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The removal characteristics of haloacetic acids (HAAs) by adsorption and/orbio-filtration using column tests with four media including ceramic, granular activated carbon (GAC), bioceramic andBAC were conducted. Dichloroacetic acid (DCAA) and trichloroacetic acid (TCAA) were spiked in a true drinking water drawn fromunderground water and were used as the target disinfection byproducts (DBPs). The results indicated thatbiodegradation could remove HAA very effectively. The removal efficiency was higher asthe contact time became longer. When the empty bed contact time (EBCT) was set at 15min,30min and 60min, the removal efficiencies of DCAA were all nearly 100% while for TCAAwere 60%, 94% and 100%, correspondingly. HAAs removal by GAC at the initial period ofthe experiment was from carbon adsorption, whereas biodegradation was dominated for theHAA removal later in the experiment. Includes 16 references, table, figures.

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Edition: Vol. - No. Published: 11/01/2006 Number of Pages: 9File Size: 1 file , 400 KB