TY - JOUR
T1 - Achieving reliable partial nitrification and anammox process using polyvinyl alcohol gel beads to treat low-strength ammonia wastewater
AU - Wang, Jinxing
AU - Liang, Jidong
AU - Sun, Li
AU - Shen, Jianqing
AU - Wang, Meng
N1 - Funding Information:
The authors would like to thank the National Natural Science Foundation of China (Grant No. 31670510), The Key Research and Development Program of Shaanxi Province in China (2019GY-154), and Tong Xiang Small Boss Special Plastic Products Co. Ltd for the financial support. Jinxing Wang would like to thank China Scholarship Council (CSC) for supporting her research at Washington University in St. Louis.
Funding Information:
The authors would like to thank the National Natural Science Foundation of China (Grant No. 31670510 ), The Key Research and Development Program of Shaanxi Province in China ( 2019GY-154 ), and Tong Xiang Small Boss Special Plastic Products Co. Ltd for the financial support. Jinxing Wang would like to thank China Scholarship Council (CSC) for supporting her research at Washington University in St. Louis.
Publisher Copyright:
© 2021
PY - 2021/3
Y1 - 2021/3
N2 - In this study, polyvinyl alcohol (PVA) gel beads were used to aid the partial nitrification and anammox process (PN/A) for treating low-strength ammonia wastewater. When treating synthetic and municipal wastewater, the reactor amended with PVA gel beads achieved a total nitrogen removal efficiency of 75.1 ± 8.4% and 66.6 ± 7.0% respectively, while the control reactor without PVA gel beads achieved 63.2 ± 7.8% and 28.2 ± 11.5% respectively. Dissolved oxygen (<0.5 mg O2 L−1) and substrate diffusion in porous PVA gel beads facilitated the formation of microbial stratification in the gel beads. Unclassified Candidatus Brocadiaceae (major anammox bacteria) and Ignavibacterium (major ammonia oxidizing bacteria) enriched in the inside and outside layers of PVA gel beads, which benefited the synergetic cooperation of these bacteria and protecting them from environmental fluctuations. This study provides a promising solution for achieving a reliable PN/A process in mainstream wastewater treatment.
AB - In this study, polyvinyl alcohol (PVA) gel beads were used to aid the partial nitrification and anammox process (PN/A) for treating low-strength ammonia wastewater. When treating synthetic and municipal wastewater, the reactor amended with PVA gel beads achieved a total nitrogen removal efficiency of 75.1 ± 8.4% and 66.6 ± 7.0% respectively, while the control reactor without PVA gel beads achieved 63.2 ± 7.8% and 28.2 ± 11.5% respectively. Dissolved oxygen (<0.5 mg O2 L−1) and substrate diffusion in porous PVA gel beads facilitated the formation of microbial stratification in the gel beads. Unclassified Candidatus Brocadiaceae (major anammox bacteria) and Ignavibacterium (major ammonia oxidizing bacteria) enriched in the inside and outside layers of PVA gel beads, which benefited the synergetic cooperation of these bacteria and protecting them from environmental fluctuations. This study provides a promising solution for achieving a reliable PN/A process in mainstream wastewater treatment.
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U2 - 10.1016/j.biortech.2021.124669
DO - 10.1016/j.biortech.2021.124669
M3 - Article
C2 - 33445011
AN - SCOPUS:85099227862
SN - 0960-8524
VL - 324
JO - Bioresource technology
JF - Bioresource technology
M1 - 124669
ER -
