Abstract
Patterns of multiple steady states, due to substrate-inhibition kinetics, are analyzed for a realistic activated-sludge model that accounts for reactor-settler interaction and for the deterioration of settler performance with increased recycle ratio. It is shown that solutions can form, then, isolated branches or mushroom-shaped diagrams rather than the expected hysteresis loop. A systematic methodology for organizing analytical or experimental results, in the form of maps showing domains of bistability, is presented and applied.
Original language | English |
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Pages (from-to) | 929-938 |
Number of pages | 10 |
Journal | Water Research |
Volume | 27 |
Issue number | 5 |
DOIs | |
State | Published - May 1993 |
Externally published | Yes |
Keywords
- activated-sludge
- settler
- steady state multiplicity