A sign of the times is therefore the bet Ragnsells now doing in Norrköping “dump” at Häradsudden. At the turn took over the plant from Econova and already has initial investment of 15 million is in place. Before the year is out, it may be another 10 million. But even later, new investments be made and in a few years there will be a whole new recycling plant taking shape. Then maybe up to 30 employees working there against 15 today. Ragnsells themselves call it Häradsudden 2.0.
– Here perhaps are both a phosphorus factory, a unique plant for food waste and a facility that treats and purifies contaminated soils, says site manager Erik Gustafsson.
Until further notice, it is sufficient environmental permits available for the plant, but ultimately the company will apply for a new permit for the development of the different ideas that exist for the area.
– Among other things, we plan to build our new landfill in the rock quarry that Skanska leases today. Whereupon they charge mountain, we will grow with the landfill in the quarry. But then a new authorization, says Erik Gustafsson.
Ragnsells has plans to receive sewage sludge from the treatment plants and industrial sludge. Some of the plant’s unused surface area to be used for the storage and treatment of the sludge. Right now an advanced research in Ragnsells where the goal is to extract 100 per cent pure phosphorus from the sludge. And Erik Gustafsson hope that a future plant should be placed on Häradsudden.
Product Manager Cecilia Ekvall on Ragnsells in Stockholm says that they are now ready to try the method on a full scale. So far there have been attempts on a small scale but she believes that the method is verified so that it is now time to plan the next steps:
– We burn sewage sludge and then picked it completely clean phosphorus out of the ashes. Parallel mined gypsum and precipitation chemicals from the sludge. The rest is then laid on the landfill for which there are metals such as cadmium, says Cecilia Ekvall. She does not think Häradsudden is current for the investments now to be made with a full-scale project even if no decision is inclusive. But the future is every chance because sewage sludge produced everywhere.
Every year used in Swedish agriculture about 10 000 tonnes of phosphorus in the form of mineral fertilizer.
In the sewage sludge produced in Sweden each year there are about 6000 tonnes of phosphorus. The phosphorus amount can therefore by this method extracted from the ashes, and then returned to agricultural land.
On the field at Häradsudden already has four high green colored new silos built up, a mixing station for ashes.
– We accept the non-hazardous waste from Händelöverket works. The rest stores Eon in their own caverns. The ash comes in tankers, as thoughts of using the compressors into the silo. Where the ashes are then processed in different ways depending on use. For example, a product can be used to stabilize arsenic in contaminated soils. This is a method that we have patents on and under which the arsenic then do not leach out and flows into our waterways, says Erik Gustafsson.
Contaminated soils is something that Ragnsells want to specialize in the Häradsudden.
– We have developed a method to clean the contaminated soil so that certain hazardous substances decreases or disappears from the soils. For this a specially manufactured acidogent leachate (i.e. acidic water) to wash the soil with. Then soils, for example, be used as the final cover material on landfills, says Erik Gustafsson.
Last year, told NT that Häradsudden can become the first in Europe with a unique facility that allows the maggots take care of the Swedish food waste. When they finished eating and become big and fat, they become animal feed.
– The researchers believe that it is now ready to take the next step and build a demonstration plant. Yet it has not happened anything concrete on this front. But when the technology is fully developed, we hope for a plant here, says Erik Gustafsson.
The need for animal feed, which is not based on the controversial and contested the ingredients of soy protein and fish meal, is wide across the globe. On the Swedish Agricultural University (SLU) in Uppsala, who developed the technique, it is believed that this could revolutionize the entire recycling industry, not only in Sweden but all over the world. Before production can begin in full scale required, however, only a decision of the Land and Environment Court.
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