Fuhrberg waterworks

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Fuhrberg waterworks

The Fuhrberg waterworks is located in Fuhrberg in the northern part of the Hanover region . The waterworks , built from 1959 to 1964, supplies around 45 percent of the approximately 650,000 people in the parts of the Hanover region with drinking water that is in the supply area of ​​the Hanover municipal utility .

The capacity is around 86,400 m³ per day.

location

The waterworks is located in Fuhrberg, about 25 km north of Hanover in the Fuhrberger Feld water protection area , a valley sand area of ​​the Aller . The water protection area is delimited by an imaginary line between Hanover and Celle, the Aller and the BAB 7 . The water extraction area is divided into three protection zones. Protection zone I is the area in which the fountain systems are located. This fenced area is excluded from any other use. Protection zone II is characterized by the fact that the water needs 50 days from its outer edge to the well. The other protection zone, protection zone III, corresponds to the Fuhrberger Feld water protection area .

Water extraction and purification

Company premises
Accelator at the Fuhrberg waterworks
Filter hall in the Fuhrberg waterworks

The drinking water is obtained from groundwater naturally formed by precipitation . For this purpose, five horizontal filter wells were installed at a depth of twenty-five meters. A horizontal filter well consists of a vertically inserted shaft with a diameter of up to four meters, from which an average of eight to ten horizontal filter strands with an individual length of 32 to 70 meters radiate. Up to 4,000 cubic meters of water per hour can be fed to the waterworks from these five wells.

When it arrives at the waterworks, the water from the five wells is mixed in the mixing tower in order to keep the water to be used for cleaning as homogeneous as possible. In the mixing tower, it is pumped to a sufficient height to be able to pass through the following stations of the waterworks in free fall.

The substances dissolved in the groundwater such as humic substances , manganese and iron are removed from the water during treatment. In the ventilation chambers, the water is enriched with atmospheric oxygen to oxidize manganese and iron. The accelerators are used to remove the oxidized iron compounds. To this end, flocculants are added, in which humid substances and iron compounds accumulate. These flakes settle in the accelerators and are cleared from time to time.

After the water has left the accelerators, hydrated lime is added to it. In the filter hall it is passed over open filter gravel. Residues of humic substances and iron are removed. Ammonium is converted to nitrate by microorganisms. Manganese is deposited. The cleaning is complete.

The average length of time water that occurs as precipitation remains in the ground is around 30 years until it reaches the waterworks via the wells.

Coverage area

Stadtwerke Hannover supplies the following communities: Hanover , Laatzen , Langenhagen , Seelze and partly the communities of Hemmingen (Lower Saxony) and Ronnenberg . In this supply area, a share of around 45 percent is fed into the pipeline network by the Fuhrberg waterworks. Since it is a total network, an exact supply area that is supplied by the Fuhrberg waterworks cannot be determined.

Others

There is a drinking water adventure trail at the waterworks. At thirteen stations, everyone can experience the path of water to the waterworks close to nature. On September 13, 2009, the 50th anniversary of the waterworks was celebrated with an open day.

Individual evidence

  1. water-click.de: What (ser) for you! Information on the Fuhrberg waterworks (PDF; 151 kB)
  2. water-click.de: What (ser) for you! Information on the Fuhrberg waterworks (PDF; 151 kB)
  3. Information from Stadtwerke Hannover about the supply area ( Memento from June 6, 2009 in the Internet Archive )
  4. waterclick.de: The water production in the Fuhrberger field

Web links

Commons : Wasserwerk Fuhrberg  - Collection of images, videos and audio files

Coordinates: 52 ° 34 ′ 41.1 ″  N , 9 ° 51 ′ 23 ″  E