Abstract. Microorganisms carrying out denitrification in marine anoxic zones drive bioavailable nitrogen loss. Sequencing datasets have demonstrated the mo

The IC50 of sulfur autotrophic denitrifying microorganisms to DBA wastewater is 17.09% (v/v), with 0.25 mm to 0.30 mm sulfur particles being ideal for upflow reactors. In SBRs, the maximum DBA wastew....

Abstract. Microorganisms carrying out denitrification in marine anoxic zones drive bioavailable nitrogen loss. Sequencing datasets have demonstrated the mo

The contribution of fungal denitrification to emissions of the greenhouse gas nitrous oxide (N2O) from soil remains elusive. Understanding fungal deni…

Wastewater superintendent Amy Law presented draft watershed plans that map where sewers, denitrifying septic systems and other strategies would be required to meet state TMDL nitrogen limits; the town aims to finalize internal drafts by end of 2026 and submit permit applications 2027–2030.

Today’s guest blog post comes from Pooja Timilsina. Timilsina is starting her second year as a Graduate Research Assistant in the Department of Natural Resource Ecology and Management at Iowa State University. Nitrate loading into waterways remains one of Iowa’s greatest water quality challenges, given the state's extensive subsurface tile drainage system. One of the emerging edge-of-field conservation practices that intercepts this water and converts nitrate to nitrogen gas before it mixes with downstream water is the denitrifying woodchip bioreactor.

Graphical abstract showing that heterotrophic and lithotrophic denitrifying microorganisms contribute to the turnover of nitrate in the carbonate aquifer o

Falmouth’s health agent and water superintendent told the planning board that denitrifying on-site systems are not equivalent to sewer and that the town’s water withdrawal permits and wastewater nitrogen budgets constrain broad density increases. Officials urged coordination before adopting zoning changes that would raise housing density.

Newswise — The study found that inoculating organic fertilizers with the denitrifying bacterium Pseudomonas stutzeri NRCB010 significantly lowered cumulative soil N₂O emissions, with the strongest effect observed when the bacterium was combined with mushroom residue organic manure. This combination achieved a 46.5% emission reduction, outperforming hydrochar organic manure and high-temperature pretreated compost. Greenhouse vegetable production relies on intensive fertilizer and water inputs to sustain high yields, but these practices can accelerate nitrogen losses and increase N₂O emissions. Organic fertilizers are widely used to improve soil structure, nutrient supply, and crop quality, yet they may also provide substrates that stimulate N₂O production. Current mitigation approaches include nitrification inhibitors, biochar, and plant growth-promoting rhizobacteria (PGPR), but the compatibility between functional bacteria and different organic fertilizer substrates remains insufficiently understood. Therefore, systematic research is needed to determine which microbe–organic fertilizer combinations can reduce emissions while maintaining soil function. A study (DOI: 10.48130/nc-0026-0001) published in Nitrogen Cycling on 04 February 2026 by Weishou Shen’s team, Nanjing University of Information Science and Technology, shows that NRCB010, especially when paired with mushroom residue organic manure, reduces N₂O emissions by enhancing nosZI-related microbial functions and reshaping the soil microbiome. The researchers conducted a soil microcosm experiment using...

In this novel originally published in 1923, as denitrifying bacteria inimical to plant growth spreads around the world, toppling civilizations and threatenin...

Abstract. Clubroot, caused by the protist pathogen Plasmodiophora brassicae, is a major threat to cruciferous crop production worldwide. Although plant mic

Please join us for the Iowa Learning Farms webinar at noon CDT, Wednesday, May 20, featuring Taylor Vroman, Ph.D., graduate research assistant, Iowa State University. Vroman’s research at Iowa State University focused on improving the efficiency of denitrifying bioreactors for water quality management. She will be joining AgOutcomes, a wholly owned subsidiary of the Iowa Soybean Association, as a data solutions analyst in late May 2026.

Please join us for the Iowa Learning Farms webinar at noon CDT, Wednesday, May 20, featuring Taylor Vroman, Ph.D., graduate research assistant, Iowa State University. Vroman’s research at Iowa State University focused on improving the efficiency of denitrifying bioreactors for water quality management. She will be joining AgOutcomes, a wholly owned subsidiary of the Iowa Soybean Association, as a data solutions analyst in late May 2026.

Corn cobs provided the most persistent dual nutrient removal in denitrifying bioreactors operated for 390 days, achieving the highest nitrate and phosphate load reductions with minimal performance de...

Nitrous oxide (N2O) contributes to stratospheric ozone depletion and global warming. Knowledge about microbial formation and consumption of N2O in...

This study investigated the coexistence, dynamics, and denitrifying activities of Accumulibacter-like DPAO subgroups (clades) in response to nitrate recycle ratios in a lab-scale IFAS-EBPR system. Bo....

The Forest-to-Farm effort If you’re a regular reader of the ILF Blog, you’ve most likely heard of the Forest-to-Farm effort, an interdisciplinary research-extension effort aimed at increased denitrifying woodchip bioreactor adoption while simultaneously addressing a range of issues facing Iowa’s woodlands and forest products industry. Started in 2019 as a First Year Honors Mentor Program project (budget of $250), the effort has since expanded to ~$1.5 million through combined funding from the US Forest Service, USDA NIFA, NRCS, and the Iowa Nutrient Research Center – each award focusing on individual, yet interrelated, components of the bioreactor system and woodchip supply chain.