Date of Publication :30th November 2017

Abstract: According to the Urban Drinking Water Distribution Systems (UDWDS), safety and security are two important features. People often compromised by a suite of physical, hydraulic, and chemical factors adversely impacting the quality of potable water reaching consumer taps. Scales and biofilm conglomerates (SBC) with sorption of water chemicals and planktonic microorganisms are recognized as underestimated contaminant sources in ageing pipe networks of UDWDS. The main aim of this study was to provide an updated review of processes and factors associated with the increasing the frequency of deteriorated finished water quality as a result of SBC effects in UDWDS. Important synergistic SBC effects on finished water quality were identified as: Those containing the chemical release from pipe scales due to biofilm-induced alterations at the pipe surface/water interface. The synergistic SBC action on promoting increased release rates of toxic chemicals or pathogens into the water. The microbial enhanced corrosive phenomena on pipe scales and their constituents.

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