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Design and operation of rotating‐disk foam‐breakers fitted to tower fermenters
Author(s) -
Takesono Satoshi,
Onodera Masayuki,
Yamagiwa Kazuaki,
Ohkawa Akira
Publication year - 1993
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280570307
Subject(s) - bubble , circuit breaker , mechanics , tower , materials science , intensity (physics) , thermodynamics , mechanical engineering , physics , engineering , structural engineering , quantum mechanics
The design and operation of rotating‐disk mechanical foam‐breakers (MFRDs) fitted to tower fermenters, i.e. bubble columns (BCs), treating various foaming liquids were studied. The foam‐breaking behaviour of MFRDs fitted to BCs and the foaming behaviour of BCs were investigated respectively from the changes in the required critical disk rotational speed N c and those in liquid hold‐up in the foam, ø L . The effects of operating conditions on N c and ø L were evaluated quantitatively. On the basis of their results, the empirical equations for predicting N c and ø L in foam‐breaking regions, useful for the design and operation of MFRDs fitted to BCs, were obtained. The level of the required foam‐breaking power P kc of MFRDs was also clarified in relation to the level of ø L which reflects the foaming intensity of BCs and is related to the difficulty of foam‐breaking.