The discovery of a Standard Specific Baseline Mass Transfer Coefficient (KLa0)20 represents a revolutionary change in the understanding, designing, operation and maintenance of aeration equipment, as well as providing a baseline for future research and development for water and wastewater treatment systems. Previously, it has not been possible to correlate mass transfer coefficients (KLa) from one test to another, even under ordinary testing circumstances. This book discusses the use of the Standard Model to determine the baseline for any test, and its major finding is showing that gas transfer is a consistent relativistic theory of molecular interactions based on the Standard Model. Previously, the primary challenge was the appearance of divergences in the mass transfer coefficient calculations and estimations. This procedure of renormalization to a baseline is a great achievement in physics and engineering.