Assessment of Nitrate Removal Coupled with Fe (II) Oxidation and Analysis of Microbial Communities in a Moving-Bed Biofilm Reactor

ABSTRACT

A moving-bed biofilm reactor (MBBR) was used with an immobilized Pseudomonas sp. SZF15 strain in a Yu long filter (a novel bioactive carrier), which has the ability to remove nitrate and Fe (II) simultaneously. Optimum operating conditions were achieved with a nitrate removal ratio of 95.62% and an Fe (II) oxidation ratio of 88.09%. Meanwhile, high-throughput sequencing results confirmed that the immobilized Pseudomonas sp. SZF15 was not lost during the operation. This study lays the foundation for practical application of groundwater treatment.

KEYWORDS:

• Fe (II) oxidation
• high-throughput sequencing
• MBBR
• nitrate removal
• Pseudomonas sp.

Additional information

Funding

The study was funded by National Natural Science Foundation of China (NSFC) (No. 51678471) and the National Key Research and Development Project (NO.2016YFC0200706) and supported by Open Project of State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (NO.QA201518) and the Foundation for Creative Research Groups of China (50821002).