Report – ENVR206B – Alternative Use – Another Glimps from Sweden

BIOWASTE – ALTERNATIVE USE ANOTHER GLIMPS FROM SWEDEN

Stefan Martensson C0347318                                                              2009-11-03

Background Info:
I have grown to understand that Sweden is in the forefront of the environmental research and its implementation in the real world.

My home town, Helsingborg, was awarded ‘The Most Environmental Municipality in Sweden” this year (out of 290 municipalities). Some of the reasons to the award were:

  • Construction of 60 wetlands to help in a natural way of remediate high nutrient readings in creeks and rivers.
  • Bike and pedestrian pathways have been higly prioritised while new planning and construction of new and old areas been conducted.
  • Breakfast meetings with the industry were the municipality brings up current environmental issues and new by-laws. Education in climate issues and biogas have been offered.
  • Lastly, biogas is produced locally by the company NSR at the landfill. This is the part I’m going to elaborate on further.

NSR – A success story

NSR (Nordvästra Skånes Renhållnings AB) started to recover methane gas at the landfill as early as the middle of 1980’s. The first biogas production plant was built 1996 and has led biogas research in not only Sweden but Europe as well since then.

Basically NSR is collecting substrate from organic waste both from food industry and domestic refuse but also swine manure is added as a bio fertilizer. The waste is pumped into an area where it is heated to kill any miscellaneous bacteria that might be harmful. Even the heat from this process is produced from bio-alternatives.

The bio-fertilizers and fermented manure is high of nitrogen and phosphorous is pumped out to farmers in the area through a pipeline and eliminating the need of transport (saving of 550 truck transports/year or 35tonnes of CO2).

The biogas (about 75% methane and 25% carbon dioxide), is then pumped through different systems to become enriched to 98% Methane so it can be used in vehicles. It’s later stored in a high pressure storage facility for later transport to the biogas refuelling station. The landfill collection trucks are all run on this biogas, the city’s 71 intercity busses and 25 regional busses are all also fuelled by this biogas.

http://www.nsr.se/Files/Billeder/Om%20NSR/nsr4.swf

From the landfill there are more than organic waste, but some of the other waste also produce gases while it’s broken down. Unfortunately, most of these gases contains about 50% methane, and the rest CO2 and NO2. Due to the nitricoxid NSR can’t use it for enrichment to vehicle biogas so another company, Öresundskraft, purchases the gas and fuels a combined power and heating plant where electricity and district heating is produced which in turn is distributed out around the region. http://www.nsr.se/Default.aspx?ID=97

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