Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Analysis of Effects of Factors Influencing Biofilm Formation in Drinking Water Distribution Pipe Using Factorial Experimental Design

요인실험계획을 이용한 수도관 생물막 형성 영향 인자의 효과 분석

  • 박세근 (강원대학교 환경공학과) ;
  • 최성찬 (한림대학교 환경시스템공학과) ;
  • 김영관 (강원대학교 환경공학과)
  • Received : 2004.12.14
  • Accepted : 2005.03.18
  • Published : 2005.04.15
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Abstract

This study evaluated the effect of factors influencing the initial biofilm formation in drinking water distribution pipe by running experiments using a $2^{4-1}$ fractional factorial experimental design with a replicate. Important variables used for assessing biofilm formation included BDOC(biodegradable dissolved organic carbon), viable heterotrophic bacteria present in drinking water, water temperature, and shear stress at two levels each. Based on the statistical analysis of biofilm levels measured as attached HPC(heterotrophic plate count) and community-level assay, the main factors that have significant effects on biofilm formation were found to be viable heterotrophic bacteria and BDOC. Water temperature only exhibited significant effect on the levels of attached HPC, while shear stress was not a significant factor under given conditions. Moreover, the statistical analysis revealed that interactions between the important variables were not statistically significant at a 0.05 significance level.

Keywords

Acknowledgement

Supported by : 한국과학재단

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