This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Biological Degradation of Spent De-Icing Fluids in a Municipal Wastewater Treatment Plant – Experiences and Challenges
Technical Paper
2007-01-3349
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Oslo Airport Gardermoen (OSL) is situated over a ground water reservoir, and collection and handling of spent de-icing fluids is therefore of major importance. OSL have chosen to handle low- and medium strength spent fluids in cooperation with a nearby municipal wastewater treatment plant (WWTP). Medium strength fluid is used as a carbon source for nitrogen removal, and thus used as a resource. Low strength fluid is pre-treated in an aerobic biofilm reactor before it is routed to the plant inlet.
Prior to the choice of solution for disposal of the fluids, investigations were performed in laboratory and pilot scale. The efficiency of the fluid as a carbon source for denitrification was studied in parallel with ethanol and methanol as well documented carbon sources. The achieved denitrification rates were comparable with those achieved with methanol, while the necessary addition of carbon source was slightly higher for spent de-icing fluid than for methanol. The treatment plant has been operating for almost 9 years, with operational results confirming the spent de-icing fluid to be appropriate as a carbon source.
The possible toxicity and low degradability of some of the additives were particular concerns, and was studied for both aerobic and anaerobic biological processes. While the rather toxic fatty alcohol ethoxylate was easily biodegradable when sufficiently diluted, the additives benzotriazole and sodium petroleum sulphonate were hardly or not biodegradable. The latter two additives were therefore substituted. The laboratory scale results were confirmed in full scale prior to this substitution.
The pre-treatment of the low strength spent deicing fluid in an aerobic biofilm reactor followed by coagulation and dissolved air flotation was tested in laboratory and pilot scale. The pre-treatment produces water suitable for discharge to the biological stage at the municipal WWTP. This technical solution is implemented, with operational results confirming that this integrated treatment of spent de-icing fluids in a WWTP is a good solution.
Recommended Content
Technical Paper | Microwave Enhanced Freeze Drying of Solid Waste |
Technical Paper | A Case Study of Stormwater Runoff Containing Deicing / Anti-icing Fluids Treatment at DFW Airport |
Aerospace Material Specification | Sand, Airport Snow and Ice Control |
Authors
Topic
Citation
Hem, L., Rusten, B., and Skjefstad, J., "Biological Degradation of Spent De-Icing Fluids in a Municipal Wastewater Treatment Plant – Experiences and Challenges," SAE Technical Paper 2007-01-3349, 2007, https://doi.org/10.4271/2007-01-3349.Also In
References
- Anderson B. Nyberg U. Aspegren H 1995 Methanol and ethanol as external carbon sources for denitrification Valve M. Nitrogen removal from municipal wastewater, Copenhagen, Nordic Council of Ministers 110
- Hem, L. J. Weideborg, M Schram, E. 2000 Degradation and toxicity of additieves to aircraft de-icing fluids Proceedings from 2000 WEF and Purdue Univ. Industrial Wastes Technical Conference May 2000
- Rusten B. Siljudalen J. G. Nordeidet B. 1994 Upgrading to nitrogen removal with the KMT moving bed biofilm process Wat. Sci. Tech 29 12 185 195
- Rusten B. Wien A. Skjefstad J. 1996 Spent Aircraft Deicing Fluid as External Carbon Source for Denitrification of Municipal Wastewater - From Waste Problem to Beneficial Use 51 st Purdue Industrial Waste Conference Proceedings Ann Arbor Press, Inc. Chelsea, Michigan, USA 359 369
- Rusten B. Lundar A. Tranum I. Skjefstad J. 2002 Cost-effective co-treatment of spent airport deicing chemicals and municipal wastewater Water Environment Federation's WEFTEC 2002 Conference Chicago September
- Tranum I. Rusten B. Wien A. 2001 Deicing chemicals as a pollution source and as an external carbon source for nitrogen removal at the Gardermoen wastewater treatment plant Nordic Conference on Wastewater Treatment Copenhagen January
- Ødegaard H. Rusten B. Westrum T. 1994 A new moving bed biofilm reactor - Applications and results Wat. Sci. Tech 157 165