Membrane and Water Treatment

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Application of upflow multi-layer bioreactor (UMBR) for domestic wastewater treatment in HCMC

  • Cao, Duc Hung (Faculty of Environment, Ho Chi Minh City University of Technology) ;
  • Nguyen, Ngoc Han (Faculty of Environment, Ho Chi Minh City University of Technology) ;
  • Nguyen, Phuoc Dan (Faculty of Environment, Ho Chi Minh City University of Technology) ;
  • Bui, Xuan Thanh (Faculty of Environment, Ho Chi Minh City University of Technology) ;
  • Kwon, J.C. (R&D Center, Ecodigm Co., Ltd.) ;
  • Shin, H.S. (Department of Civil and Environmental Engineering, KAIST) ;
  • Lee, E.T. (R&D Center, Ecodigm Co., Ltd.)
  • Received : 2011.11.30
  • Accepted : 2012.02.03
  • Published : 2012.03.25
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Abstract

Up-flow multi-layer bioreactor (UMBR) is a hybrid system using dual sludge that consists of an up-flow multi-layer bioreactor as anaerobic/anoxic suspended growth microorganisms followed by an aeration tank. The UMBR acts as a primary settling tank, anaerobic/anoxic reactor, thickener which requires low energy due to mixing by up-flow stream. This study focused on using a pilot UMBR plant with capacity of 20-30 $m^3$/day for domestic wastewater in HCMC. HRTs of UMBR and aeration tank were 4.8 h and 7.2 h, respectively. The average MLSS of UMBR ranged from 10,000-13,600 mg/l SS. Internal recycle rate and sludge return were 200-300% and 150-200%, respectively. The results obtained from this study at flow rate of 20 $m^3$/day showed that removal of COD, SS, TKN, N-$NH_4$, T-N, and color were 91%, 87%, 86%, 80%, 91% and 91%, respectively.

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References

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