Series On Emission Scenario Documents Metalworking Fluids PDF Download

The "TEGEWA MWF Working Group" has agreed to fund a project to investigate the handling and disposal of used water miscible metalworking fluids. The project has been placed with the Fraunhofer Institute for Toxicology and Experimental Medicine (Fraunhofer ITEM). Within this report, the term "water miscible metalworking fluids" (wm mwf) refers to emulsifiable mwf but also water soluble mwf. A third type of metalworking fluids are oils, however, no biocides are needed for these and therefore they are not further discussed in this document. Whereas the previously used EUBEES ESD differentiates between water soluble and emulsifiable mwf, in this document they are usually discussed together, as the amount of water soluble mwf is small compared to emulsions and the resulting waste is mostly treated together with the emulsifiable types.^In order to fulfill EU wide legislation concerning the maximum COD (chemical oxygen demand) and other pollutants the oil content has also to be removed for the soluble types, i.e. although there is no actual emulsion, some kind of splitting procedure has to be in place. Thus, the developed scenarios are able to also cover water soluble mwf as a worst case (see also chapter 4.1.1 and detailed information in Excel tables). The aim / scope of project is to evaluate the available emission scenario documents (EUBEES ESD, OECD ESD No. 28), compare them with actual situations found in industry and other up to date information and to revise the suggested algorithms in order to remove unrealistic assumptions or defaults and obtain a realistic worst case approach to estimate environmental exposure.^In the course of the project different aspects of the environmental exposure to biocides due to use and waste treatment of metalworking fluids have been evaluated in summarised in a number of status reports (see Appendices A-C). It is felt that the information gathered over the last months is now sufficient to derive a reasonable suggestion for a new Emission Scenario Document. This document includes therefore a short summary of the information gathered so far and the resulting scenarios suggested for the environmental exposure assessment for biocides used in metalworking fluids.