April 30, 2020

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Emily Anderson Coauthored a Paper on Denitrifiers from Woodchip Bioreactors in the Journal for Applied Microbiology

Emily Anderson (Minnesota) coauthored a paper entitled "Isolation and Characterization of Denitrifiers from Woodchip Bioreactors for Bioaugmentation Application" that was published in the Journal for Applied Microbiology on April 7, 2020.

Emily was the lead author, and her coauthors were Jeonghwan Jang, Rodney T. Venterea, Gary W. Feyereisen, and Satoshi Ishii.

Emily is a Staff Scientist based in Minnesota focused on bioremediation, environmental microbiology, and bioinformatics/data analysis. A remediation and water treatment practitioner, she is a key contributor to projects in industries including mining, agribusiness, manufacturing, and refining. Her prior experience includes work at New Zealand Petroleum and Minerals and the Ministry of Social Development.

Journal of Applied Microbiology publishes high quality full-length research and review papers on novel aspects of applied microbiology in relation to agriculture and soils, animals and animal health, biodefence, biotransformation, biodegradation and bioremediation, biotechnology (except where the principal thrust of the work is optimization), environment, food and beverages, medicine and public health, mycology (except where work is concerned with the macro-fungi), pharmacy, plants and plant health, probiotics and the intestine and water of all types.

The Society for Applied Microbiology is the oldest microbiology society in the UK, serving microbiologists around the world, and in partnership with Wiley, publishes five internationally acclaimed journals.


This study was done to obtain denitrifiers that could be used for bioaugmentation in woodchip bioreactors to remove nitrate from agricultural subsurface drainage water.

Methods and Results
We isolated denitrifiers from four different bioreactors in Minnesota and characterized the strains by measuring their denitrification rates and analyzing their whole genomes. A total of 206 bacteria were isolated from woodchips and thick biofilms (bioslimes) that formed in the bioreactors, 76 of which were able to reduce nitrate at 15°C. Among those, nine potential denitrifying strains were identified, all of which were isolated from the woodchip samples. Although many nitrate‐reducing strains were isolated from the bioslime samples, none were categorized as denitrifiers but instead as carrying out dissimilatory nitrate reduction to ammonium (DNRA).

Among the denitrifiers confirmed by 15N stable isotope analysis and genome analysis, Cellulomonas cellasea strain WB94 and Microvirgula aerodenitrificans strain BE2.4 appear to be promising for bioreactor bioaugmentation due to their potential for both aerobic and anaerobic denitrification, and the ability of strain WB94 to degrade cellulose.

Significance and Impact of Study
Denitrifiers isolated in this study could be useful for bioaugmentation application to enhance nitrate removal in woodchip bioreactors.

More Information

Learn more about the article: https://sfamjournals.onlinelibrary.wiley.com/doi/abs/10.1111/jam.14655 Learn more about Society for Applied Microbiology: https://sfam.org.uk/about/who-we-are.html
For consultation regarding denitrifiers, contact Emily Anderson at This email address is being protected from spambots. You need JavaScript enabled to view it..
Learn more about Emily Anderson at: https://www.linkedin.com/in/emily-anderson-59303085/