Recycling of residues from drinking water treatment | Knowledge Hub | Circle Economy Foundation
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Business case
Recycling of residues from drinking water treatment
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During a pilot study to decolour drinking water, Vitens discovered that the perceived waste stream removed actually contained humic acids and table salt. Vitens searched for a method to reduce the residual as much as possible and strive for a Zero Liquid Discharge (ZLD) operations. An extensive market scan showed that humic acids are valuable substances, with different market applications in agriculture and horticulture fertilizer, plant breeding and even as a supplement for animal nutrition.

Outcome

The installation at Spannenburg will process the total residual of 4,100 m3 into 810 m3 per year. This residual comprises of less than 0.25% salt and 20% humic acid.

Relevant links
Organisations
Vitens
Vitens
Location
Key elements of the circular economy
Impacts
Industries