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Applicability of Temperature Correction Trans-membrane Pressure as a Fouling Index of Membrane Water Treatment Process

막여과 정수처리 공정에서 온도보정차압 식의 파울링 지표로서의 활용성 검토

Kim, Minjae;Lim, Jae-Lim;Lee, Kyung-Hyuk;Lee, Young-Joo;Kim, Suhan
김민재;임재림;이경혁;이영주;김수한

  • Received : 2015.11.13
  • Accepted : 2016.01.05
  • Published : 2016.02.28

Abstract

Temperature correction trans-membrane pressure (TC-TMP) is frequently used as a fouling index in membrane water treatment plants. TC-TMP equation is derived based on an assumption that the total membrane resistance (i.e. the sum of the intrinsic membrane resistance and fouling resistance) is not affected by temperature. This work verified the validity of this assumption using microfiltration (MF) and ultrafiltration (UF) membranes with and without fouling. The foulants used in the work were kaolin (inorganic) and humic acid (organic). The intrinsic resistances of MF and UF membranes remains at constant values regardless of temperature change. When the same amount of foulants were accumulated on the membrane, inorganic fouling resistance with kaolin was constant regardless of temperature change while organic fouling resistance with humic acid decreased at higher temperatures, which means that TC-TMP cannot be used as a fouling index when organic fouling occurs in a real field application. Since TC-TMP underestimates the amount of fouling at higher temperatures, more attention should be necessary in the operation of membrane water treatment plant in a hotter season like summer.

Keywords

temperature correction trans-membrane pressure;membrane water treatment process;fouling index;membrane resistance

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Acknowledgement

Supported by : 부경대학교