DLX737200
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Joined: Tue May 29, 2001 6:42 am

Glycol, Airports, And EPA Regulations

Sat Oct 02, 2010 5:37 pm

Hey everyone,

I'm curious about airports and the methods they employ to prevent deicing fluid from hazardously affecting the environment. Does anybody know of any current regulations in place for the collection of glycol and/or any airports that have extensive systems in place for this?
 
YWG
Posts: 1055
Joined: Wed Feb 07, 2001 11:29 am

RE: Glycol, Airports, And EPA Regulations

Sun Oct 03, 2010 3:22 pm

Quoting DLX737200 (Thread starter):
airports and the methods they employ to prevent deicing fluid from hazardously affecting the environment.

Most of the places I fly have a "De-Ice Pad", in other words an apron devoted to de-icing. They have what looks like vacuum trucks driving around sucking up all the excess off the ground. Supposedly they recycle it and use it in anti-freeze and various automotive products. That being said, there is always a trail of glycol (dripping from the wings) from this pad to the active runway. Nothing is preventing it from getting into the local water.
Contact Winnipeg center now on 134.4, good day.
 
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glen
Posts: 263
Joined: Thu Jun 30, 2005 4:43 pm

RE: Glycol, Airports, And EPA Regulations

Sun Oct 03, 2010 3:37 pm

Quoting DLX737200 (Thread starter):
any airports that have extensive systems in place for this?

The glycol is not toxic per se, but when the quantities normally used on a winter day come into a river it will disturb the natural balance of the water, especially the oxygen level and can kill quite a lot of fish over time. Therefore in ZRH the fluid contaminated water on the airfield is recovered and then spread through the year over the fields around the airport, where it will be slowly reduced.
More here:
http://www.zurich-airport.com/Portal...aerm/De_icing_Sewage_Treatment.pdf

[Edited 2010-10-03 08:40:19]
"The horizon of many people is a circle with zero radius which they call their point of view." - Albert Einstein
 
qblue
Posts: 124
Joined: Thu Jul 01, 2004 3:47 am

RE: Glycol, Airports, And EPA Regulations

Thu Oct 07, 2010 2:42 am

De-icing pads are designed for the drains to be directed to special recovery tanks or ponds. When they have enough collected it is shipped to a recycling plant to be used again. I'm not sure if it is recycled for aircraft use or to other products. They also use vacuum trucks to pick-up glycol when de-icing is done on the apron.
 
Tristarsteve
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Joined: Tue Nov 22, 2005 11:04 pm

RE: Glycol, Airports, And EPA Regulations

Thu Oct 07, 2010 3:53 am

At ARN there is a deicing pad for only one runway. There is no room to build one on the other two.
Deicing is allowed at most gates, the water drain from these gates goes to a holding pond.
After deicing, the remaining fluid on the ground is vacuumed up and sent to this pond as well.
Nordic Aero has a recycling plant and recycles all this fluid.
All the snow that is swept off the airport runways, taxyways, and aprons is dumped at the threshold of 01L. The runoff from this dump is also collected and sent to the recycler. In the spring as the snow melts, this enormous mound of contaminated snow stinks as it slowly melts.
The deicing companies also try and limit the amount of glycol used. First they blow off the snow with an airblower fitted to every deicing truck, then they will start the deicing process by using hot water to wash off the remaining snow before applying glycol. It is in their interest to do this as they run the recycling system.

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