Effect of aquaculture salinity on nitrification and microbial community in moving bed bioreactors with immobilized microbial granules

Gao Y 1 , Wang X 1 , Li J 1 , Lee CT 2 , Ong PY 3 , Zhang Z 1 Show all authors , Li C 4

Affiliations 

  • 1 School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • 2 School of Chemical & Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
  • 3 Innovation Center in Agritechnology For Advanced Bioprocessing (ICA), Universiti Teknologi Malaysia, 84600 Pagoh, Johor, Malaysia
  • 4 School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: cjli@sjtu.edu.cn
Bioresour Technol, 2020 Feb;297:122427.
PMID: 31784249 DOI: 10.1016/j.biortech.2019.122427

Abstract

The novel immobilized microbial granules (IMG) shows a significant effect of nitrification for freshwater aquaculture. However, there is lack of evaluation study on the performance of nitrification at high salinity due to the concentration of recycled water or seawater utilization. A laboratory scale moving bed bioreactor (MBBR) with IMG was tested on recycled synthetic aquaculture wastewater for the nitrification at 2.5 mg/L NH3-N daily. The results indicated that IMG showed a high salinity tolerance and effectively converted ammonia to nitrate up to 92% at high salinity of 35.0 g/L NaCl. As salinity increased from near zero to 35.0 g/L, the microbial activity of nitrite oxidation bacteria (NOB) in the IMG decreased by 86.32%. The microbial community analysis indicated that salinity significantly influenced the community structure. It was found that Nitrosomonas sp. and Nitrospira sp. were the dominant genera for ammonia oxidation bacteria (AOB) and NOB respectively at different salinity levels.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

MeSH terms
Similar publications