Full structural path analysis (SPA) could also be applied for selected products of particular policy relevance, in order to identify hotspots of material extraction on each layer of the supply chain, for example, with regard to service sectors with important contributions to the overall material footprint.
It is assumed that the development of material extraction and of economic variables is proportional.
The optimum conditions, using the Taguchi method, were obtained as: 1 14 (w/w) solid to water ratio, 25 mm size of the plant material, extraction time of 1.5 h and 500 W power.
As observed in Table 1, during 20 years the initial construction phase (which includes: raw material extraction and production of the finished product) is the largest contributor to GWP, POCP, AP, and EP with respect to the maintenance.
The results showed that extraction temperature, ratio of phosphate buffer to raw material, extraction time, and ratio of trypsinase to raw material were the main four variables that influenced the yields of extracts.
The highest yield was obtained when extraction temperature, ratio of phosphate buffer to raw material, extraction time and ratio of trypsinase to raw material were 40 °C, 2, 5.5 h and 1.6, respectively.
However, for some types of material extraction, estimation techniques need to be applied due to a lack of official statistics.
More than 7 kg of material extraction served as direct and indirect material input to produce one € of final demand of cattle meat.
Four independent variables such as extraction temperature (°C), ratio of water to raw material, extraction time (h), and number of extraction (n) were investigated.
In this article, we present a long-term global material flow dataset covering material extraction, trade, and consumption of 177 individual countries between 1950 and 2010.
