Modeling steady-state methanogenic degradation of phenols in groundwater

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Authors:Bekins, Barbara A.; Godsy, E. Michael; Goerlitz, Donald F.
Author Affiliations:Primary:
U. S. Geological Survey, Water Resources Division, Menlo Park, CA, United States
Volume Title:Journal of Contaminant Hydrology
Source:Journal of Contaminant Hydrology, 14(3-4), p.279-294. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0169-7722
Publication Date:1993
Note:In English. 21 refs.; illus., incl. 1 table, sketch map
Summary:Field and microcosm observations of methanogenic phenolic compound degradation indicate that Monod kinetics governs the substrate disappearance but overestimates the observed biomass. In this paper we present modeling results from an ongoing multidisciplinary study of methanogenic biodegradation of phenolic compounds in a sand and gravel aquifer contaminated by chemicals and wastes used in wood treatment. Field disappearance rates of four phenols match those determined in batch microcosm studies previously performed by E.M. Godsy and coworkers. The degradation process appears to be at steady-state because even after a sustained influx over several decades, the contaminants still are disappearing in transport downgradient. The existence of a steady-state degradation profile of each substrate together with a low biomass density in the aquifer indicate that the bacteria population is exhibiting no net growth. This may be due to the oligotrophic nature of the biomass population in which utilization and growth are approximately independent of concentration for most of the concentration range. Thus a constant growth rate should exist over much of the contaminated area which may in turn be balanced by an unusually high decay or maintenance rate due to hostile conditions or predation. Abstract Copyright (1993) Elsevier, B.V.
Subjects:Aquifers; Biomass; Creosote; Degradation; Ground water; Organic compounds; Phenols; Pollutants; Pollution; Steady-state processes; Waste disposal; Waste water; Escambia County Florida; Florida; Gulf Coastal Plain; Pensacola Florida; United States; Methanogenic processes; Monod kinetics
Coordinates:N302600 N302600 W0871200 W0871200
Record ID:2005007664
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
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