CMF-20 tubular membrane module

Features：

◆The special WIT-m membrane operation system, combining micro-flocculation, microfiltration and pulse back-washing system, completely solve the blocking problem of microfiltrations, ensuring the long-term stability;

◆The combined pulse backwashing system is applied. It is a taboo that compressed are directly contacts the membrane for back-washing. WIT-m membranes are allowed to apply pulsed compressed air (≤0.45 MPa) for back-washing, breaking though the taboo theoretical and practically. The backwashing lasts 92 s, and the ratio of filtration time to back-washing time is 16:1. The membrane flux recovery performance is beyond the water back-washing;

◆Chemical enhanced back-washing, applied per 15-20 normal back-washing cycles, can recover the membrane flux efficiently and minimize the chemical cleaning cycles, but it requires soaking the membranes in the chemical solution for 15 min before back-washing;

◆Due to the lower cross-flow rates (0.5-1.0 m/s) of WIT-m membrane module, the required electricity is only 0.16-0.32 W/ton water. Other similar membrane systems adopting higher cross-flow rates (3-5 m/s) cost 3-5 W/ton water;

◆The fluxes of WIT-m tubular membranes are in MF range, but the permeate turbidity is similar to that of UF permeates.