Division 12

BAT for waste water management is to prevent, collect and separate waste water types, maximising internal recycling and using an adequate treatment for each final flow. This includes techniques utilising, e.g. oil interceptors, filtration or sedimentation. In this context, the following techniques can be used where the prerequisites mentioned are present:

• avoiding the use of potable water for production lines

• increasing the number and/or capacity of water circulating systems when building new plants or modernising/revamping existing plants

• centralising the distribution of incoming fresh water

• using the water in cascades until single parameters reach their legal or technical limits

• using the water in other plants if only single parameters of the water are affected and further usage is possible

• keeping treated and untreated waste water separated; by this measure it is possible to dispose of waste water in different ways at a reasonable cost

• using rainwater whenever possible.