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Title
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Transient behaviour and time aspects of intermittently and continuously fed bacterial cultures with regard to filamentous bulking of activated sludge
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Author
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Abstract
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| Pure culture transient experiments with Arthrobacter globiformis and Sphaerotilus natans revealed that the floc-forming species A. globiformis can adapt better to intermittent feeding (I-feeding) than the filamentous species S. natans. The floc-forming bacterium showed a larger overcapacity for substrate uptake, a larger accumulation of reserves (polysaccharides and poly-β-hydroxybutyric acid) and a more efficient mobilization of these polymers. As a consequence A. globiformis became dominant in an I-fed dual culture of S. natans and A. globiformis. The transient behaviour of filamentous continuously fed (C-fed) sludge was similar to the response of S. natans. Consequently, I-feeding of activated sludge could prevent the excessive growth of filamentous bacteria. I-fed sludge, showed a higher overcapacity, the accumulation of more reserves and a shorter lag phase in protein synthesis than C-fed activated sludge, during the transient response, after a pulse dose of substrate. However, to be effective in the control of bulking, the frequency of I-feeding should allow for a sufficiently long endogenous phase. In addition the available fraction of the COD is important in the optimization of I-feeding as a control strategy for filamentous bulking. |
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Language
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English
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Source (journal)
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Applied microbiology and biotechnology. - Berlin, 1984, currens
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Publication
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Berlin
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1984
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ISSN
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0175-7598
[print]
1432-0614
[online]
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DOI
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10.1007/BF00252815
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Volume/pages
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19
:1
(1984)
, p. 44-52
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Full text (Publisher's DOI)
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