Simultaneous nitrogen and carbon removal in a single biological aerated filter by the bioaugmentation with heterotrophic-aerobic nitrogen removal bacteria.

Environmental Technology
Haizhen WangQian Chen

Abstract

ABSTRACTAgrobacterium sp. LAD9 capable of heterotrophic-aerobic nitrogen removal was applied into a single biological aerated filter (BAF) for bioaugmented treatment of municipal wastewater. The achievement of simultaneous nitrogen and carbon removal in the bioaugmented system was systematically evaluated by ratios of COD to nitrogen (COD/N), ranging from 1 to 20. The results showed that at an appropriate COD/N ratio of 10, the BAF exhibited excellent carbon and nutrients removal, the averaged removal efficiencies for COD, NH4+-N and TN were 92.3%, 100% and 80.0%, respectively. Long-term operation of the bioaugmented system also confirmed the stability of the treatment efficiency. Further comparisons of SOUR and PCR-DGGE profiles between the bioaugmented and the control system revealed that the introduction of strain LAD9 greatly changed the structure of original microbial community and facilitated their capabilities of aerobic nutrients removal. The proposed bioaugmentation strategy is of particular importance to upgrading or retrofitting concurrent municipal wastewater treatment systems.

References

Feb 28, 2001·Environmental Microbiology·T BouchezM Wagner
Sep 2, 2008·Bioresource Technology·T BouchezR Moletta
Nov 30, 2010·Journal of Industrial Microbiology & Biotechnology·Qian Chen, Jinren Ni
Mar 18, 2011·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Q ChenJ Ni
Oct 28, 2018·Bioprocess and Biosystems Engineering·Jordi GabarróAugust Bonmatí
Jul 19, 2019·The Science of the Total Environment·Zhirong ZhaoMaosheng Zheng

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