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2020/2021

Rinsing condition optimization of the membrane fouled by yeast suspension

IOP Conference Series: Earth and Environmental Science*, 2021, 647(1): article no. 012164

Author(s)Yangyang Guo,
Zhaoyu Qiao,
Zhan Wang,
Huijia Luo,
Xi Wang
Summary

In order to sufficiently study the effects of stirring speed and temperature on the membrane flux, the flux recovery rate (FRR) and model parameters (k1, k2, k3 and Ri) of the PAN membrane (200kDa) fouled by yeast suspension, a series of rinsing experiments were carried out. Meanwhile, the instantaneous membrane flux was predicted by the rinsing model and corresponding regression equation of model parameters was obtained. The result indicated that the model shows a good agreement (R2>0.9700) and the temperature has a more significant effect on FRR and model parameters (k1, k2, k3 and Ri). FRR increased from 58.40% to 99.41% when the temperature increase from 25°C to 55°C (the rate constant of dissolution increased from 0.00371 m−1 to 0.00531 m−1) while it only increased from 55.67% to 67.50% when the stirring speed increases from 200 rpm to 800 rpm (the rate constant of dissolution increased from 0.00366 m−1 to 0.00456 m−1). In addition, the rinsing condition can be optimized by the combination of the prediction model of flux (equation (1)) and the regression equation (equation (2)) to obtain the optimal cleaning condition.


* Also listed in Scopus.

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