Water pollution has become increasingly serious, and the main pollutant in most water bodies is nitrogen. Microbial nitrification/denitrification is one of the most effective nitrogen removal pathways for wastewater.
Generally, the traditional processes of microbial nitrogen removal include two parts: aerobic nitrification and anaerobic denitrification. Nitrification and denitrification can be carried out simultaneously in one reactor by a class of microorganisms—heterotrophic nitrification-aerobic denitrification (HN-AD) bacteria.
A research group led by Prof. Wu Jinshui from the Institute of Subtropical Agriculture (ISA) of the Chinese Academy of Sciences isolated a novel heterotrophic nitrification-aerobic denitrification bacterium—Alcaligenes faecalis WT14, which has the potential to treat high-ammonium wastewater.
The study was published in Journal of Environmental Management on Jan. 16.
The researchers found WT14 could tolerate high concentration ammonia nitrogen (NH4+-N) up to 2000 mg·L-1 and had an efficient NH4+-N removal rate of 55.9 mg·L-1·h-1.
Unlike other Alcaligenes faecalis species, WT14 could efficiently remove high concentration nitrate (NO3—N) or nitrite (NO2—N) when they are the sole nitrogen sources.
These results implied that WT14 is a novel Alcaligenes faecalis strain and has the potential for treating wastewater containing high-strength NH4+-N, NO3—N, or NO2—N.
Researchers quantify ecosystem-scale nitrification rate
Junli Chen et al. Nitrogen removal characteristics of a novel heterotrophic nitrification and aerobic denitrification bacteria, Alcaligenes faecalis strain WT14, Journal of Environmental Management (2021). DOI: 10.1016/j.jenvman.2021.111961
Novel microorganism has potential to treat high-ammonium wastewater (2021, February 23)
retrieved 23 February 2021
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.
Read original article here