The Green Agenda - Who Gives a Floc?

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Presented at the 14th International Water Association (IWA) Young Water Professionals Conference. Teesside University, 17th-19th April 2013
Position: PhD Student at Cranfield University

Published in: Technology, Business
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  • Increasing levels of NOMCoagulation/flocsFiltrationDBPs/THMs….. Flocs are important
  • Info about TRUSTTransitions to the Urban Water Services of Tomorrow
  • NOM made up of complex mixChemical characterisationFractionationHPO, HPI. Transphilic
  • NOM made up of complex mixChemical characterisationFractionationHPO, HPI. Transphilic
  • Simple jar testParticle size analysis over timeApplied shear stress
  • Mimicking changes in water quality
  • The Green Agenda - Who Gives a Floc?

    1. 1. The Green Agenda – Who Gives a Floc? Siobhán McGrath Cranfield University
    2. 2. Raw Water Coagulation Filtration Disinfection
    3. 3. www.trust-i.net - info@trust-i.net
    4. 4. Natural Organic Matter (NOM)
    5. 5. How do changes in raw water quality effect floc strength?
    6. 6. SITE 1 10.4 mg.l-1 DOC 1.5 m-1.l mg-1.C SUVA 2.0 NTU SITE 2 2.8 mg.l-1 DOC 3.7 m-1.l mg-1.C SUVA 3.7 NTU SITE 3 4.8 mg.l-1 DOC 4.6 m-1.l mg-1.C SUVA 0.88 NTU
    7. 7. Natural Organic Matter (NOM)
    8. 8. XAD-4 XAD-7HP
    9. 9. SITE 1 10.4 mg.l-1 DOC 1.5 m-1.l mg-1.C SUVA 2.0 NTU SITE 2 2.8 mg.l-1 DOC 3.7 m-1.l mg-1.C SUVA 3.7 NTU SITE 3 4.8 mg.l-1 DOC 4.6 m-1.l mg-1.C SUVA 0.88 NTU
    10. 10. How do changes in raw water quality effect floc strength?
    11. 11. Image: Hydro-Zone Inc. http://www.hydro-zoneinc.com/wastewater.htm accessed 16.04.13
    12. 12. 4.8 mg/l DOC 7.2 mg/l DOC
    13. 13. Is there a way to predict treatability based on water quality?How can water treatment plant operators react to these variations? How can the water industry design WTWs for an uncertain future? (Hopefully I will have all these answers in a year!)
    14. 14. The Green AgendaNot just energy efficiency and saving water!
    15. 15. @IrishFemgineeruk.linkedin.com/in/SMcGrathCEng s.mcgrath@cranfield.ac.uk

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