The database gives the weighted averages of the inputs into and outputs from the sites per tonne net saleable product (paper and corrugated board) for 2014 from the participating paper mills and corrugated board plants. Annual inputs and outputs include periods of shut down, so these periods are included in the figures per tonne net saleable paper.
It is important to understand that the figures do not represent a certain mill with a certain technology. On the contrary the figures represent a “virtual mill” utilising different technologies.
The technology which is applied in the participating paper mills and corrugated board plants is not the same.
For example: not all mills use a combined heat power generation, wastewater treatment is not always internal, a large variety of additives is used. In some cases this leads to a large variation of inputs and outputs between the mills. Also different inputs and outputs are strongly interrelated, so a mill can be high in one input compared to the others but low in another input, but a mill cannot be low or high for both. Therefore no range of the data is given to prevent studies from being made using a false combination of highest and lowest data.
Because of confidentiality requirements by the mills it is not possible to split inputs and outputs to data per country. Weighted averages of different technologies are not so meaningful, but also for confidentiality reasons a split in applied technologies was not possible.
Details are given in the following paragraphs of this chapter. When there is no technical reason for differences between Wellenstoff and Testliner, the weighted average of the data for both grades has been reported.
A few of the requested data could not be supplied by all the participants. In this case the weighted average may not be representative, because it is based on a limited number of data. They are marked with an *