SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (10): 1712-1715.DOI: 10.1016/j.cjche.2015.08.018

• 能源、资源与环境技术 • 上一篇    下一篇

Biological treatment of high NH4+-N wastewater using an ammonia-tolerant photosynthetic bacteria strain (ISASWR2014)

Qin Zhou, Guangming Zhang, Xiang Zheng, Guohua Liu   

  1. School of Environment & Natural Resource, Renmin University of China, Beijing 100872, China
  • 收稿日期:2014-12-15 修回日期:2015-06-17 出版日期:2015-10-28 发布日期:2015-11-27
  • 通讯作者: Guangming Zhang
  • 基金资助:

    Supported by the National Natural Science Foundation of China (51278489).

Biological treatment of high NH4+-N wastewater using an ammonia-tolerant photosynthetic bacteria strain (ISASWR2014)

Qin Zhou, Guangming Zhang, Xiang Zheng, Guohua Liu   

  1. School of Environment & Natural Resource, Renmin University of China, Beijing 100872, China
  • Received:2014-12-15 Revised:2015-06-17 Online:2015-10-28 Published:2015-11-27
  • Supported by:

    Supported by the National Natural Science Foundation of China (51278489).

摘要: Wastewaterwith high NH4+-N is difficult to treat by traditional methods. So in this paper, a wild strain of photosynthetic bacteria was used for high NH4+-N wastewater treatment together with biomass recovery. Isolation, identification, and characterization of the microorganism were carried out. The strain was inoculated to the biological wastewater treatment unit. The impacts of important factorswere examined, including temperature, dissolved oxygen, and light intensity. Results showed that photosynthetic bacteria could effectively treat high NH4+- Nwastewater. Forwastewaterwith NH4+-N of 2300 mg · L-1, COD/N=1.0, 98.3% of COD was removed, and cell concentration increased by 43 times. The optimal conditions for the strain's cell growth and wastewater treatment were 30 ℃, dissolved oxygen of 0.5-1.5 mg · L-1 and a light intensity of 4000 lx. Photosynthetic bacteria could bear a lower C/N ratio than bacteria in a traditionalwastewater treatment process, but the NH4+-N removal was only 20%-40% because small molecule carbon source was used prior to NH4+-N. Also, the use of photosynthetic bacteria in chickenmanurewastewater containingNH4+-Nabout 7000mg· L-1 proved that photosynthetic bacteria could remove NH4+-N in a real case, finally, 83.2% of NH4+-N was removed and 66.3% of COD was removed.

关键词: High NH4+-N wastewater, C/N, Photosynthetic bacteria, Chicken manure wastewater

Abstract: Wastewaterwith high NH4+-N is difficult to treat by traditional methods. So in this paper, a wild strain of photosynthetic bacteria was used for high NH4+-N wastewater treatment together with biomass recovery. Isolation, identification, and characterization of the microorganism were carried out. The strain was inoculated to the biological wastewater treatment unit. The impacts of important factorswere examined, including temperature, dissolved oxygen, and light intensity. Results showed that photosynthetic bacteria could effectively treat high NH4+- Nwastewater. Forwastewaterwith NH4+-N of 2300 mg · L-1, COD/N=1.0, 98.3% of COD was removed, and cell concentration increased by 43 times. The optimal conditions for the strain's cell growth and wastewater treatment were 30 ℃, dissolved oxygen of 0.5-1.5 mg · L-1 and a light intensity of 4000 lx. Photosynthetic bacteria could bear a lower C/N ratio than bacteria in a traditionalwastewater treatment process, but the NH4+-N removal was only 20%-40% because small molecule carbon source was used prior to NH4+-N. Also, the use of photosynthetic bacteria in chickenmanurewastewater containingNH4+-Nabout 7000mg· L-1 proved that photosynthetic bacteria could remove NH4+-N in a real case, finally, 83.2% of NH4+-N was removed and 66.3% of COD was removed.

Key words: High NH4+-N wastewater, C/N, Photosynthetic bacteria, Chicken manure wastewater