Municipal waterworks Leipzig
| Leipziger Wasserwerke GmbH
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|---|---|
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| legal form | GmbH |
| founding | 1991 |
| Seat | Leipzig , Germany |
| management | Michael M. Theis Ulrich Meyer |
| Number of employees | 551 (2018) |
| sales | 156.2 million euros (2018) |
| Branch | Water sewage |
| Website | www.L.de/wasserwerke |
The Leipziger Wasserwerke (LWW) are a water supply company in the region of Central Germany. They are part of the Leipzig supply and transport company, which also includes the Leipziger Stadtwerke and the Leipziger Verkehrsbetriebe. The Leipzig waterworks are owned by the City of Leipzig (74.65%) and the Association for Water Supply and Wastewater Disposal Leipzig-Land (25.35%). It is responsible for the drinking water supply and wastewater disposal for Leipzig and the region.
history
Until 1866, the city of Leipzig was supplied with water from the Mühlpleiße . The medieval water arts pumped the river water into the city's wells. Wooden pumps powered by water power conveyed the water to higher-lying storage tanks, from which it flowed through pipes to the consumers.
The increasing water consumption due to industrialization made it necessary to build the Connewitz waterworks in 1866 . At the western end of Kaiserin-Augusta-Strasse (today Richard-Lehmann-Strasse), the city's first groundwater works was built by English engineers on the site of what would later become the city's garden center. The water, which was obtained from a seepage water gallery on the farmer's meadows in the Pleißenaue, was pumped to the Probstheida underground tank facility with a capacity of 4,000 cubic meters. For the first time, it was fed by a modern pressurized water supply system. With the transition to overland supply, the Connewitz waterworks gradually went out of operation after 1887.
After the hydraulic engineer Adolf Thiem, commissioned by the city of Leipzig in 1877 , could not find sufficient groundwater deposits in the city, he was referred to Naunhof by the then head of the Royal Saxon Geological State Institute Hermann Credner . There is "an ice-age trough bed with large amounts of groundwater" to be found, "the drying up of which is unthinkable." After drilling confirmed the water resources, the Naunhof 1 waterworks was built from 1882 to 1887 according to Thiem's plans. With its 15 km long pipeline to Leipzig, this was considered the largest and most modern waterworks in Europe at the time. In addition, Thiem had an iron removal system built for the Naunhofer Wasser in Probstheida . With a capacity of 30,000 cubic meters per day, the waterworks supplied the city via a high-pressure water pipe. In order to cover the further water demand, the Naunhof 2 waterworks followed in 1896 west of the town of Naunhof with the same delivery capacity.
In order to secure another drinking water production location, the City Council of Leipzig acquired the area in the Muldenaue between Nischwitz and Wasewitz, including the farms, after extensive hydrogeological studies in 1907 for 5 million marks . The Canitz waterworks, also planned by Thiem, went into operation there in 1912; to this day it is the largest of the Leipzig waterworks. The water has been transported to Leipzig via a 25-kilometer pipeline since 1912. The Thallwitz waterworks was the last large waterworks to go online in 1943.
In 1964 the VEB Wasserversorgung und Abwasserverarbeitung Leipzig (VEB WAB Leipzig) was founded, which is responsible for the water supply in the city of Leipzig, the district of Leipzig and the districts of Delitzsch, Eilenburg, Wurzen, Torgau, Geithain, Grimma, Döbeln, Oschatz, Altenburg, Schmölln and Borna took over.
After the political change, VEB WAB Leipzig was converted into a corporation, the water supply and waste water treatment Leipzig GmbH founded in 1990. On March 1, 1991 the Städtische Wasserwerke Leipzig GmbH was founded. In December of the same year, 49 cities and municipalities in the district of Leipzig-Land merged to form the Association for Water Supply and Wastewater Disposal Leipzig-Land (ZV WALL), thereby transferring all rights and obligations of water supply and wastewater disposal to the association. In the course of the real division of the water supply and waste water treatment Leipzig GmbH, fixed assets and investments were transferred to the Städtische Wasserwerke Leipzig on January 1, 1994. With a resolution of the Leipzig City Council of September 15, 1993, the name was changed to Kommunale Wasserwerke Leipzig GmbH on October 14, 1994. At the same time, the association for water supply and wastewater disposal in Leipzig-Land concluded an operator contract with the Leipzig municipal waterworks for water supply and wastewater disposal as well as the maintenance, renewal and expansion of the public facilities of the association.
In 1994 Wassergut Canitz GmbH was founded as a subsidiary for the ecological management of agricultural areas in the drinking water catchment area. Sachsen Wasser GmbH and Bau und Service Leipzig GmbH were added as further subsidiaries in 2000 and Sportbäder Leipzig GmbH and Wasseraufbereitung Knautnaundorf GmbH in 2004. Sachsen Wasser GmbH and Wasseraufbereitung Knautnaundorf GmbH have not been part of the Leipzig waterworks portfolio since January 1, 2015.
The municipal waterworks took over the supply of the Wiedemar community in 2008 and the wastewater disposal of the Machern and Jesewitz communities in 2010 .
The municipal waterworks in Leipzig have been part of the Leipziger Versorgungs- und Verkehrsgesellschaft mbH holding since 1997 .
The companies of the Leipziger Group - Leipziger Stadtwerke, Verkehrsbetriebe, waterworks and sports pools - have been operating under a common brand since January 11, 2016.
Companies
The Leipzig waterworks now operate the five waterworks Naunhof 1 and 2, the Canitz , Thallwitz and Belgershain waterworks , as well as the Probstheida water supply system . In the 2018 financial year, the waterworks supplied 694,000 residents in the Leipzig area with drinking water. The pipe networks are more than 3,400 kilometers long. The wastewater is treated in 23 sewage treatment plants, the largest of which is the Rosental sewage treatment plant . Of the nine historic water towers that belong to the waterworks in Leipzig and the surrounding area and that are all listed, Probstheida, Engelsdorf and Zwenkau are still in operation. To stabilize the water supply, underground cisterns are operated as elevated tanks in high-altitude areas, for example on the Galgenberg near Liebertwolkwitz since 1958 and on the Black Mountain near Taucha since 1977 .
The wastewater from around 662,100 residents in Leipzig and the region was treated by the Leipzig waterworks in 2018. The sewer network length was around 2,900 km in 2018. Overall, the drinking and sewage network of the Leipzig waterworks with a large number of tank systems, pumping and pressure boosting stations covers a length of over 6,400 km.
Ecological management by Wassergut Canitz GmbH
In order to protect the groundwater resources, large protected areas have been designated around the plants. All activities that could endanger the groundwater are restricted or prohibited there.
Also for this purpose, the Canitz water estate cultivates a total of 743 hectares under the premise of organic farming. The estate produces organic products without using synthetic chemical fertilizers and pesticides.
Since the introduction of organic farming in the early 1990s, this has made it possible to reduce the nitrate content of 25 milligrams per liter in groundwater, well below the limit of 50 milligrams per liter. This saves considerable energy and cost-intensive treatment processes. Without this, a comparable water quality for Leipzig would cause about seven times the effort.
And the ecological land use has another desirable effect: the preservation of the species-rich and structured landscape. In the Canitzer Agricultural Flood, species that have become very rare such as the partridge are now at home again.
literature
- Helge-Heinz Heinker: Water makes history. 500 years of water supply in Leipzig. 1504-2004. Municipal waterworks Leipzig GmbH, Leipzig 2004
- Adolf Thiem: Groundwater flows. In: Leipzig and its buildings. Edited by the Association of Leipzig Architects and Engineers, JM Gebhardt's Verlag, Leipzig 1892, pp. 21–31
- Adolf Thiem: water supply. In: Leipzig and its buildings. Edited by the Association of Leipzig Architects and Engineers, JM Gebhardt's Verlag, Leipzig 1892, pp. 572-583
- Leipzig Water Competence, Figures 2018, 2018. Published by: Kommunale Wasserwerke Leipzig GmbH, pp. 3–5
- Added value for Leipzig, 2017, publisher: LVV Leipziger Versorgungs- und Verkehrsgesellschaft mbH
Web links
Individual evidence
- ↑ a b Key figures of the Leipzig Group. Section Leipzig waterworks . Retrieved June 14, 2019 .
- ↑ https://www.l.de/gruppe/das-sind-wir/leipziger-gruppe
- ↑ https://www.l.de/wasserwerke/kundenservice/wissenswertes/wasserwerke
- ↑ https://www.l.de/gruppe/das-sind-wir/leipziger-gruppe/wassergut-canitz