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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/10355
Title: Mathematical modelling of stream DO-BOD accounting for settleable BOD and periodically varying BOD source
Authors: Tyagi B.
Gakkhar S.
Bhargava D.S.
Published in: Environmental Modelling and Software
Abstract: The conventional Streeter and Phelps model does not account for the settleable component of BOD. Their model is therefore of little value in the present day context of polluted streams in which part of the BOD removal necessarily takes place through sedimentation, especially when untreated or partially treated wastes are discharged into streams. Several other dispersion models developed to date also do not account for the settleable part of BOD. In the work presented here, an attempt is made to present a mathematical model accounting for dispersion effects, settling of the settleable part of BOD and the periodic variation of the BOD source. The dispersion model takes into account the bioflocculated sedimentation, as well as biochemical decay of nonsettleable BOD. An alternate finite difference scheme is used to solve the model representing the BOD-DO balance under the stated conditions in a stream.The conventional Streeter and Phelps model does not account for the settleable component of BOD. Their model is therefore of little value in the present day context of polluted streams in which part of the BOD removal necessarily takes place through sedimentation, especially when untreated or partially treated wastes are discharged into streams. Several other dispersion models developed to date also do not account for the settleable part of BOD. In the work presented here, an attempt is made to present a mathematical model accounting for dispersion effects, settling of the settleable part of BOD and the periodic variation of the BOD source. The dispersion model takes into account the bioflocculated sedimentation, as well as biochemical decay of nonsettleable BOD. An alternate finite difference scheme is used to solve the model representing the BOD-DO balance under the stated conditions in a stream.
Citation: Environmental Modelling and Software (1999), 14(5): 461-471
URI: https://doi.org/10.1016/S1364-8152(98)00091-7
http://repository.iitr.ac.in/handle/123456789/10355
Issue Date: 1999
Publisher: Elsevier Science Ltd, Exeter, United Kingdom
Keywords: BOD
Dispersion
Dissolved oxygen
Sedimentation
Stream modelling
ISSN: 13648152
Author Scopus IDs: 7005609412
6602189155
35568239200
Author Affiliations: Tyagi, B., Department of Mathematics, University of Roorkee, Roorkee, India
Gakkhar, S., Department of Mathematics, University of Roorkee, Roorkee, India
Bhargava, D.S., Department of Civil Engineering, University of Roorkee, 247 667, Roorkee, India
Corresponding Author: Bhargava, D.S.; Department of Civil Engineering, University of Roorkee, Roorkee 247 667, India
Appears in Collections:Journal Publications [MA]

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