Bioaugmentation to degrade the organic de-icers acetate and monopropylene glycol at low temperatures
| Autor: | Willy Verstraete, Ilse Forrez |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Biochemical oxygen demand
Bioaugmentation Environmental Engineering Aircraft Bacteria Chemistry Potassium Ice Environmental engineering Temperature chemistry.chemical_element Biodegradation Microbial consortium Propylene Glycol Biostimulation Activated sludge Biodegradation Environmental Environmental chemistry Surface water Potassium Acetate Water Pollutants Chemical Water Science and Technology |
| Zdroj: | Water science and technology : a journal of the International Association on Water Pollution Research. 60(6) |
| ISSN: | 0273-1223 |
| Popis: | Two de-icers, potassium acetate and monopropylene glycol (MPG), used widespread as a runway and wing de-icer respectively, can exert high BOD in the surrounding waters. A bioaugmentation approach to degrade these de-icer compounds in the drainage water prior to discharge has been tested. A microbial consortium originating from soil was enriched at low temperatures (4°C) in order to adapt to wintertime conditions. With 0.05 g CDW/L of biocatalyst, maximum specific removal rates up to 1.46 and 3.33 g acetate/g CDW d at 4°C were achieved with and without biostimulation respectively. An acetate:MPG mixture of 1:3 at a total COD concentration of 0.80 and 1.20 g/L was degraded in 12 days by 83 and 70% respectively. Bioaugmentation in the field over a period of 25 days showed a removal of 88% MPG compared to 46% in the control. These results demonstrate that bioaugmentation of airport runoff water can be successfully applied to prevent organic de-icer compounds from entering the receiving surface waters. |
| Databáze: | OpenAIRE |
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