ARA Winterthur-Hard

from Wikipedia, the free encyclopedia
Wastewater treatment plant (ARA) from Stadtwerk Winterthur
The sewage treatment plant after the expansion in 1991
The sewage treatment plant after the expansion in 1991
Location: Winterthur - Hardau
Procedure: Töss
Wastewater treatment from: Winterthur , Brütten , Kyburg , Turbenthal , Wiesendangen , Wila and Zell and partly from Elsau , Fischingen , Sternenberg , Weisslingen and Wildberg .
ARA Winterthur-Hard (Canton of Zurich)
ARA Winterthur-Hard
Coordinates 692 548  /  263 461 coordinates: 47 ° 30 '55 "  N , 8 ° 40' 2"  O ; CH1903:  692,548  /  two hundred sixty-three thousand four hundred sixty-one
Data on the structure
Extension size: 180,000
Affiliated population value: 123,535
Construction time: 1951
Amounts of water
Wastewater volume: 55,000 m³ / a
Average drainage values
BOD 5 : 2 mg / l
P tot : 0.5 mg / l
NH 4 -N : 0.009 mg / l
Residues
Sludge dry matter: 320 m³ / day
Power generation
Sewage gas generation: 4500 m³ / day
Power generation: 1,700,000 kWh / a
Technical facilities
Others

The wastewater treatment plant (ARA) in the Hard is the ARA of the city of Winterthur and is operated by Stadtwerk Winterthur .

history

The ARA Hard during the expansion in 1989

On May 21, 1939, the Winterthur sovereign approved the construction of a mechanical sewage treatment plant. For this, part of the hard forest had to be cleared, which had to be reforested south of the sewage treatment plant. After some delays, also due to the war, the first parts were put into operation in 1949 and the whole plant until 1951. In 1966 the plant was expanded to include a biological purification stage. ARA was expanded to include sludge dewatering and an incineration plant for ten years, and in 1979 the plant for phosphate precipitation was added.

From 1986 to 1992, the ARA was subjected to a total overhaul and enlarged for 100 million francs in order to meet the requirements of the Water Protection Act passed in 1971. A second digestion tower was put into operation in 2015.

By 2035, as part of the wastewater-free Tösstal project , the municipalities of Bauma and Weisslingen , which previously operate their own sewage treatment plants, are to be connected to the Winterthur-Hard WWTP. The corresponding proposal was accepted by the voting population of six affected communities in the Töss Valley and Winterthur in 2019.

Varia

The Winterthur circular route leads around the ARA Winterthur-Hard and offers an overview of the sewage treatment plant from a viewing platform.

Web links

Commons : Sewage Treatment Hard  - Collection of Pictures, Videos and Audio Files

Individual evidence

  1. ↑ a b c ARA Winterthur-Hard, Winterthur. (PDF) Building Directorate Canton Zurich, Office for Waste, Water, Energy and Air, accessed on September 9, 2019 .
  2. ^ City of Winterthur (ed.): Klaro, the small drip. A story about the expansion of the Hard Winterthur 1001 sewage treatment plant. 3rd edition. Winterthur 1996.
  3. ↑ Michael Wiesner: clearing in the Hardwald before the Second World War. In: waldzeit.ch. April 2, 2013, accessed September 9, 2019 .
  4. ^ Wastewater treatment in Winterthur. (PDF; 545 KB) Figures, data and facts about the wastewater treatment plant (ARA) in Winterthur. Stadtwerk Winterthur , December 2015, accessed on September 9, 2019 .
  5. ↑ Second digestion tower for wastewater treatment plant in operation. City of Winterthur, October 27, 2015, accessed on September 9, 2019 .
  6. ↑ Rafael Rohner: Together for wastewater-free Töss . In: The Landbote . May 20, 2019, p. 9 ( landbote.ch ).