Lörick waterworks
The waterworks Lörick is a reserve water works in Düsseldorf area. It is located in the north of Düsseldorf . It is operated by Stadtwerke Düsseldorf . In Lörick, around 364,000 m³ of water are given off each year (as of 1999).
The Lörick waterworks has the task of ensuring the supply of the supply area on the left bank of the Rhine in the northern area of Düsseldorf in the event of incidents.
history
Hydrological investigations carried out in 1911/12 showed excellent water conditions in Lörick . Work on a new pumping station began here in June 1914 . However, the difficulties caused by the First World War prevented the city of Düsseldorf from carrying out the expansion of the plant as planned. At first it was only possible to put a temporary system into operation in the summer of 1916.
The Lörick waterworks was then built from 1923 to 1926. The wells are located 400 m from the banks of the Rhine in a mighty layer of groundwater . In this way, the water quality is not influenced by the water and height of the Rhine.
During the Second World War , the facilities of the Flehe and Am Staad waterworks were badly affected. The factory on the left bank of the Rhine in Loerick had suffered the least. Machine and pump systems were intact and could supply Oberkassel , Heerdt , Lörick and Büderich . However, due to the occupation of the left bank of the Rhine and the demolition of the bridge including the water transport pipe, the supply of the districts on the right bank of the Rhine failed.
Because of the water mix in the wells, the Düsseldorf municipal utilities and the city of Düsseldorf demanded efforts not only for clean Rhine water, but also for clean groundwater. How important this was became apparent in the Lörick waterworks in the 1980s. The waterworks was closed in 1981 due to the pollution of the groundwater by chlorinated hydrocarbons (CHC), which had penetrated the subsoil and the groundwater unnoticed for years in a company. After it had been retrofitted with a treatment system based on the "Düsseldorf process", the source of the pollutants had been tracked and the groundwater had been extensively rehabilitated, the Lörick waterworks was able to go back into operation in 1991.
Today the Lörick waterworks only serves as a reserve waterworks and pumps approx. 364,000 m³ of water for approx. Four weeks a year (as of 1999). There is a pumping station with two raw water pumps. The pumping station in Lörick consists of 8 individual vertical wells that are connected to one another by a siphon pipe.
processing
Real groundwater is pumped. The first stage of the treatment is the aeration through a trickle. The second stage, the activated carbon filtration in a closed construction, grain size: 0.8 - 2.4 mm, area: 10 m², height: 1.5 m, throughput: 100 m³ / h. (Formerly the third stage disinfection with chlorine dioxide : 0.1 g / m³.) (As of 2016).
Coverage area
The drinking water supply area of the Düsseldorf waterworks comprises 600,000 people, trade and industry in Düsseldorf, Erkrath and Mettmann . In total, around 50 million cubic meters (m³) of drinking water are distributed in one year, which is an average of 140,000 cubic meters - 140 million liters per day. The daily charge varies between 120,000 cubic meters in winter and up to 250,000 cubic meters on a hot summer day.
Web links
- From raindrops to the tap
- Drinking water treatment & supply
- Current drinking water analysis by Stadtwerke Düsseldorf
Individual evidence
- ↑ a b Rüdiger Furrer, Michael Fleig and Heinz-Jürgen Brauch: Water pumping and treatment in the Rhine catchment area - IAWR. (PDF; 2.7 MB) (No longer available online.) Archived from the original on March 11, 2014 ; accessed on March 11, 2014 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Düsseldorf Environment Agency - PDF brochure: Düsseldorf Wasser. (PDF; 2.4 MB) Retrieved September 18, 2013 .
- ↑ Stadtwerke Düsseldorf: Clearly drinking water - basic material of life. (PDF) Retrieved September 26, 2016 .
Coordinates: 51 ° 14 ′ 50 ″ N , 6 ° 44 ′ 23 ″ E