Trickling (water technology)
In wastewater disposal and agriculture, trickling is understood as the regulated introduction of water into the soil; in drinking water production, it is part of water treatment .
Sewage engineering
In wastewater technology , one speaks of trickling when the wastewater is allowed to seep into the subsoil in a controlled manner for cleaning (compare rainwater seepage ). Here, limited bodies of soil, the so-called sewage fields , are irrigated with the wastewater that has previously been mechanically pre-cleaned in a settling basin. While the wastewater seeps into the ground, its organic constituents are broken down through biological processes (see sewage treatment plant ). The germ content is also significantly reduced and, with a suitable design, the nitrogen contained in the wastewater is nitrified .
The aim is to achieve a quality of the wastewater that allows further infiltration into the subsoil and thus into the groundwater .
The sewage irrigation is mostly used today in small wastewater treatment plants in regions where there is no surface water available as receiving waters for receiving the treated sewage.
Agriculture
In agriculture, on the other hand, trickling usually means the artificial irrigation of sloping surfaces in order to increase the production of crops ; fresh water is usually used for this.
Drinking water production
The trickling of pumped raw water from wells is used to supply oxygen, which means that iron and manganese ions can be filtered out after they have been oxidized .
literature
- Springer Umweltlexikon , p. 40, wastewater trickling
Individual evidence
- ↑ Bürstadt waterworks. (PDF) In: grundwasser-online.de. Retrieved November 17, 2014 .