• AWWA MTC93048
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AWWA MTC93048

  • Effect of Ozonation on Organic Membrane Fouling
  • Conference Proceeding by American Water Works Association, 01/01/1993
  • Publisher: AWWA

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Ozone enhances ultrafiltration for treated water (clarified and settled water) but reduces fluxes for raw surface water for low ozone dose. The critical zone for raw water is from 1 to 3 mg/l ozone introduced. As ozone reacts rapidly with organic matter especially with insaturated compounds (50% reduction for only 1.5 mg O3/l introduced), the membrane permeability is improved from 10 to 20% compared to ultrafiltration treatment alone. In raw water, ozone does not only react with soluble organic matter but also with particulate matter. Indeed a microflocculation phenomena for the critical ozone doses appears and participate to the membrane fouling. This microflocculation phenomena is the consequence of a surface charge neutralization, an increase in size of the particle, a polymerization of organic matters and a precipitation of oxidation byproducts with bivalent compounds.

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