Deep bed filtration: A new look at the basic equations

Horner, R. Malcolm W.; Jarvis, R. J.; Mackie, R. I.

doi:10.1016/0043-1354(86)90011-4

Cited by 20 publications

(9 citation statements)

References 6 publications

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“…1 and 2 have been discussed by Horner et al (1984). Equations 1 and 2 can be solved to yield the effluent concentration and the amount of deposition as a function of distance and time.…”

Section: Empirical Modelsmentioning

confidence: 99%

A network model for deep bed filtration of solid particles and emulsion drops

1988

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A network model has been developed to simulate the flow of emulsions and solid particles through porous media. Particle deposition due to direct interception, as well pore plugging by straining are accounted for in the model. The effects of two important factors-the ratio of particle size to pore size, and the fluid velocity-on particle deposition are also investigated. The strength of the model lies in its ability to predict accurately effluent concentration profiles, permeability changes occurring during deep bed filtration, and the evolution of the filter coefficient with time. Model predictions for different particle and pore size distributions of both solid and emulsion particles are in agreement with experimental data. Vol. 34, No. 11 AIChE Journal Particle of Limitina traiectorv Flow in Parabolic velocity profile Figure 2. Particle capture probability is equivalent to fraction of total flow in annulus between R, and R, -@a.

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“…1 and 2 have been discussed by Horner et al (1984). Equations 1 and 2 can be solved to yield the effluent concentration and the amount of deposition as a function of distance and time.…”

Section: Empirical Modelsmentioning

confidence: 99%

A network model for deep bed filtration of solid particles and emulsion drops

1988

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“…It handles soluble material diffusion, biofilm growth and particular attachment and detachment. The filtration model is based on the modified Iwasaki equation [22]. The head loss is calculated by the Kozeny equation [23].…”

Section: Methodsmentioning

confidence: 99%

Modeling nitrogen removal for a denitrification biofilter

Samie

Bernier

Rocher³

et al. 2011

Bioprocess Biosyst Eng

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Nitrous oxide (N2O) is a major greenhouse gas, heavily contributing to global warming. N2O is emitted from various sources such as wastewater treatment plants, during the nitrification and denitrification steps. ASM models, which are commonly used in wastewater treatment, usually consider denitrification as a one-step process (NO3- directly reduced to N2) and are as such unable to provide values for intermediate products of the reaction like N2O. In this study, a slightly modified ASM1 model was implemented in the GPS-X software to simulate the concentration of such intermediate products (NO2-, NO and N2O) and to estimate the amounts of gaseous N2O emitted by the denitrification stage (12 biofilters) of the Seine-Centre WWTP (SIAAP, Paris). Simulations running on a 1-year period have shown good agreements with measured effluent data for nitrate and nitrite. The calculated mean value for emitted N2O is 4.95 kgN-N2O/day, which stands in the typical range of estimated experimental values of 4-31 kgN-N2O/day. Nitrous oxide emissions are usually not measured on WWTPs and so, as obtained results show, there is a certain potential for using models that quantify those emissions using traditionally measured influent data.

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“…It handles soluble material diffusion, biofilm growth and particular attachment and detachment. The filtration model is based on the modified Iwasaki equation (Horner et al, 1986). The head loss is calculated by the Kozeny equation (Reynolds and Richards, 1996).…”

Section: Figure 1: Seine-centre Biofiltration Line Dry Weather Configmentioning

confidence: 99%

Modeling Nitrogen Removal, Including Greenhouse Gas, for a Biofiltration Wastewater Treatment Plant

Samie¹,

Bernier²,

Rocher³

et al. 2010

proc water environ fed

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Nitrous oxide (N 2 O) is a major greenhouse gas, heavily contributing to global warming. N 2 O is emitted from various sources such as wastewater treatment plants, during the nitrification and denitrification steps. ASM models, which are commonly used in wastewater treatment, usually consider denitrification as a one-step process (NO 3 -directly reduced to N 2 ) and are as such unable to provide values for intermediate products of the reaction like N 2 O. In this study, a slightly modified ASM1 model was implemented in the GPS-X TM software in order to simulate the concentration of such intermediate products , NO and N 2 O) and to estimate the amounts of gaseous N 2 O emitted by the denitrification stage (12 biofilters) of the Seine-Centre WWTP (SIAAP, Paris). Simulations running on a one-year period have shown good agreements with measured effluent data for nitrate and nitrite. The calculated mean value for emitted N 2 O is 4.95 kgN-N 2 O/d, which stands in the typical range of estimated experimental values of 4 to 31 kgN-N 2 O/d. Nitrous oxide emissions are usually not measured on WWTPs and so, as obtained results show, there is certain potential for using models that quantify those emissions using traditionally measured influent data.

show abstract

Deep bed filtration: A new look at the basic equations

Cited by 20 publications

References 6 publications

A network model for deep bed filtration of solid particles and emulsion drops

A network model for deep bed filtration of solid particles and emulsion drops

Modeling nitrogen removal for a denitrification biofilter

Modeling Nitrogen Removal, Including Greenhouse Gas, for a Biofiltration Wastewater Treatment Plant

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