DEGASIFICATION

As gases are not removed by the membrane process, they remain in the permeate and must be removed by degasification or air-stripping. The Collier County deeper ground water contains significant hydrogen sulfide. Permeate flow from the membrane trains is split and fed into 3 degasifiers. The flow enters each structure near the top into a head box. From there the permeate is distributed, through spray nozzles, uniformly across the top of a packed media, reduing the flow into droplet form increasing the surface area in contact with the air. Simultaneously, the large air volume from the blower system enter the bottom of each degasifier and flows upward through the permeate droplets, further increasing the turbulence. This action exposes the droplet surface to the air flow, allowing the entrapped gases to transfer to the air stream at a transfer rate according to their respective partial pressures. The degasified permeate from each unit collects in a common clear well. Chlorine solution is introduced to the degasified permeate as it enters the clear well at each degasifier. Fluoride solution is also introduced at this point

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