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Factors Affecting Membrane Flux
- Aug 24, 2018 -

Factors affecting membrane flux

1. Influence of sludge concentration on membrane flux

Sludge concentration (MLSS) is one of the important factors affecting membrane flux. The high MLSS can guarantee the effluent quality at the peak of the organic load, and the sludge can be self-digested (endogenous respiration) during the low peak period. Increasing sludge concentration will lead to an increase in sludge viscosity and a decrease in flux, which will hinder the conversion of oxygen, thereby affecting the fluidity and separation performance of the sludge. It was found in the experiment that the membrane flux has a linear relationship with the sludge concentration: J = 14.44 MLSS + 215.56.

2. Effect of membrane surface flow rate on membrane flux

The membrane surface flow rate increases the membrane surface flow rate for membrane flux, which can reduce the thickness of the gel layer caused by concentration polarization, thereby reducing the membrane filtration resistance, delaying and preventing membrane clogging, and maintaining A stable membrane flux. It can be seen from the figure that the membrane flux does not increase rapidly with the rapid increase of the membrane surface flow rate, but tends to be gentle later, and it can be seen that the membrane surface flow rate is not as high as possible. Therefore, in operation, all aspects of energy consumption and other factors should be considered and optimized.