Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Application of Dynamic $\bar{x}$-R Control Chart for Advanced Phase Isolation Ditch (APID) Process

APID공정 내 공정진단을 위한 dynamic $\bar{x}$-R 관리도의 적용

  • An, Sang-Woo (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Kwak, Sung-Keun (Environmental Business Division, Taiwha Lease Industrial Co., Ltd) ;
  • Jung, Young-Wook (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Chung, Mu-Keun (Environmental Business Division, Taiwha Lease Industrial Co., Ltd) ;
  • Park, Jae-Woo (Department of Civil and Environmental Engineering, Hanyang University)
  • Received : 2009.05.27
  • Accepted : 2009.07.28
  • Published : 2009.09.30
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Abstract

Advanced Phase Isolation Ditch (APID) process was studied to develop economic retrofitting technology, for the plants where retrofitting of common activated sludge process is required. In this study, to evaluate and monitor the effluent water quality ($BOD_5$, SS, T-N, and T-P) and operating conditions (Influent, SVI, SRT, and HRT) as process capable and stable parameters for treating municipal wastewater, a demonstration plant was installed and operated in the existing sewage treatment plant of P city. During this study, the average effluent $BOD_5$, SS, T-N, and T-P concentrations were 7.7, 5.6, 10.8, and 1.6 mg/L. Trend analysis of influent $BOD_5$, SS, T-N, and T-P in APID process were illustrated that APID process need for more strong APID process management on the winter session, such as developing new intermediated aeration mode, operating methods, and managements strategy. At the application of control chart, the signal of uncommon effects at APID process was determined much higher existing control chart tntr conventional control chart in this study. These results indicate that conventional control chart has been collected and determined cleary signal at only stable situation. Therefore, newly developed APID process of dynamic control chart can be one of the useful tool for monitoring and management process.

Keywords

References

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