Abstract
The competition between floc-forming and non-settling filamentous populations has been analysed for an activated sludge process incorporating a plug-flow reactor and a settler. The substrate gradient along the reactor facilitates proliferation of the desired population and yields conversions which are higher than any possible in a mixed reactor, but with the disadvantage that larger reactor volumes are required. Design criteria determining the largest recycle ratio which can still assure growth of the floc-former, have been derived for single-substrate competition as well as for competition for oxygen and competition coupled with decay. The structure of the reactor-settler interaction has been analysed and compared with that of a mixed reactor-settler system.
Original language | English |
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Pages (from-to) | 173 |
Number of pages | 1 |
Journal | Chemical Engineering Journal |
Volume | 45 |
Issue number | 3 |
DOIs | |
State | Published - 1991 |
Externally published | Yes |