Formed sheet membrane element and filtration system

A filtration module comprising (a) a plurality of generally planar membrane devices placed side by side in a bundle but spaced apart by gaps between the membrane devices, each of the plurality of membrane devices comprising (i) two sheets of a substrate material, at least one of the sheets of substrate material having a plurality of depressions extending to an edge of the at least one of the sheets of substrate material, the two sheets of substrate material bonded together along their edges parallel to the plurality of depressions, wherein the plurality of depressions form a plurality of internal channels between the two sheets of substrate material, the plurality of internal channels being open to a first edge of the membrane device and (ii) a filtration membrane material coated on outer surfaces of the membrane device;

• and, (b) a first header having a permeate receptacle, wherein the first edge of each of the plurality of membrane devices is connected to the first header with the plurality of internal channels in communication with the permeate receptacle.