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Membrane Water Treatment
  Volume 3, Number 2, April 2012 , pages 113-121

Application of upflow multi-layer bioreactor (UMBR) for domestic wastewater treatment in HCMC
Cao Duc Hung, Nguyen Ngoc Han, Nguyen Phuoc Dan, Bui Xuan Thanh,Kwon J.C., Shin H.S. and Lee E.T.

    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 m3/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 m3/day showed that removal of COD, SS, TKN, N-NH4, T-N, and color were 91%, 87%, 86%, 80%, 91% and 91%, respectively.
Key Words
    UMBR; up-flow multi-layer bioreactor; nutrient removal; domestic wastewater
Cao Duc Hung, Nguyen Ngoc Han, Nguyen Phuoc Dan*, Bui Xuan : Faculty of Environment, Ho Chi Minh City University of Technology, Vietnam
Thanh,Kwon J.C. and Lee E.T.: R&D Center, Ecodigm Co., Ltd., 306 DTV Post BI, Daejeon 305-501, Korea
Shin H.S. : Department of Civil and Environmental Engineering, KAIST, Daejon 305-701, Korea

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