Sentences with word «nitrification»

Seasonal distribution of nitrifying bacteria and rates of nitrification in coastal marine sediments

Further subprograms are currently under development, including for the promotion of nitrification inhibitors used in combination with organic fertilizers (manure).

Global declines in oceanic nitrification rates as a consequence of ocean acidification.

N2O emissions are mainly caused by microbiological processes known as nitrification and denitrification.

«Surprise: One organism responsible for nitrification instead of two.»

This event will be jointly organized by the Climate and Clean Air Commission and the Commission for Interdisciplinary Ecological Studies of the Austrian Academy of Sciences, and is a public outreach event of the International Conference on Nitrification (ICoN).

The ca. 3,500 m3 per week of waste water generated by the factory (5,000 m ³ a week after expansion of the factory) is treated in a new primary clarifier, with the primary sludge sent to the RAPTOR ™ plant, followed by an existing Upflow Anaerobic Sludge Blanket (UASB) type of anaerobic reactor of 2,045 m ³, and further processed in a new nitrification / denitrification plant.

These include monitoring plants» uptake of fertilizer so it can be applied more efficiently, as well as switching to slow - release fertilizers, using cover crops to absorb excess nitrogen or applying nitrification inhibitors — chemicals that stop microbes from producing NOx.

Dr Pinto says: «The discovery of a single microorganism capable of full nitrification will have a significant impact on our understanding of the nitrogen cycle and on efforts to manage nitrogen pollution.

Furthermore, the current finding is of vital importance in processes like wastewater treatment, where nitrification helps to remove ammonia from the water.

Ocean acidification is also predicted to reduce microbial production of nitrate from ammonium (Beman et al., 2011), which could have major consequences for oceanic primary production because a significant fraction of the nitrate used by phytoplankton is generated by nitrification at the ocean surface (Yool et al., 2007).

Under normal conditions, mud shrimps enhance sediment nitrification rates, but at reduced seawater pH, this functionality rapidly declines.

Laverock, Bonnie; Kitidis, Vassilis; Tait, Karen; Gilbert, Jack; Osborn, A; Widdicombe, Stephen Nitrification is a key process in coastal sediments, contributing to the breakdown of organic matter and the recycling of nutrients in both the sediments and the overlying water.

However, microbial nitrification rates in seawater are dramatically inhibited by ocean acidification.

Nitrous oxide, a potent greenhouse gas also known as N2O, is released as a byproduct of the bacterial conversion of nitrogen in agricultural soils, the so - called nitrification and denitrification processes.

If denitrification is the cause of N2O emissions then ammonium is the best source of N. Nitrate based fertilizers are better when nitrification is the source of N2O emissions.

The approach is applicable not only to changes in fertilizer quantity (rate), but also fertilizer type, placement, timing, use of timedrelease fertilizers, use of nitrification inhibitors and other practice changes.

When the mixture is added to soil, it boosts the population of micro-organisms responsible for nitrification, which is essential for plant nutrition.

This oxidation process is known as nitrification.

Ammonium Oxidizing Bacteria Activity and Nitrification Rate in Oil Contaminated Wetland Soil under Remediation with Nutrient Supplements and Leguminous Plants

It could never be found until recently, in a fish tank a few floors below Radboud University's microbiology department: one single organism able to perform the complete process of nitrification.

The wastewater treatment plant with the anaerobic reactor (ANUBIXTM - B) at the right and the nitrification basin at the left

It consists of a primary clarifier, a UASB type of anaerobic reactor (ANUBIX ™ - B), a pre - and post denitrification, a nitrification and post aeration, a clarifier and a final DAF for phosphorous removal with iron chloride.

As a result, global change researchers will have to change their estimations on the nitrification potential in the global nitrogen cycle.»

But it was never linked to oxidizing ammonia to nitrite, the first step in the nitrification process.»

«We now have a better understanding of the environmental abundance of ammonia - oxidizing microorganisms and the process of nitrification.

Nitrification, the oxidation of ammonia via nitrite to nitrate, has always been considered to be a two - step process catalysed by chemolithoautotrophic microorganisms oxidising either ammonia or nitrite.

Nitrification is a special problem in Long Island Sound and the Chesapeake Bay, which have absorbed large amounts of nitrogen from coal - burning power plants in the Midwest.

In a greenhouse study, the nitrification inhibitor encapsulated calcium carbide (a slow - release source of acetylene) was added with 75, 150, and 225 mg of 75 atom % 15N urea - N to flooded pots containing 18 - day - old rice (Oryza sativa L.) plants.

nitrification the oxidation of ammonium salts to nitrites and the further oxidation of nitrites to nitrates

Due to their cost, however, these nitrification inhibitors are rarely deployed in Europe as well as worldwide.

Soil temperature affects the microbial processes of nitrification and denitrification with optimum temperature in the range of 15E C to 35E C. Also, the transport and release of N2O is affected by soil temperature.

Emissions of N2O are largely due to the microbial processes of nitrification and denitrification, which occur naturally in soils, freshwater systems and in the ocean.

Nitrogen mineralization and nitrification, both of which are important steps in the nitrogen cycle in soil, were also increased in areas invaded by kudzu.According to the computer model, the most extreme case of widespread kudzu growing over nonurban and nonagricultural soil would result in a greater than 25 percent increase in nitric oxide emissions from soil.