%A Ming Zeng, Ping Li, Nan Wu, Xiaofang Li, Chang Wang %T Preparation and characterization of a novel microorganism embedding material for simultaneous nitrification and denitrification %0 Journal Article %D 2017 %J Front. Environ. Sci. Eng. %J Frontiers of Environmental Science & Engineering %@ 2095-2201 %R 10.1007/s11783-017-0961-3 %P 15- %V 11 %N 6 %U {https://journal.hep.com.cn/fese/EN/10.1007/s11783-017-0961-3 %8 2017-12-25 %X

CD enhances the hydrophilic property of traditional PVA-SA gel solution.

CD increases the density of embedded microorganism and micro porosity of bead.

CD makes the maximum endogenous respiration rate being high.

30-1.7-CD contributes the highest total inorganic nitrogen removal efficiency.

Comamonas sp. mainly realize the simultaneous nitrification and denitrification.

A novel microorganism embedding material was prepared to enhance the biological nitrogen removal through simultaneous nitrification and denitrification. Polyvinyl alcohol (PVA), sodium alginate (SA) and cyclodextrin (CD) were used to compose gel bead with embedded activated sludge. The effects of temperature, CD addition and concentrations of PVA and SA on nitrogen removal were evaluated. Results show that the gel bead with CD addition at 30°C contributed to the highest nitrogen removal efficiency and nitrogen removal rate of 85.4% and 2.08 mg·(L·h)?1, respectively. Meanwhile, negligible NO3? and NO2? were observed, proving the occurrence of simultaneous nitrification and denitrification. The High-Throughput Sequencing confirms that the microbial community mainly contained Comamonadaceae in the proportion of 61.3%. Overall, CD increased gel bead’s porosity and resulted in the high specific endogenous respiration rate and high nitrogen removal efficiency, which is a favorable additional agent to the traditional embedding material.