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Title: Polynomialized model for critical DO deficit
Authors: Bhargava D.S.
Tyagi B.
Gakkhar S.
Published in: Journal of Environmental Science and Engineering
Abstract: The existing DO sag models of Streater-Phelps have become obsolete in the present day context of polluted streams in which a part of the BOD removal necessarily takes place through sedimentation. The Streater Phelps models do not consider this aspect. Bhargava's theoretically derived model for the critical DO deficit rests on an almost linear removal of the settleable BOD and an exponential decay of non-settleable BOD. However, the Bhargava's model has two independent but complex expressions, one each for times less than and greater than the transition time. A polynomialized form of Bhargava's models for critical DO deficit has been developed as a single expression and universally applicable without any regard to the transition time. Unlike, the Streeter-Phelps or Bhargava models, the presented polynomial form of Bhargava models, for critical DO deficit has an additional advantage of evaluating the critical dissolved oxygen deficit concentrations directly and without first determining the time of occurrence of such a deficit. The material presented would thus add to the exiting literature on the subject.
Citation: Journal of Environmental Science and Engineering (2008), 50(3): 223-226
Issue Date: 2008
Keywords: BOD
Critical DO deficit
Critical time
Polynomialized model
ISSN: 0367827X
Author Scopus IDs: 35568239200
Author Affiliations: Bhargava, D.S., Indian Institute of Technology, Roorkee, Bhargava Lane, Devpura, Haridwar 249 401 (Uttarakhand), India
Tyagi, B., Department of Mathematics, Galgotia College of Engineering and Technology, Greater Noida, India
Gakkhar, S., Department of Mathematics, Indian Institute of Technology, Roorkee (Uttarakhand), India
Corresponding Author: Bhargava, D. S.; Indian Institute of Technology, Roorkee, Bhargava Lane, Devpura, Haridwar 249 401 (Uttarakhand), India
Appears in Collections:Journal Publications [MA]

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