Nyhed
Turning wastewater into a resource
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Nyhed
Turning wastewater into a resource
![](https://prod-aaudxp-cms-001-app.azurewebsites.net/media/d3kptley/skærmbillede-2022-12-09-102344.jpg?width=2)
Turning wastewater into a resource
Nyhed
Nyhed
Associate Professor Cejna Anna Quist-Jensen and her colleagues are currently working on the development of a new type of membrane to purify wastewater and liquid manure. The membrane works as a kind of coffee filter that allows clean water to pass through but catches and aggregates toxic waste materials. Today, membrane technology is used for wastewater treatment and reverse osmosis for desalinating sea water. Cejna Anna Quist-Jensen’s membrane system deviates from this procedure by heating up the wastewater as it passes through the filter.
Today the phosphorous sludge is used as a fertilizer and spread on agricultural fields. The drawback to this process is, that the sludge – because it is not properly purified – may also contain toxic metals and medicine residue that are unwanted.
Since the method of adding heat to the cleansing membrane makes it possible to crystallise phosphorous, it presents the opportunity of utilizing and recycling the phosphorous from farm fertilizers much more efficiently than today- and that holds a series of benefits.
Partly because the phosphorous can be kept out of the aquatic environment, but even more importantly because the world’s supply of phosphorous is running critically low. The phosphorous that is used for farm fertilizers is mined in Morocco, Russia, China, and the USA, but within the next 50 – 100 years the mines will run dry. This means that we are potentially facing a looming food crisis. Phosphorous is vitally essential to plants and animals, but at the same time toxic to biological systems.
This challenge may be solved using the warm membrane technology.