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A Method of Evaluating and Controlling Corrosion Rate for Prevention of Water Quality Problems in Multiple Water Source

  • Crisisonomy
  • Abbr : KRCEM
  • 2016, 12(11), pp.77-84
  • Publisher : Crisis and Emergency Management: Theory and Praxis
  • Research Area : Social Science > Public Policy > Public Policy in general

Sung Hoon Shin 1 Jung Jongtai 1

1인천대학교

Accredited

ABSTRACT

In this study, we evaluated the impact on the contamination accident of water quality due to a pipe corrosion problem when using surface water and treated sewage water by the water blending method, and developed a controlling method. As result of experiment, carbon steel was rapidly corroded 14.7%~30.9% more than cast iron in surface water, treated sewage water, and surface water blended with treated sewage water. When injecting dissolved CO2 liquid slaked lime for corrosion control, corrosion reduction effect was found to be 39.15% for CaCO3 30mg/L and 54.7% for CaCO3 60mg/L compared to CaCO3 0mg/L. Both corrosion speed and corrosion degree increase with stirring speed. The Shannon Index was relatively low in blended water sample than either surface water or treated sewage water. While microorganism Betaproteobacteria became dominants in cast iron and PE, but microorganism did not become dominants in carbon steel.

Citation status

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