(best examples and good practices) on household organic waste ...

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distributed either through gas pipe or by vehicles with swapbody units. From
Henriksdal there is one gas pipe providing the local transport buses <strong>and</strong> one
providing a public refueling station at Hammarby Sjöstad. The distribution to
the fast-filling bus depot is made by SL, Stockholm Transport, <strong>and</strong> to
Hammarby Sjöstad by the energy company Fortum. At Hammarby Sjöstad, the
gas from Henriksdal is used for residential cookers as well. (Chemical
Engineering <strong>and</strong> Technology department KTH., 2007)
The remaining gas is purchased by the company AGA, <strong>and</strong> distributed by
vehicles to the public refueling stations within Stockholm County. There are as
mentioned 11 public refueling stations <strong>and</strong> 3 to be built in 2007 within the
region. In addition, there are 3 refueling stations used only by the producers
themselves, for their service vehicles. The production plant at Bromma has one
public refueling station, which is provided by a gas pipe, although most of the
gas is distributed by vehicles. Practically all gas produced at Bromma is
purchased <strong>and</strong> distributed by AGA.
Some of the biogas supplying the public refueling stations in Stockholm is
imported from Linköping <strong>and</strong> Västerås. The quality of the digestion residue is,
according to (2005) environmental report, sufficient for use in the agriculture.
But still, practically the entire amount of residue, 69 000 tones, was used for
after-treatment at mines, whereas 3000 tones was used as fertilizer on arable
l<strong>and</strong>, in 200519. The residue can also be used for end covering of l<strong>and</strong>fills.
(Chemical Engineering <strong>and</strong> Technology department KTH., 2007)
Municipal organic waste separation
The municipal organic waste separation for households is voluntary <strong>and</strong> it is up
to each household if they want to have the special containers <strong>and</strong> bags for the
organic waste. If you decide to receive the service you will have a special
container, bags made of cornstarch <strong>and</strong> a bag holder delivered to you. The food
waste is then placed in the bags, which are placed inside the special container.
The waste is picked up every 14 day by a particular vehicle, which transports the
organic waste to a treatment plant in Huddinge, south of Stockholm. The plant
is a composting plant <strong>and</strong> the waste is turned into soil. The bags made of
cornstarch cannot be digested, consequently they have to be specially treated,
or replaced by another type, before a future digestion process is possible. This
kind of separation is only made to a very limited extent.