Evaluation of simultaneous nitrification and denitrification under controlled conditions by an aerobic denitrifier culture. (January 2015)

• Record Type: Journal Article
• Authors: Zhang, Yu; Shi, Zhuang; Chen, Mingxiang; Dong, Xiyang; Zhou, Jiti
• Is Part Of: Bioresource technology. Volume 175(2015)
• Page Start: 602
• Page End: 605
• Publication Date: 2015-01
• Subjects: Simultaneous nitrification and denitrification -- Paracoccus versutus -- Fe2+ solution -- C/N ratio -- NO2−-N; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2014.10.016
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Paracoccus versutus LYM could simultaneously remove NH4 + and NO3 − . Fe 2+ and carbon source benefit NO2 − further conversion. NH4 + was critical for P. versutus LYM reducing NO2 − . Abstract: Paracoccus versutus LYM was characterized with the ability of simultaneous nitrification and denitrification (SND) in presence of NH4 + -N and NO3 − -N (140 mg/L-N each). However, there was approximate 95.80 mg/L NO2 − -N left during SND process. Fe 2+ was added in the SND medium and it benefited bacterial growth and further converted NO2 − -N a little. Besides, remaining NO2 − -N could be completely reduced by adding carbon donors in presence of NH4 + -N and NO3 − -N, whose converting efficiencies also reached 97.09% and 96.34%, respectively. And N2 stayed as the main product of SND process. While NO2 − -N and NH4 + -N were present simultaneously, strain LYM could also remove nitrogen compounds thoroughly with sufficient carbon source. But there was no NO2 − -N reduced as sole nitrogen source in the medium even if C/N ratio reached as high as 30.