|
Sweden was one of the first countries in the world to use household waste (MSW) as a source of energy and the Swedish environmental regulation was for a long time the strictest in the field of waste incineration.When the EU Directive 2000/76/EC cont. was taken into effect (2002 & 2005) the EU and its member countries has adapted the strict environmental regulation. Today all facilities operate in EU according to it.
EE designs its facilities with a high ambition regarding a low O & M cost and with emission values that falls below regulated values by more than 10%.
Emissions from MSW incineration (maximum levels)
Sweden is in the WtE & waste management forefront. Currently there are 31 WtE facilities in operation in Sweden today that treat approximate 2.29 million tons of MSW per year & 2.27 million tons of industrial waste (a total of 4.73 million tons).
The residues from the facility consist of incombustibles like slag, scrap iron and fly ash. Incombustibles of larger dimensions may occur in the fuel. These can be removed with the crane grab or be weeded out with a picking crane from the charging hopper. The incombustibles are then transported to recycling.
After slaking, the slag is either transported to slag storage or conveyed to a silo where excess water is removed and recycled. If needed, scrap iron is thereafter separated from the slag with a magnetic separator. The scrap iron is then melted and recycled and the remaining slag is reprocessed. The slag can possibly be used for road constructions at landfill sites.
Fly ash from the boiler and residues from the bag filter are stored in the fly ash silo. The mixture then has to be treated in a secure way.
The fly ash can also be moisturized with only water at the facility and then transported to the landfill. In this case the fly ash are emptied dry from the silo and are moisturized at a moisturized station and then loaded to trucks for transportation to the landfill.
|
