A filtration module comprises a housing having an inlet and an outlet; a plurality of hollow fiber membranes disposed in the housing, each membrane having a wall and a lumen open to the outlet; a porous shell disposed in the housing and encasing the plurality of hollow fiber membranes, the shell having an opening through which ends of the hollow fiber membranes pass; and a plug in the outlet, the ends of the hollow fiber membranes passing through the plug and the shell ending in the plug. A liquid treatment apparatus comprising the filtration module is also disclosed, as are method for making the filtration module and the liquid treatment apparatus.