J4 ›› 2012, Vol. 42 ›› Issue (3): 832-837.

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Simulataneous Nitrogen Removal in the Micro-Pressurized Fluidized Hybrid Biological Reactor

LIU Miao, CHEN Rui-yang, LI Guang-zhu, LANG Gui-lin   

  1. Key Laboratory of Groundwater Resources and Environment|Ministry of Education, Jilin University, Changchun130021, China
  • Received:2011-12-19 Online:2012-05-26 Published:2012-05-26

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Abstract:

By regulating aeration system, anoxic and aerobic areas can coexist in the micro-pressurized fluidized hybrid biological reactor(MP-FHBR). Using the characteristic and the mixed organism of activated sludge and suspended biofilm coexisting in the MP-FHBR, study was conducted for simulataneous nitrogen removal. The experimental results showed that, nitrogen can be effectively simulataneous removal under the condition of anoxic-aerobic in the MP-FHBR. Under the conditions of this experiment, removal rates of TN and COD reached 77.5% and 98.3% respectively. Reducing the DO concentration to form completely anoxic environment within the reactor have no significant influence on TN removal effect of MP-FHBR, but it reduce the COD removal rate of the system. Improving the DO concentration to form completely aerobic environment within the reactor, TN removal effect of MP-FHBR decreased significantly. With the increasing of COD/TN, the TN removal efficiency was increased. TN removal efficiency was increased from 58.4% to 78.8%, when COD/TN was increased from 2 to 10, further increasing COD/TN, TN removal effect was not significantly increased. With the increase of MLSS, the TN removal efficiency was increased, leading to a more apparent denitrification efficiency of MP-FHBR.

Key words: hybrid biological reactor, anoxic, aerobic, nitrogen removal, water pollution control

CLC Number: 

  • X523
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