|
… example for chemical waste water |
Zurich Airport
| Sewage type: | Deicing fluid (different kinds of glycol) |
| Sewage properties: | - Strongly fluctuating
concentrations from COD 20 mg/l up to 300 000 mg/l, in average COD 11 000 mg/l - Deficiency of nutrients (N, P) - Effluents occure in waves with extreme peaks depending on the weather conditions. |
| Plant technology: | During the project
of the airport extension (airport 2000), a
treatment plant was built onsite for highly concentrated deicing solution as Ecotechnical Sewage Plant by BASE TECH. |
| Capacity: | 1.700 population equivalents |
| Plant conception: | Storage and purification
of wastewater integrated in the same plant step saves costs remarkably. |
| Start up: | 1995 |
| Resulting
outlet concentrations: |
with COD 45 mg/l far below the imperative. |
Airport Berlin-Schönefeld
| Sewage type: | Deicing fluid |
| Plant technology: | Complete
wastewater purification system including Ecotechnical Sewage Plant with monitoring and control techniques from BASE TECH. |
| Capacity: | 4.000 population equivalents |
| Plant conception | Measurement and control techniques separate partial effluent flows depending on the various load degrees, respective to appropriate disposal technique. |
| Start up: | 1996 |
| Resulting
outlet concentrations: |
The COD concentration decreasing to 2% of initial concentration, which is far below the imperative. In addition decomposition of accompanying difficultly degradable substances such as HC, AOX, PAC. |
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