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YIN Chao, LI Ying, ZHANG Tingyue, LIU Jiamin, CHEN Tida, CUI Dan, HUANG Minsheng. Immobilization and efficacy of an aerobic denitrifier[J]. Journal of East China Normal University (Natural Sciences), 2021, (4): 1-7. doi: 10.3969/j.issn.1000-5641.2021.04.001
Citation: YIN Chao, LI Ying, ZHANG Tingyue, LIU Jiamin, CHEN Tida, CUI Dan, HUANG Minsheng. Immobilization and efficacy of an aerobic denitrifier[J]. Journal of East China Normal University (Natural Sciences), 2021, (4): 1-7. doi: 10.3969/j.issn.1000-5641.2021.04.001

Immobilization and efficacy of an aerobic denitrifier

doi: 10.3969/j.issn.1000-5641.2021.04.001
  • Received Date: 2020-11-16
  • Publish Date: 2021-07-25
  • To improve the environmental tolerance and nitrogen removal efficiency of an aerobic denitrifier, polyvinyl alcohol (PVA), sodium alginate (SA), and rice hull powder were used as immobilized carriers for an aerobic denitrifier and the performance was subsequently evaluated. The results showed that the optimal ratio of immobilized particles was a mixture of 12% PVA, 8% sodium alginate (SA), 0.5 g rice hull powder, and 10 mL bacterial solution. The immobilized particles had strong stability and mass transfer capability; the removal efficiency of TN was 89.35% ~ 90.12% over 48h. The immobilized particles had good tolerance to pH and rotating speed. When the pH was 11, the removal efficiency of TN was 90%. The removal efficiency of TN and NH4+-N was the highest (91.29% and 93.30%, respectively) when the speed was 120 r/min. The immobilized particles were not resistant to low temperatures (10℃ and 15℃), and the TN removal efficiency was only about 20% at 10℃. The TN removal efficiency, however, achieved 90.59% at 30℃.
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