Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7067830 | Bioresource Technology | 2018 | 8 Pages |
Abstract
A novel heterotrophic nitrification-aerobic denitrification bacterium, identified as Janthinobacterium sp. M-11, was isolated from the Songhua River. When the initial ammonium concentration was 5â¯mg·Lâ1, 98% of ammonium was removed under cold condition (2â¯Â°C) with the C/N ratio of 5 at initial pH 7 and aerobic condition, which demonstrated the significant ammonium removal capacity of M-11 with low nutrient consumption at cold temperature. Denitrification processes under aerobic and anaerobic conditions were also investigated. 89% of nitrite and 89% of nitrate were removed under aerobic condition. Under anaerobic condition, 93% of nitrite and 98% of nitrate were removed. Interestingly, a high amount of nitrite accumulation was observed in the mid-stage of anaerobic denitrification for nitrate. This special phenomenon was probably because of the existence of narG gene amplified in the strain M-11, which would encode membrane-bound nitrate reductase and accelerate the nitrate conversion rate of M-11 under anaerobic condition.
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Authors
Mo Yang, Dongwei Lu, Bida Qin, Qianliang Liu, Yumeng Zhao, Huiling Liu, Jun Ma,