EFFECTS OF MICROBIAL CARRIERS ON PERFORMANCE AND MICROBIAL COMMUNITY STRUCTURE OF MBBR

LI Yong; YUAN Hui-zhou; KE Shui-zhou; ZHU Liang; LI Zhan-peng

doi:10.13205/j.hjgc.202112015

Volume 39 Issue 12

Mar. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(12): 100-106

LI Yong, YUAN Hui-zhou, KE Shui-zhou, ZHU Liang, LI Zhan-peng. EFFECTS OF MICROBIAL CARRIERS ON PERFORMANCE AND MICROBIAL COMMUNITY STRUCTURE OF MBBR[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(12): 100-106. doi: 10.13205/j.hjgc.202112015

Citation:

LI Yong, YUAN Hui-zhou, KE Shui-zhou, ZHU Liang, LI Zhan-peng. EFFECTS OF MICROBIAL CARRIERS ON PERFORMANCE AND MICROBIAL COMMUNITY STRUCTURE OF MBBR[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(12): 100-106. doi: 10.13205/j.hjgc.202112015

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EFFECTS OF MICROBIAL CARRIERS ON PERFORMANCE AND MICROBIAL COMMUNITY STRUCTURE OF MBBR

doi: 10.13205/j.hjgc.202112015

1. College of Civil Engineering, Hunan University, Changsha 410082, China;
2. Department of Construction and Environmental Engineering,Shenzhen Polytechnic, Shenzhen 518055, China

Received Date: 2020-11-05
Available Online: 2022-03-30
Publish Date: 2022-03-30

Abstract

Abstract

In this study, three kinds of microbial carriers including porous polymer carriers(PPC), polyurethane(PU) and polypropylene(PP) were selected to compare and analyze the start-up performance, nitrogen removal performance and microbial community structure of mobile bed biofilm reactor(MBBR) with three carriers respectively. The results showed that when the influent ammonia concentration was 20 mg/L, PPC and PU carriers showed better film-hanging start-up performance and ammonia nitrogen removal performance. The average effluent ammonia nitrogen concentration was about 5 mg/L, while the average effluent ammonia nitrogen concentration of PP carrier was nearly 7 mg/L, and the removal stability was poor. In addition, denitrification effect of PU and PP carrier was not ideal, and the average concentration of effluent nitrate nitrogen was 6.07, 4.87 mg/L, respectively, much higher than PPC carrier(2.80 mg/L). The microbial sequencing results showed that the selection of microbial carriers had a certain degree of influence on microbial community structure of the MBBR process, but Proteobacteria and Bacteroidetes were always the most dominant bacterial species. Analysis at the level of genus indicated that Denitratisoma bacteria with high abundance existed on PPC carrier, and the unique structure and hydrophilicity of PPC carrier contributed to the creation of anoxic environment, and improved the overall Denitratisoma performance and stability of the reactor where it was located.
- microbial carrier,
- mobile bed biofilm reactor,
- microbial community

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References(25)

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