PODDS et AL
Prediction Of Discolouration in Distribution Systems &
Addressing LEMA 

PODDS et AL represents a truly treatment-to-tap approach to managing drinking water quality, in particular the primary customer observed issue of discolouration. By understanding the underlying cause is the endemic accumulation of low concentrations of background material, either as layers on pipe surfaces (PODDS) or as localised elevated material accumulation (LEMA) deposits, sustainable and low-cost innovative hydraulic strategies have been successfully developed in collaboration with UK water companies. 

To support a transistion to self-maintaining networks, free modelling support tools have been developed (PODDS APP and VCDM), whilst simple adaptations to network design and operation once proven offer benefits including reduced complexity and improved resilience, disinfectant retention and ultimately customer service.

"Working with UK water companies, it has been shown discolouration can be sustainably managed by non-disruptive pro-active hydraulic conditioning. Application of the research to 2,686km of trunk mains between 2015-2020 delivered over £411m savings in operational and capital expenditure." REF 2021.