NDLI: Dimensionless parameters to summarize the influence of microbial growth and inhibition on the bioremediation of groundwater contaminants

Content Provider	Springer Nature Link
Author	Mohamed, M. Hatfield, K.
Copyright Year	2011
Abstract	Monod expressions are preferred over zero- and first-order decay expressions in modeling contaminants biotransformation in groundwater because they better represent complex conditions. However, the wide-range of values reported for Monod parameters suggests each case-study is unique. Such uniqueness restricts the usefulness of modeling, complicates an interpretation of natural attenuation and limits the utility of a bioattenuation assessment to a small number of similar cases. In this paper, four Monod-based dimensionless parameters are developed that summarize the effects of microbial growth and inhibition on groundwater contaminants. The four parameters represent the normalized effective microbial growth rate (η), the normalized critical contaminant/substrate concentration (S), the critical contaminant/substrate inhibition factor (N), and the bioremediation efficacy (η). These parameters enable contaminated site managers to assess natural attenuation or augmented bioremediation at multiple sites and then draw comparisons between disparate remediation activities, sites and target contaminants. Simulations results are presented that reveal the sensitivity of these dimensionless parameters to Monod parameters and varying electron donor/acceptor loads. These simulations also show the efficacy of attenuation (η) varying over space and time. Results suggest electron donor/acceptor amendments maintained at relative concentrations S between 0.5 and 1.5 produce the highest remediation efficiencies. Implementation of the developed parameters in a case study proves their usefulness.
Starting Page	877
Ending Page	896
Page Count	20
File Format	PDF
ISSN	09239820
Journal	Biodegradation
Volume Number	22
Issue Number	5
e-ISSN	15729729
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-12-23
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Modeling Bioremediation Monod kinetics Inhibition Dimensionless Groundwater Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Microbiology Terrestrial Pollution Geochemistry Soil Science & Conservation Waste Management/Waste Technology
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Environmental Engineering Bioengineering Microbiology

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