Bioaugmentation with Acinetobacter sp. TAC-1 to enhance nitrogen removal in swine wastewater by moving bed biofilm reactor inoculated with bacteria.
Bioresour Technol, 2022/9;359:127506.
Chen X[1], Yuan C[1], Zhu Y[1], Liu H[1], Chen W[1], Zhang Q[2]
Affiliations
PMID: 35750120DOI: 10.1016/j.biortech.2022.127506
Impact factor: 11.889
Abstract
To enhance the performance of moving bed biofilm reactor (MBBR) inoculated with heterotrophic nitrification-aerobic denitrification (HN-AD) bacteria, bioaugmentation with Acinetobacter sp. TAC-1 was firstly employed and then the treatment performance for real swine wastewater was presented in this study. Results indicated that NH4+-N and TN removal rates of bioaugmented reactor were significantly improved from 16.53 mg/L/h and 16.15 mg/L/h to 24.58 mg/L/h and 24.45 mg/L/h, respectively. The efficient removal performance (NH4+-N 95.01%, TN 86.40%) for real swine wastewater was achieved within 24 h. Microbial analysis indicated that the composition of functional bacteria varied with the introduction of Acinetobacter sp. TAC-1, especially the abundance of Acinetobacter, Paracoccus and Rhodococcus related to the nitrogen removal. Furthermore, bioaugmentation with Acinetobacter sp. TAC-1 increased abundance of enzymes and functional genes (nirS, nirK and norZ) corresponding to denitrification that may be responsible for the enhanced nitrogen removal performance.
Keywords: Acinetobacter sp. TAC-1; Bioaugmentation; Microbial composition; Nitrogen removal; Swine wastewater
MeSH terms
Acinetobacter; Animals; Biofilms; Bioreactors; Denitrification; Nitrification; Nitrogen; Swine; Waste Water
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