Dedication This technical paper is published in memory of our coauthors, Dr. Donald
B. Aulenbach and Dr. Nazih K. Shammas, who worked closely with Professors Lawrence
K. Wang, Mu-Hao Sung Wang, William A. Selke, Milos Krofta, and Daniel Guss from 1981 to
2019 for developing a humanitarian engineering program at the Lenox Institute of Water Technology (LIWT, formerly Lenox Institute for Research), teaching/researching there as an Adjunct
Professor for almost two decades, and publishing many research papers and textbooks for academic
contribution to the humanity. We salute and will forever remember Don and Nazih.
Glossary
Dissolved air flotation (DAF) One of dissolved gas flotation (DGF) processes
when air is used for generation of gas bubbles. A typical example is Krofta
Engineering Corporation’s Supracell clarifier; see dissolved gas flotation (DGF).
Dissolved gas flotation (DGF) It is a process involving pressurization of gas at
25–95 psig for dissolving gas into water and subsequent release of pressure
(to 1 atm) under laminar flow hydraulic conditions for generating extremely
Fig. 6.27 A dissolved air flotation boat plant designed by the Lenox Institute of Water Technology
(LIWT) and Krofta Engineering Corporation (KEC) [44]
294
D. B. Aulenbach et al.
B. Aulenbach and Dr. Nazih K. Shammas, who worked closely with Professors Lawrence
K. Wang, Mu-Hao Sung Wang, William A. Selke, Milos Krofta, and Daniel Guss from 1981 to
2019 for developing a humanitarian engineering program at the Lenox Institute of Water Technology (LIWT, formerly Lenox Institute for Research), teaching/researching there as an Adjunct
Professor for almost two decades, and publishing many research papers and textbooks for academic
contribution to the humanity. We salute and will forever remember Don and Nazih.
Glossary
Dissolved air flotation (DAF) One of dissolved gas flotation (DGF) processes
when air is used for generation of gas bubbles. A typical example is Krofta
Engineering Corporation’s Supracell clarifier; see dissolved gas flotation (DGF).
Dissolved gas flotation (DGF) It is a process involving pressurization of gas at
25–95 psig for dissolving gas into water and subsequent release of pressure
(to 1 atm) under laminar flow hydraulic conditions for generating extremely
Fig. 6.27 A dissolved air flotation boat plant designed by the Lenox Institute of Water Technology
(LIWT) and Krofta Engineering Corporation (KEC) [44]
294
D. B. Aulenbach et al.