We claim the ornamental design for a membrane filtration module, as shown and described.
FIG. 1 is an isometric view of a first embodiment;
FIG. 2 is a side elevation view of a first embodiment;
FIG. 3 is a front elevation view of a first embodiment;
FIG. 4 is a plan view from the top of a first embodiment;
FIG. 5 is a plan view from the bottom of a first embodiment;
FIG. 6 is an isometric view of a second embodiment;
FIG. 7 is a side elevation view of a second embodiment;
FIG. 8 is a front elevation view of a second embodiment;
FIG. 9 is a plan view from the top of a second embodiment; and,
FIG. 10 is a plan view from the bottom of a second embodiment.
The membrane filtration module is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design. The dot-dash lines shown in FIGS. 3-5 and FIGS. 8-10 indicate a boundary and form no part of the claimed design.