Abstract/Details

Degradation of glycol based aircraft deicing fluids under anaerobic methanogenic conditions


2000 2000

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Abstract (summary)

Large quantities of aircraft deicing fluid (ADF) comprised mainly of ethylene glycol (EG) and propylene glycol (PG) are used for aircraft deicing/anti-icing during cold weather operations at airports throughout the world. Several different formulations of ADF have been developed and are used. Type I solutions are commonly employed to remove snow and ice from aircraft surfaces (deicing), and Type IV solutions are commonly applied to prevent ice from reforming (anti-icing).

The runoff from aircraft deicing operations is known to have a high oxygen demand. As a consequence, deicing wastes are often collected at airports for treatment. ADF products also contain small amounts of colorants, corrosion inhibitors, and thickeners, and these compounds may pose a greater environmental concern than oxygen depletion. Several studies have been completed to compare the relative toxicity of the pure glycols (EG and PG) vs. ADF using Microtox ® assays and other aquatic tests, and it has been reported that ADF is significantly more inhibitory than the pure glycols.

With growing concern over the environmental consequences of deicing there has been interest in developing anaerobic technology to treat deicing waste. In this dissertation a survey, a deicing waste characterization study, and research efforts employing serum bottles and bench scale laboratory reactors were used to demonstrate that ADF may be degraded effectively and efficiently in an anaerobic methanogenic environment. The factors that may affect this degradation are examined and discussed.

Indexing (details)


Subject
Environmental engineering;
Aerospace materials
Classification
0775: Environmental engineering
0538: Aerospace materials
Identifier / keyword
Applied sciences; Aircraft; Anaerobic; Degradation; Deicing; Glycol-based
Title
Degradation of glycol based aircraft deicing fluids under anaerobic methanogenic conditions
Author
Veltman, Shawn Herbert
Number of pages
362
Publication year
2000
Degree date
2000
School code
0118
Source
DAI-B 61/02, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780599645486, 0599645482
Advisor
Switzenbaum, Michael S.
University/institution
University of Massachusetts Amherst
University location
United States -- Massachusetts
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
9960797
ProQuest document ID
304605374
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304605374
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