Studies on the reactor-comparting enhancing the nitrification property of biologic contact oxidation

Xian Ning Li, Hai Liang Song, Xi Wu Lu, Osamu Nishimura

Research output: Contribution to journalArticlepeer-review


In order to overcome the problem of competing inferiority of nitrification bacterium to organism degradation bacterium influencing the nitrification activity in common contact oxidation, the reactor was isolated simply and the characteristics of enhancing the nitrification property through microbial ecological control was studied. Under the condition of medium loading of BOD 1.0 kg/(m3·d) and TN 0.19 kg/(m3·d) respectively, the nitrification rate after reactor-comparting was enhanced 33%. These two reactors comparted formed the function areas of organism degradation main and nitrification main respectively. The nitrifying rate of partitional contact oxidation reactor was 2.8-4.5 times of the single partition reactor. The density of nitritebacteria enhanced an order of magnitude. When the partition reactor operating at high TN loading of 0.26 kg/(m3·d), its nitrification rate declined due to decrease of nitrifying bacterium activity; while operating at low loading of 0.08 kg/(m3·d), the too low NH4+-N concentration of rear-area limited the exertion of nitrification ability; therefore, the comparting reactor should be operated under medium loading.

Original languageEnglish
Pages (from-to)62-66
Number of pages5
JournalZhongguo Huanjing Kexue/China Environmental Science
Issue number1
Publication statusPublished - 2006 Feb 1


  • Biologic contact oxidation reactor
  • Nitrate bacteria
  • Nitrification
  • Nitritebacteria
  • Reactor-comparting

ASJC Scopus subject areas

  • Environmental Science(all)


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