Hi, everyone. Again....I meet some problem in my work. My boss want to reduce the exhaust soots from a Euro 0/1 engine. Here is the problem: 1. If I use conventional DPF, how can i know the radius and the length of the DPF filter required for the engine? (The exhaust gas CFM is known) 2. If I cannot use DPF due to buget, can i use a wet centrifugal scrubber to remove the soot? (Wiki said scrubber can remove 1um's particulate efficiently, is it ture?) 3. Is there any equation for me to use to design the wet scrubber? (any existing webpage?) The only objective is to make the smoke looks cleaner (only the visiabiliy). Thank you very much for your help.