Isolation and characteristic of an aerobic denitrifier with high nitrogen removal efficiency | Zendy

Liang Cheng | Zendy; Min Zhao | Zendy; Lu Lei | Zendy; Lei Wang | Zendy; Zhao Li Yan | Zendy; Liu Wen Jin | Zendy

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Isolation and characteristic of an aerobic denitrifier with high nitrogen removal efficiency

Author(s) -

Liang Cheng,

Min Zhao,

Lu Lei,

Lei Wang,

Zhao Li Yan,

Liu Wen Jin

Publication year - 2011

Publication title -

african journal of biotechnology

Language(s) - English

Resource type - Journals

ISSN - 1684-5315

DOI - 10.5897/ajb11.569

Subject(s) - paracoccus denitrificans , aerobic denitrification , nitrification , chemistry , denitrification , heterotroph , environmental chemistry , nitrite , nitrogen , nitrate , denitrifying bacteria , bacteria , biochemistry , biology , organic chemistry , enzyme , genetics

Paracoccus denitrificans DL-23, isolated from aerobic domesticated activated sludge, was demonstrated to have high ability of denitrification and heterotrophic nitrification under aerobic condition. After optimization (succinate, COD/N 10, 37°C, 160 rpm), DL-23 removed 420 and 860 mg/l NO3 -N within 36 to 60 h of growth, respectively. DL-23 also removed 380 mg/l NH4 -N within 24 h with ammonia as nitrogen source. The maximum removal rate was 30.3 mg/l·h. Meanwhile, DL-23 exhibited aerobic nitrite reduction ability with 658 mg/l NO2 -N within 48 h.

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