2011-03-30 Vreeburg Discolouration in drinking water networks-Causes and remedies that work.pptVIP

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2011-03-30 Vreeburg Discolouration in drinking water networks-Causes and remedies that work.ppt

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2011-03-30 Vreeburg Discolouration in drinking water networks-Causes and remedies that work

Watercycle Research Institute Plaats hier de titel van de presentatie Discolouration in drinking water networks: Causes and remedies that work Dr ir Jan Vreeburg, 30-03-2011 Discolouration is a common problem, even in the Netherlands Something happens during transport and distribution Cast iron: the classic cause of discolouration (?100 Cast Iron,1900) But: there is so little cast iron and still 3000 to 6000 complaints How to measure discoloured water: Monitoring System Turbidity pH Oxygen Temperature Conductivity Pressure (Velocity) De overgangssituatie voor de komende 100 jaar The complete picture:Particle related processes in a network Remedies: Hypothesis effect particle load from treatment Measuring method:Resuspension Potential Measurement Validate RPM result Resuspension Potential Measurement Effect reducing particles from treatment:The experiment with particle free water Input particle volume RPM graphical Second operational remedyeffective flushing The Flush Mantra 1,5 m/s Two to three turn overs Clear water front Systematic Approach is crucial Systematic approach flush plans. Effect systematic cleaning What is removed: Relation TSS-Turb Removed TSS during flushing Third remedy: control deposition process? Self cleaning network Self cleaning networks: the principle Example conventional network Self cleaning network It takes time to implement an innovation Take-home messages Discolouration in drinking water networks Causes Discolouration originates at the treatment Network hydraulics play most important role Remedies that work Reduce particle load Unidirectional flushing under Mantra-conditions(1.5, 2-3, CWF) Self cleaning networks Discolouration in drinking water networks: Causes and remedies that work Dr ir Jan Vreeburg, 30-03-2011 * Treatment Distribution network Transport Monitor 1 Monitor 2 Monitor 3 flow ? J.H.G. Vreeburg Corrosion Bed loadtransport Biofilm formation sloughing Precipitation flocculation incidental resuspension (AOC and d