NDLI: Simulation of Biodegradation in Infiltration Seepage— Model Development and Hydrodynamic Calibration

Content Provider	Springer Nature Link
Author	Wanko, A. Mose, R. Carrayrou, J. Sadowski, A. G.
Copyright Year	2005
Abstract	Wastewater sanitation using infiltration seepage belongs to the attached growth treatment line for pollutant waste. In a specific geographical context, and for a population of approximately 500 to 1000 population equivalent, it seems to be a good choice. Despite its rustic reputation, it is a considerably complex treatment line. The aim of this study is to contribute—using numerical simulation—to the understanding of the physical and biochemical phenomena which develop inside an infiltration seepage bed. The aspects which are essential to bacterial activity—the hydrodynamics of the porous medium, the development of the active biomass, transport of substrate, oxygen transfer and consumption—are dealt with. The splitting operator technique is used; its advantage is the separate solution of the convection, dispersion and kinetics equations; each with appropriate numerical techniques. By testing a methodical verification of the model, based on the analytical solutions, we learn that the hydrodynamic dispersion and the rate of degradation have opposite effects on the efficiency in decreasing the pollution loads. Moreover, a significant result which is obtained is the evaluation of the oxygenation capacities in relation to some of the treatment line's key parameters. Finally, we carried out by experiments a successful calibration of the flow model.
Starting Page	19
Ending Page	43
Page Count	25
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	177
Issue Number	1-4
e-ISSN	15732932
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-09-16
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	infiltration seepage porous media modeling numerical solution unsaturated water flow oxygen substrate splitting operator technique Hydrogeology Terrestrial Pollution Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Atmospheric Protection/Air Quality Control/Air Pollution Environment
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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Simulation of Biodegradation in Infiltration Seepage— Model Development and Hydrodynamic Calibration

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Simulation of Biodegradation in Infiltration Seepage— Model Development and Hydrodynamic Calibration