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. 2019 Mar 28;9(4):45. doi: 10.3390/membranes9040045

Figure 3.

Figure 3

The lignosulfonate retention is dependent on transmembrane pressure during the filtration of spent sulfite liquor at different Reynolds numbers. (a) 3-nm ceramic hollow fiber membrane. (b) 8-nm ceramic hollow fiber membrane. (c) 30-nm ceramic hollow fiber membrane. (d) 20-kDa tubular ceramic membrane.