Deals with selected microbiological, biochemical, engineering, and modeling issues in order to fill some gaps in the operational and fundamental knowledge relating to the kinetic modeling of what has now become an established process in wastewater treatment. Looks at temperature effects on the physiology of removal, bioassays for determining glycogen, minimal aerobic sludge retention time, the effects of potassium limitation, the impact of excessive aeration, and other aspects. Submitted to Delft University and defended in September 1998. Includes a Dutch summary. No index. Annotation c. by Book News, Inc., Portland, Or.