Full Description

With the promulgation of the Microbial/Disinfection By-products (M/DBP) Rule and the Enhanced Surface Water Treatment Rule (ESWTR) and the new health concerns associated with trihalomethanes (THMs) and pregnant women, utilities will continue their efforts to produce an ever more pure drinking water. However, their customers are unlikely to see the benefits of this more sophisticated and costly treatment if the utilities continue to deliver their product through old and neglected distribution systems that were never designed with water quality in mind. As the regulations become more stringent and customers' expectations continue to grow, it becomes imperative that utilities focus on water quality control in their distribution systems. There is a need to: reduce excess storage and detention time; to remove the accumulated debris and biofilms; to minimize the opportunities for cross connections and backflows and other system penetrations that compromise the integrity of the water; to enhance the water quality monitoring efforts throughout the distribution system; and, to begin operating the distribution system as an extension of the treatment plant. The most powerful tools available to remove accumulated debris and biofilms from distribution systems are a well engineered and controlled Unidirectional Flushing Program, and implementation of a uniform Code of Practice. Although full implementation of both programs can take up to three years, the benefits include positive control of the water quality in the distribution system and a greater chance that the utility customers will see the benefit of the improvements that have been done at the treatment plant.

Product Details

Published: 01/01/1998 ISBN(s): 0898679796 Number of Pages: 5File Size: 1 file , 32 KB