immo!nvest – Die Plattform für Standorte und Immobilien

Tag: Holznutzung

  • How wood can be better utilised

    How wood can be better utilised

    Switzerland is aiming for net zero by 2050. Wood plays a key role in this endeavour. It binds CO₂ from the atmosphere, is versatile and offers sustainable alternatives to fossil fuels. But how much wood is actually available for construction, industry or energy generation? Researchers from Empa and WSL have provided the answers by analysing the material flows of wood in Switzerland in detail for the first time as part of the SCENE project.

    For their analysis, the researchers used data from 21 different sources for the year 2020, from wood harvesting to disposal. “In contrast to other studies, which often only use modelled values, we were able to draw on real data,” explains Nadia Malinverno from Empa. The effort paid off, as the study provides a precise picture of the entire wood flow in Switzerland.

    Recycling potential and the correct use of wood
    Only eight per cent of wood is currently recycled, compared to around 70 per cent for paper. In addition, 40 per cent of the wood harvested each year is used directly as fuel. “This is not ideal from an ecological point of view,” emphasises Claudia Som, co-author of the study. In order for wood to fulfil its role as a CO₂ store, it should be used as a material for as long as possible.

    The researchers’ vision is cascade utilisation
    Here, wood is first processed into durable products such as beams and boards that remain in the construction industry for as long as possible. Only after repeated use is the wood further processed into wood chips or fibres before it is finally burned. “Wood should only be used as an energy source when it is no longer usable as a material,” explains Som.

    The path to sustainable wood flows
    As part of the SCENE project, the researchers want to investigate more closely in future which uses of wood make the most ecological and economic sense. They are focussing on specific material flows. In what form is the wood available? How is it processed? Where is there potential for optimisation?

    “The sustainable use of wood is a key component of the energy transition,” says Malinverno. “Our work shows that Switzerland still has many untapped opportunities here, both in terms of climate protection and resource efficiency.”

  • Researchers analyse wood use in Switzerland

    Researchers analyse wood use in Switzerland

    Researchers from the Swiss Federal Laboratories for Materials Science and Technology(Empa) and the Birmensdorf-based Swiss Federal Institute for Forest, Snow and Landscape Research(WSL) have analysed the use of wood as one of the most important raw materials on the path to a climate-neutral future. According to a press release, the analysis concludes that there is still considerable potential in Switzerland when it comes to the sustainable use of wood. For example, the recycling rate for wood is just under 8 per cent, compared to around 70 per cent for paper.

    “Of the five to seven million cubic metres of wood that we harvest in Switzerland every year, around 40 percent is used directly for energy – in other words, it is burned,” says the lead author of the study, Nadia Malinverno from Empa’s Technology and Society Laboratory. This is by no means ideal, as wood is used in a variety of ways, as raw wood, sawn timber, wood chips, wood fibres for the paper industry and much more.

    Switzerland has set itself the goal of net zero by 2050. Wood is one of the most important raw materials on the road to a climate-neutral future. It binds CO2 from the atmosphere as it grows and offers alternatives to fossil raw materials both as a material and as an energy source, according to the press release published by Empa and WSL. Many branches of industry want to increasingly rely on wood in the future, be it in construction, in the production of textiles and even in sectors such as electronics or pharmaceuticals and chemicals, it continues.

    The work was carried out as part of SCENE(Swiss Centre of Excellence on Net-Zero Emissions), an initiative of the Swiss Federal Institute of Technology in Zurich(ETH).