A modular production system including a plurality of production modules connected in a linear series to form a production tunnel, and collectively defining a production channel, and wherein at least one fluid inlet port defined along the production tunnel, said inlet port is in fluid communication with a pressurized fluid source, whereby influx of fluid from said fluid source through said fluid inlet port acts to maintain the fluid pressure within the production channel at a higher pressure than the atmospheric pressure outside of the production tunnel; and wherein one of said production modules positioned between said proximal-most and distal-most production modules comprises a depyrogenator and/or sterilization module, comprising a transparent tubular body, and an irradiation source positioned external to said transparent tubular body, said irradiation source capable of heating the internal environment of the depyrogenation and/or sterilization module to a temperature sufficient to depyrogenate or sterilize articles passing therethrough, and associated processes.