DIN Forsyning technology solves excess sludge issue

摘要

Anew pyrolysis-based treatment solution has been developed to combat excess sludge from wastewater treatment and digestate from biogas production,which is utilised as farming fertiliser for its phosphorous content-and which may also contain harmful PFAS.Danish district heating company DIN Forsyning operates 16 treatment plants in two local municipalities.In total,these treat about 22 million m~3 of wastewater each year,according to the company.In the treatment process,15,000 tons of excess sludge with high phosphorus content is produced,and its high nutrient value makes it a valuable fertiliser for agriculture.The company said there is a high risk that the sludge contains harmful environmental contaminants like PFAS that pollute the soil and groundwater-adding to the agricultural industry's CO2-emissions.