Browsing by Subject "wood waste"

The first objective of the study was to determine, what kinds of costs are related to the recycling of construction and demolition wood wastes, and how they are distributed among the supply chain. In addition, the objective was to determine, does the price of wood wastes differ, when they are utilized for new products instead of utilizing them in energy production and what is the most potential way of utilizing wood waste chips from a techno-economic perspective. The study was implemented by visiting recycling centres in the Uusimaa region that received wood waste. During the visits wood waste specialists were interviewed at the recycling centres. For conducting information about the possible utilisation options for the wood waste resources, specialists from the subject matter were interviewed. The main purpose of the interviews for the recycling centre was to gather information about the total amount and quality of wood wastes recycled in the Uusimaa region, and to receive information about the cost inquired in the recycling processes. The main purpose for the specialist interviews was to study the different possibilities and constriction in utilizing the heterogeneous wood waste resources. In 2013, the annual production of wood wastes in the Uusimaa region was approximately 185,000 tons. The wood wastes originated mainly from demolition of buildings. The most significant part of the wood waste come to the recycling centre as sorted wood waste from the construction site, while a small proportion comes as mixed construction and demolition waste. Only 33 % of the total amount of wood wastes came as clean wood waste loads, although the total amount of wood waste represented 51 % of clean wood waste. From the total amount of wood wastes, 97.3 % was utilized in energy production in 2013. The average cost for shredding wood wastes was 15.6 €/ton and the average price of wood waste chips was 38.5 €/ton. The objective whereby 70 % of the construction and demolition waste must be recycled by 2020 in Finland will significantly increase the reuse of wastes. The main barriers in reusing wood wastes rise from utilizing painted wood and wood products. The main challenges come from technical and economical issues related in the reuse of these products. Based on the study, wood waste chips produced from construction and demolition wood waste is a potential raw material resource, for example in replacing wood chips from natural forests.