Bevor Abwasser in der Kläranlage gereinigt werden kann, muss es gesammelt und transportiert werden. Dies geschieht über ein weit verzweigtes Kanalnetz mit Nebensammlern, Hauptsammlern und Pumpwerken. Für die Regenwasserbehandlung sind zusätzliche Anlagen im Kanalnetz vorhanden. Rund 102.500 Einwohner aus dem Stadtgebiet sowie aus Ergolding, Altdorf, Furth (Ortsteil Arth) und Kumhausen sind an das Landshuter Kanalnetz angeschlossen.
It counts for kilometers about as much as the distance from Landshut to Bolzano: around 370 kilometers of sewer pipes are located under the urban roads and paths. The largest part are so-called mixed water channels (206 km). In them, the dirt and rain water runs to the sewage treatment plant in Landshut-Dirnau, where it is purified and returned to the natural cycle via the Isar River.
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Causes of odors from the canal
Unfortunately unpleasant odors in the channel can not be avoided. But sometimes it comes to massive odor nuisance outside the channel. This may be due to the fact that the water consumption is continuously decreasing, which also causes less sewage to flow in the sewers. Due to the low flow rate, sludge settles faster and the decay processes lead to odor nuisance. This process is exacerbated by high temperatures and longer droughts in summer.
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Occasionally it also leads to unauthorized discharges into the sewer system, which favor the formation of foul-smelling gases. Another cause is channel blockages.
What countermeasures are taken by public utilities?
The sewer system of the city of Landshut is regularly cleaned by Stadtwerke Landshut with special vehicles. At the points of the sewer system where regular flushing is not enough, we install odor traps, artificial ventilation, filter systems or seal the drainage cover odor-tight. In addition, we monitor the discharges into our sewer system and regularly take wastewater samples, which we analyze in our sewage treatment laboratory.
If there are massive odor problems from the sewer over a longer period of time, please contact the Wastewater Department of Stadtwerke - by phone at 0871 1436 2503 or by e-mail firstname.lastname@example.org.
The public sewer system of Landshut with a total length of more than 370 km must be cleaned regularly. Otherwise it can lead to deposits and as a result to unpleasant smells and blockages. It thus ensures the dewatering comfort of the inhabitants, but also contributes significantly to the value retention of the sewer network.