The QDTM type submersible impeller is developed by our company, suitable for process of water treatment fluidized bed biofilm reactor (referred to as the MBBR process). The new impeller can promote the flow of water containing suspended filler biochemical reaction tank, and make Biofilm fluidized suspension. Appearance-Streamlined product design reduces the wear and tear between the packing and the equipment to the maximum, and improves the operating efficiency. Structure-High efficiency submersible motor, built in integrated planetary deceleration mechanism, stable work, long running life, high transmission efficiency. Install-The adjustable mounting angle (15 °, 22 °, 30 °) action machine is specially designed for biofilm reactor technology, to meet the bioreactor excellent overall flow state and effectively improve the efficiency of the reaction.