Fine bubble aeration. Mathematical modeling of time-dependent operation

Journal Article · · Sep. Sci. Technol.; (United States)

DOI:https://doi.org/10.1080/01496398808058451· OSTI ID:6107712

Wilson, D J

The operation of fine bubble aeration columns in the time-dependent mode is modeled. The kinetics of mass transfer between the solution and the rising bubbles is included by means of a time-constant approach. The magnitude of ..delta..t is limited by the requirement that u/sub w/ x ..delta..t/..delta..x be less than 1 (u/sub w/ is the linear velocity of the aqueous phase); the magnitudes of the mass transfer time constant and the rise velocity of the bubbles do not affect the maximum value of ..delta..t which can be used. The time constant for mass transfer is the reciprocal of the least positive eigenvalue of a suitably chosen diffusion problem. The effects of influent flow rate, number of compartments into which the column is partitioned, bubble boundary layer thickness, and Henry's constant for the volatile solute are examined. Transient effects associated with startup and with concentration pulses in the influent are studied.

• Research Organization: Vanderbilt Univ., Nashville, TN (USA)
• OSTI ID: 6107712
• Journal Information: Sep. Sci. Technol.; (United States), Journal Name: Sep. Sci. Technol.; (United States) Vol. 23:14-15; ISSN SSTED
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AERATION
BUBBLES
CHEMICAL REACTION KINETICS
DATA
DIFFUSION
EXPERIMENTAL DATA
FLOW RATE
HYDROGEN COMPOUNDS
INFORMATION
KINETICS
MASS TRANSFER
MATHEMATICAL MODELS
MATTER
NUMERICAL DATA
OXYGEN COMPOUNDS
PURIFICATION
REACTION KINETICS
REMOVAL
SOLUTES
TIME DEPENDENCE
VOLATILE MATTER
WATER