Investigates a biological treatment process for the destruction of trihalomethanes (THMs) in drinking water treatment plants. Determines cometabolism kinetics and the significance of enzyme competition with ammonia for all four THMs with pure culture organism. Extends the kinetics and enzyme competition experiments to mixed-culture nitrifiers typically encountered in drinking water treatment. Also demonstrates THM cometabolism in continuous-flow biofilters and studies monochloramine destruction in GAC beds. Demonstrates THM cometabolism in continuous-flow GAC biofilters receiving ammonia, monochloramine, and THMs in the influent. Published in 2005.