Ragn-Sells and C-Green collaborate on circular sludge management
C-Green and the environmental company Ragn-Sells, one of Sweden's largest sludge handlers, have signed a cooperation agreement with the goal of establishing 8–10 C-Green biorefineries in the coming years. The first facility will be located outside Norrköping and become operational in 2023, a project that is partly financed by the Swedish Energy Agency with about SEK 40 million.
Today, about one third of Sweden's sewage sludge is spread on arable land, to recover the vital phosphorus and nitrogen found in the sludge. To recover the phosphorus from the remaining two-thirds, the sludge must be incinerated. C-Green's technology uses hydrothermal carbonization (HTC) in a sustainable and energy-efficient way to convert sludge into hydrochar, which can then be used as biofuel. The resulting ash can be processed using Ragn-Sell's Ash2Phos technology to extract phosphorus and other substances from the ash. C-Green's technology also enables the recovery of the nitrogen from the sludge.
- If we are serious about creating a sustainable society, we must use the raw materials that we already have, over and over again. That is why we look forward to the collaboration with C-Green and to combining their technology with our other processes enabling us to capture vital nutrients such as phosphorus from even more sewage sludge, says Jonas Wibom, business development manager at Ragn-Sells.