Biomass membrane contactor

An assembly, comprising:

• a housing comprising a first layer and a second layer opposite the first layer, wherein the first layer and the second layer are spaced apart to define a confined interior space between the first and the second layers,
• a semi-permeable membrane attached to the first layer, the semi-permeable membrane covering a porous membrane area portion of the first layer,
• an outlet port and an inlet port in fluid communication with the interior space,
• first means for circulating a first fluid between the outlet port and the inlet port, and
• second means for circulating a second fluid along an exterior surface of the semi-permeable membrane, wherein the second means comprises a fluid duct attached to or integrated within the housing,
• baffles arranged in the interior space to produce a serpentine fluid flow path through the interior space,
• wherein the semi-permeable membrane forms a barrier allowing for exchange of compounds across the semi-permeable membrane,
• wherein the fluid duct is isolated from the interior space and is porous to provide fluid access to an exterior surface of the semi-permeable membrane.