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Enrichment of high activity nitrifers to enhance partial nitrification process
Bioresource Technology, 2010Partial nitrification (PN) process is an essential pre-treatment to Anammox process for nitrogen removal from ammonium-rich wastewaters. High activity nitrifiers (HANs) are considered as the key to high-rate PN process. The HANs could be successfully enriched at free ammonia (FA) concentrations of 10-20 mg NH(3)-NL(-1), which differed significantly ...
Ping Zheng +4 more
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Nitrification and Coupled Nitrification‐Denitrification Associated with a Soil‐Manure Interface
Soil Science Society of America Journal, 1996AbstractNitrification and denitrification in soil often occur in close proximity so that a substantial part of the NO−3 formed by nitrification afterwards diffuses to the anaerobic denitrification zone where it is reduced to N2. The stable N isotope based isotope pairing method was used to study nitrification and coupled nitrification‐denitrification ...
Nielsen, Tommy Harder +2 more
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Nitrification and Denitrification
1996Nitrification is the conversion of inorganic or organic nitrogen from a reduced to a more oxidized state. Chemoautotrophic bacteria are largely or solely responsible for nitrification in soil with a pH above 5.5 (Focht and Verstraete 1977), at a lower pH there is evidence for the presence of acid-tolerant heterotrophic nitrifiers (Schimel et al. 1984).
Ellen Kandeler +3 more
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Symbiotic Aspects of Nitrification
Nature, 1946IN an interesting article on the symbiosis between myxobacteria and nitrifying bacteria, Imsenecki1 describes an observation which he made during his studies on the biology of myxobacteria, when he was able to isolate from a culture of Nitrosomonas, grown in its elective medium, a heterotrophic organism which he has named Sorangium symbioticum.
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Dominance of comammox Nitrospira in soil nitrification.
Science of the Total Environment, 2021Jiajie Hu +6 more
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Nitrification Inhibitors: Classes and Its Use in Nitrification Management
2014The explosive expansion of human activity during the last two centuries through industrial and agricultural pursuits has resulted in massive changes in the nitrogen (N) cycle of the planet. Based on the projected population growth and food demand, the N-fertilizer inputs into agricultural systems need to be doubled in the near future which would lead ...
Rajesh Kumar +3 more
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Chemical Engineering and Processing, 2018
Arsalan Sepehri, M. Sarrafzadeh
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Arsalan Sepehri, M. Sarrafzadeh
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Treatment Plants for Nitrification
1997Ordinary, municipal wastewater contains 20–50 mg/1 of nitrogen compounds, especially in the form of ammonium (NH 4 + and NH3) or organic compounds which are easily converted into ammonium in a treatment plant. There are three reasons why the presence of these compounds is not wanted in the treated wastewater, and why attempts are made to remove or ...
Poul Harremoës +2 more
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Nitrification in Wastewater Treatment
2011Microbial nitrification is a necessary step in removing nitrogen from wastewaters via biological denitrification and is becoming more important due to strict regulations on nitrogen discharge. However, microbial nitrification is recognized as being difficult to maintain in practical wastewater treatment plants (WWTPs) owing to the lower kinetics ...
Hisashi Satoh +3 more
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Nitrogen transformations in modern agriculture and the role of biological nitrification inhibition
Nature Plants, 2017D. Coskun +3 more
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