A fluid processing assembly comprises a lumen for receiving at least one inlet stream and dispensing a primary product stream, and an energizing device for supplying energy to an energizable portion of the lumen. A primary product collection assembly is in fluid communication with the lumen for receiving the primary product stream. The energizable portion is positioned exterior to the primary product collection assembly. A pressurized gas source is downstream of the lumen. The pressurized gas source supplies pressurized gas to the primary product collection assembly for pressurizing at least a portion of the primary product collection assembly and the lumen.
