Kinetics of anaerobic degradation of glycol-based Type I aircraft deicing fluids

Citation
T. Schoenberg et al., Kinetics of anaerobic degradation of glycol-based Type I aircraft deicing fluids, BIODEGRADAT, 12(1), 2001, pp. 59-68
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Biotecnology & Applied Microbiology
Journal title
BIODEGRADATION
ISSN journal
0923-9820 → ACNP
Volume
12
Issue
1
Year of publication
2001
Pages
59 - 68
Database
ISI
SICI code
0923-9820(2001)12:1<59:KOADOG>2.0.ZU;2-F
Abstract
The kinetics of anaerobic degradation of glycol-based Type I aircraft deici ng fluids (ADFs) were characterized using suspended-growth fill-and-draw re actors. Both Type I ADFs tested showed near-complete anaerobic degradabilit y. First-order degradation rate constants of 3.5 d(-1) for the propylene gl ycol-based Type I ADF and 5.2 d(-1) for the ethylene glycol-based Type I AD F were obtained through continuous-culture means under mesophilic condition s (35 degreesC). Fill-and-draw operation at lower temperatures affected ana erobic degradability only minimally down to 25 degreesC but substantially b elow 25 degreesC. High Type I ADF feed concentrations substantially affecte d degradability. Batch testing of fill-and-draw reactors resulted in first- order degradation rate constants of 1.9 d(-1) for propylene glycol-based Ty pe I ADF and 3.5 d(-1) for ethylene glycol-based Type I ADF.