Population dynamics in controlled unsteady-state systems: An application to the degradation of glyphosate in a sequencing batch reactor

Miscellaneous · Fri Jan 01 00:00:00 EST 1988

OSTI ID:7075609

Devarakonda, M S

Control over population dynamics and organism selection in a biological waste treatment system provides an effective means of engineering process efficiency. Examples of applications of organism selection include control of filamentous organisms, biological nutrient removal, industrial waste treatment requiring the removal of specific substrates, and hazardous waste treatment. Inherently, full scale biological waste treatment systems are unsteady state systems due to the variations in the waste streams and mass flow rates of the substrates. Some systems, however, have the capacity to impose controlled selective pressures on the biological population by means of their operation. An example of such a system is the Sequencing Batch Reactor (SBR) which was the experimental system utilized in this research work. The concepts of organism selection were studied in detail for the biodegradation of a herbicide waste stream, with glyphosate as the target compound. The SBR provided a reactor configuration capable of exerting the necessary selective pressures to select and enrich for a glyphosate degrading population. Based on results for bench scale SBRs, a hypothesis was developed to explain population dynamics in glyphosate degrading systems.

• Research Organization: Notre Dame Univ., IN (USA)
• OSTI ID: 7075609
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
HERBICIDES
BIODEGRADATION
MICROORGANISMS
POPULATION DYNAMICS
PROCESS CONTROL
WASTE PROCESSING PLANTS
BENCH-SCALE EXPERIMENTS
BIOREACTORS
DESIGN
EFFICIENCY
HAZARDOUS MATERIALS
INDUSTRIAL WASTES
PERFORMANCE
CHEMICAL REACTIONS
CONTROL
DECOMPOSITION
INDUSTRIAL PLANTS
MATERIALS
PESTICIDES
WASTES
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management