Abstract: A method and apparatus predict the organic carbon content of water discharged from a water purification system. Water is directed from a water source across, for example, a source of ultraviolet light of the water purification system under substantially steady-state conditions. A reference mode is established, whereby a reference-mode resistivity change is determined. A purification-mode is then established, whereby a purification mode resistivity change is measured. The reference-mode resistivity change and the purification-mode resistivity change are then combined to obtain a purified value which is associated with the carbon content of water discharged from the water purification system, thereby predicting the carbon content of water discharged from the water purification system.

Abstract: Water to be purified and degassed is passed through a reverse osmosis step which a pure water stream and a high pressure waste water stream are produced. The high pressure waste water is passed through an eductor to produce a vacuum. The pure water stream is passed into a first volume of a degassifier and the vacuum is directed to a second volume of the degassifier. The first and second volume of the degassifier are separated by a hydrophobic membrane.