0.5wt%. / A mathematical model was derived to predict the time variation of filtrate flux and a rejection model was used to predict the effect of surface concentration on BSA rejection.
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Nonstationary signal modeling, filtering, and parameterizationSills, James A. 05 1900 (has links)
No description available.
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Mechanisms of particle detachment during filter backwashingRaveendran, Palanivel 12 1900 (has links)
No description available.
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