Analysis on characteristics of attapulgite immobilized microorganisms and influencing factors of treatment effect
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X52

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Program of Agriculture and Rural Affairs Commission of Shanghai Municipality (No. (2020), 3-2);Key-Area Research and Development Program of Guangdong Province(2020B0202010009)

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    Abstract:

    In the present study, attapulgite pellets with a diameter of 2 mm were selected as inorganic carriers, and the native microorganisms screened from culture pond were immobilized using the adsorption method to create immobilized microbial pellets. The characteristics and performance of these pellets on removal of CODMn and ammonia from aquaculture wastewater were investigated. The results indicate that immobilized microbial pellets have good mechanical strength. The number of bacteria released into water can be maintained at 1.5×106 CFU/mL, and the sustained release performance can be maintained under different environmental conditions. The immobilized microbial pellets can efficiently degrade CODMn and ammonia, and the degradation kinetics fit the Monod model very well. The effect of environmental conditions on the degradation performance of immobilized microbial pellets showed that neutral conditions are suitable for the degradation of CODMn, while neutral and alkaline conditions for ammonia. There is no significant difference in the degradation of CODMn with different gas flow rates (P>0.05). The higher the dissolved oxygen in the water is[DO=(8.600±0.028) mg/L], the higher the ammonia removal rate is. As the initial concentration of pollutants increase, the first-order rate constants of CODMn and ammonia gradually increase (except the too high ammonia concentration). Within 10~35℃, the higher the temperature is, the first-order rate constants of CODMn and ammonia is.

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蔡徐依,颜开,田亚雄,王茜,李娟英,张六六,戴习林.凹凸棒土固定化微生物颗粒性能及处理效果影响因素分析[J].上海海洋大学学报,2022,31(5):1136-1145.
CAI Xuyi, YAN Kai, TIAN Yaxiong, WANG Qian, LI Juanying, ZHANG Liuliu, DAI Xilin. Analysis on characteristics of attapulgite immobilized microorganisms and influencing factors of treatment effect[J]. Journal of Shanghai Ocean University,2022,31(5):1136-1145.

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History
  • Received:April 26,2022
  • Revised:July 21,2022
  • Adopted:July 24,2022
  • Online: October 12,2022
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