Use: after the raw water by dosing coagulants should be instantaneous mixing immediately (about 10-20s) coagulant dispersed into the water, this is called a hybrid. Mixing equipment: water pump impellers, pressure pipe, diffusion, drop pipe static mixer or mortar mixers, and so on. Pipe hydraulic up static mixer is relying on its own purpose. General velocity in pipe for 1M/s, 1-4 a triage unit. Mainly suitable for smaller flow of water treatment plants.