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Distribution system materials may be among the most importantfactors influencing the growth of biofilms in distributionsystems. However, relatively little research has beendone to demonstrate the relationships between pipe materialsand linings in the presence of varied organic carbon levels anddisinfectants on biofilm growth and subsequent microbial waterquality.Research in this area is of increasing importance to waterutilities as aging sections of distribution systems must be repairedor replaced and networks must be expanded to meet a growingconsumer base.For utilities seeking methods to control distribution systembiofilm, two alternatives are available. These include the reductionin organic carbon and/or the replacement/relining of iron pipe intheir distribution systems. If organic carbon is high, pipe replacementor relining may be a good option for reducing biofilm problems.However, the economics of this choice must be weighed againsttreatment changes leading to the reduction in organic carbon. Includes 25 references, tables, figures.

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Edition: Vol. 95 - No. 7 Published: 07/01/2003 Number of Pages: 15File Size: 1 file , 240 KB