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AUGUST 2013 Issue 5 Vol. 22 • P: (03) 9888 4834 • E: l.martin@ryanmediapl.com.au • www.timberbiz.com.au
Out of the ashes By Mandy Parry-Jones
L
IKE THE phoenix rising from the ashes, the Tasmania forest industry has the opportunity to look forward and improve its future following the Tasmanian Forestry Agreement. Andreas Rothe has been preparing the state, and the country for a good news story with his appraisal of the biomass potential of Tasmania. Now it’s time for government, industry and the public to listen, learn and take action.
The author Andreas Rothe, or more precisely Dr Rothe, is a professor who teaches applied forest ecology and environmental resource management in his native Germany at the University of Applied Sciences Weihenstephan. This is the largest forestry school at bachelor level in Germany, and together with other institutions forms the Centre of Forestry Weihenstephan, which is the biggest forestry research centre in Germany with a staff of around 400. Before joining the university Rothe worked for Forestry Bavaria for 15 years and worked in native forest silviculture with Forestry Tasmania in 2004.
Andreas Rothe.
Rothe spent his sabbatical leave this year based at Forestry Tasmania comparing Tasmanian use of forest residues and low quality timber with those of Europe and in detail with his home state of Bavaria. “I’ve been working here in 2004 so I had in mind that a huge amount of residues was burnt in the open and I had in mind that a big part of which was exported to China and since the price for energy has picked up a lot in Europe I decided to do this project,” said Rothe.
The project According to the project background, in contrast to many countries in Europe, the use of
forest biomass as a renewable energy source is minimal in Tasmania and Australia. A lack of understanding and acceptance among important stakeholders has been identified as the major constraint. The aim of Rothe’s project is to analyse current use and future potential of forest biomass in Tasmania and compare that with the present situation in Europe. Bavaria, a southwest state of Germany, was used since its total area of 7.5 million hectares, its forest area of 2.5 million hectares and public forest management structure with 0.8 million hectares of state forests is similar to that in Tasmania. “Certainly it was an important issue that Tasmania compares very well to Bavaria which is my home state and so I have access to the data at home, and it makes a very nice comparison,” Rothe said. The use of forest biomass for energy is a widespread practice in Germany and around 50% of this is directly harvested from forests and 50% comes from secondary sources, mainly wood processing residues and waste wood. Although forest type and markets are different, this figure indicates a future potential for forest biomass as an energy source in Tasmania. “This (project) was started in February for approximately six months,” said Rothe. “Tasmania provided the infrastructure.” “I co-operated with a lot of people in Tasmania starting from the forest industry, forest growers, to government agencies like the Environment Protection Agency … they included private forest, they included state forest and I was in contact with the NGOs like the Wilderness Society to hear their perspective on forest biomass energy.” The main aim of the project was to quantify the potential of forest biomass for energy in Tasmania for the next three years. “I did a short term supply estimate; most of estimates they work on very long terms like 20 years or 30 years but I decided to really use or look at the next three years because in Tasmania - the next three years is a minimum supply and you get much more reliable figures instead of long term studies with lots of uncertainties,” explained Rothe. The estimate is conservative, excluding residues from old growth logging and considering environmental issues like coarse woody debris (CWD) and nutrient sustainability.
New opportunity Examples from Europe indicate that biomass for energy production can be a new business field for the forest industry in Australia and particularly for Tasmania. The market value of forest biomass in Germany alone is more than $1 billion. The use of forest biomass requires consideration of many technical, economic and social aspects, which are beyond the scope of the project. The results of the project are intended to be a basis for further studies on economic viability and on the technical aspects of harvesting (processing, transporting) and use (pelleting, firewood, electricity and/or heating plants) of forest biomass. It is also a springboard to stir the government into making suitable political decisions and to create social acceptance and legitimacy for forest biomass. “All the renewable energies depend to some stage on support from the government,” said Rothe. “And that’s definitely the case that biomass gets much more big support in Europe than in Australia. “Germany is very forward economically in alternative power sources. We have very ambitious targets until 2020 and 2050 to reach for renewable energies, and biomass is a part of this. “Australia isn’t [in the same position] because of other options such as coal. [Now] Australia is also thinking much more than in the past about renewable energies. Biomass, for whatever reason, doesn’t seem to be as important in Australia, or is not considered as much as it is in Europe.”
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Put residues to use The study looked only at second and third growth harvesting operations due to the low social acceptance of old growth harvesting for commodity products. Available harvesting residue volumes were estimated for major forest types including restrictions to manage for nutrient sustainability, CWD management and operational aspects. All public and private forests available for harvesting were included as well as hardwood and softwood plantations. Biomass potential was estimated using current sawlog recovery and including restrictions to manage for nutrient sustainability. All residues from professional wood processing activities were also included. continued on page 4.
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