Stripping of trihalomethanes from drinking water in a bubble-column aerator

✍ Scribed by Carols Velázquez; L. Antonio Estévez

• Publisher: American Institute of Chemical Engineers
• Year: 1992
• Tongue: English
• Weight: 657 KB
• Volume: 38
• Category: Article
• ISSN: 0001-1541
• DOI: 10.1002/aic.690380206

✦ Synopsis

The desorption of trihalomethanes ( THMs) in a cocurrent bubble column has been studied experimentally to validate a previously developed model. The experiments were carried out in a 0.2-m-diameter, 2.4-m-high, Plexiglas bubble column, equipped with seven samplers alongside. The phases in contact were tap water and air. Three out of the four THMs normally found in drinking water were spiked in the feed tank to assure their detection in the analyses. After preparing the feed, each run was begun by setting the flow rates of water and air, and waiting until a steady state was attained. Then, samples from each sampler were taken and sent for chemical analysis. A total of 12 runs were performed with varying superficial gas and liquid velocities, and up to four concentration profiles were obtained for each run. The experimental results were then compared to the predictions of the model proposed by Estevez ( 1991 ). The agreement between calculated and experimental concentration profiles was quite good, indicating that the model can be used reliably either in the simulation or design of industrial scale equipment.