Cleaning Strategies for Flux Recovery of Ultrafiltration Membrane Fouled by Reservoir Water

摘要

Cleaning strategies for algae-fouled ultrafiltration membrane were investigated in pilot-scale experiments. Comparison of five different physical cleaning modes indicated that backwashing followed by forward flushing was more effective for flux recovery, and combining hydraulic cleaning with air sparge could improve the permeate flux recovery percent up to 87.49%. Cleaning frequency should.be taken for the concentration of foulants and cleaning methods. To maximize flux recovery for the algae-fouled membrane, online chemical cleaning was studied, the permeate flux reduced only 537% after over 240h filtration duration.