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From Christmas tree to biofuel

Save a thought for the millions of Christmas trees which are discarded each year after the festivities. When not just thrown into landfill or carelessly left to wither on the roadside, these are often recycled for compost. However, as DSM, the global Life Sciences and Materials Sciences company reveals, there are other ways in which this annual abundance of green waste may be put to use in the near future – by powering our cars….

  • The average Christmas tree, weighing in at approximately 10 kilos, will produce 7kg of sugar. Using a process called “Second Generation White Biotechnology” this sugar could potentially be converted into four litres of ethanol.
  • 20 litres of ethanol - the equivalent of five Christmas trees - could power a car for 200 kilometres or 124 miles.
  • In the UK, 8 million real Christmas trees will be sold this year. If all these trees were recycled to make ethanol 198,400,000 miles could be driven – that’s the equivalent of driving around the world 7,967 times.
  • In Germany, around 28 million real Christmas trees are sold each year. If all the Christmas trees in Germany were recycled to make ethanol 1,120,000,000 kilometres could be driven – that’s the equivalent of driving around the world 27,947 times.
  • In the Netherlands, around 2.5 million real Christmas trees are sold every year. If all the Christmas Trees in the Netherlands were recycled to make ethanol 120,000,000 kilometres could be driven – that’s the equivalent of driving around the world 2,994 times.
  • 30 million real Christmas Trees are sold each year in the US. If all the Christmas Trees in the US were recycled to make ethanol 1,200,000,000 kilometres could be driven – that’s the equivalent of driving around the world 29,943 times.

What is White Biotechnology?
White Biotechnology – also known as Industrial Biotech - is the use of living cells and their enzymes to create industrially useful products from renewable resources. Sometimes these products are simply enzymes that can replace chemicals in various industrial processes. In other cases, the product is something that is traditionally made using fossil fuels, such as plastics and other polymers.

White biotechnology processes are more environmentally sustainable because they typically use less energy and create less waste or because the products are more biodegradable than the traditional industrial chemicals they replace. This reduces their environmental impact on the planet.

How could DSM help turn Christmas trees into car fuel?
A vitally important area for DSM is the use of white biotechnology as a platform for the development of what is known as second generation biofuels, biochemicals and biopolymers.

DSM is working to create practical solutions for the biorefineries of the future, using sources that are not in conflict with food and feed supplies. This route is referred to as ”Second Generation Biotechnology”. At the present time, micro-organisms can be grown only on the basis of sugar or starch (from corn cobs, for example). This is known as “First Generation Biotechnology”. In the longer term, large-scale use of these sources could lead to scarcity in the global food market.

To get from “First Generation” to “Second Generation”, we need to find ways of recovering sugars from what is currently disposed of as agricultural waste (hence the example of Christmas trees we have used here ) and then train micro-organisms to eat the sugars extracted from this waste.

While the extraction of these sugars has been successfully trialed at lab scale, we estimate that it will take another two to three years before production on industrial scale is practicable. DSM is investing significantly to advance “Second Generation” technology.

Christmas trees – did you know….?

  • It has been estimated that approximately 200 million Christmas trees are bought each year worldwide.
  • More than 65 million Christmas trees are sold in Europe each year.
  • The numerous Christmas tree recycling programs available globally – there are more than 4000 programs in the US alone - are almost exclusively designed to turn discarded trees into compost.
  • Of the 8 million real Christmas trees sold in the UK this year, approximately 4 million are expected to be recycled for compost.
  • In the UK, around 25,000 hectares of Christmas trees are currently grown - that's over twice the size of the City of Manchester.
  • In the UK, sales of rooted Christmas trees have grown a thousandfold in five years.
  • In the US, around 93% of real Christmas trees are recycled for compost each year.
  • Meanwhile, sales of artificial trees in the US have nearly doubled from 2005 (9.3 million) to 2007 (17.4 million).
  • In the Netherlands, many of the discarded Christmas trees that are collected are burned in special ovens and this creates harmful greenhouse gas emissions.

Background to White Biotechnology
Soaring energy prices, concerns about climate change, and escalating fossil fuel-based raw material costs have fostered increased interest in White Biotechnology. Activities and opportunities in this field – replacing conventional chemical processes – are rapidly growing due to recent technology breakthroughs and increasing awareness of the advantages in terms of costs and environmental impact. Promises are becoming reality and biotechnology is today increasingly applied in the search for bio-based products.

The use of low-value biomass (such as switchgrass and corn stover) as feedstocks will facilitate the cost-effective operation of large-scale biorefineries to meet growing commercial demand for biofuels, bio-based chemicals and other bio-derived end products. This will increase energy independence, reduce carbon emissions, and transform the chemical manufacturing industry in a responsible and sustainable manner. White Biotechnology is one of DSM’s key Emerging Business Areas.

In 2008 DSM received a grant from the US Department of Energy for biotechnology research. The grant will fund an extensive enzyme development program which focuses on finding applications in cellulose-based biorefineries for the production of bio-based products, including ”Second Generation”  biofuels. The research will be carried out by a technical consortium in which DSM will be the lead partner.

Early September 2008, DSM was again named as one of the global sector leaders in SHE and sustainability in the Dow Jones Sustainability Index (SAM). DSM actively pursues its sustainability strategy in the context of its Triple P approach, focusing on opportunities and providing sustainable solutions to its customers. One of the spearheads with regard to DSM’s Triple P policy is the drive towards further developments of white biotech, industrial production with fermentation based processes involving micro-organisms and enzymes.

The wider market
According to McKinsey’s expectations a total of EUR 170 (USD 250) billion in chemicals sales, being 10% of all chemical sales, will be bio-dependent in 2010/2011. Currently, some 20% of DSM’s sales are related to biotechnology.

The estimated market size for ethanol in 2010 is USD 50 billion. The enzyme, yeast and other micro-organism part for this market is estimated to be above USD 0.5 billion in 2010, with rapid growth thereafter for the second generation process.

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