Results 31 to 40 of about 23,282 (244)

Energy-Efficient Single-Stage Nitrite Shunt Denitrification with Saline Sewage through Concise Dissolved Oxygen (DO) Supply: Process Performance and Microbial Communities

Microorganisms, 2020
Single-stage nitrite shunt denitrification (through nitrite rather than nitrate) with low dissolved oxygen (DO) supply is a better alternative in terms of energy-efficiency, short-footprint, and low C/N-ratio requirement.
Huichuan Zhuang, Zhuoying Wu, Linji Xu, Shao-Yuan Leu, Po-Heng Lee   +4 more
doaj   +1 more source

Activity-Based Cell Sorting Reveals Resistance of Functionally Degenerate Nitrospira during a Press Disturbance in Nitrifying Activated Sludge

mSystems, 2021
Nitrogen removal from activated sludge wastewater treatment systems is an energy-intensive process due to the large aeration requirement for nitrification. This energy footprint could be minimized with engineering control strategies that wash out nitrite-
Maxwell B. W. Madill, Yaqian Luo, Pranav Sampara, Ryan M. Ziels   +3 more
doaj   +1 more source

A generally applicable cryopreservation method for nitrite-oxidizing bacteria

Systematic and Applied Microbiology, 2013
Nitrite-oxidizing bacteria are key members of the global nitrogen cycle but their study is hampered by their limited availability in culture, mostly due to laborious cultivation procedures and the lack of stable preservation methods. In this study, it was demonstrated that long-term cryopreservation of nitrite-oxidizing bacteria assigned to the genera ...
Bram, Vekeman, Sven, Hoefman, Paul, De Vos, Eva, Spieck, Kim, Heylen   +4 more
openaire   +3 more sources

Nitrogen removal by autotrophic ammonium oxidizing bacteria enrichment under anaerobic conditions [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2008
Sludge from an anoxic tank at the centralized wastewater treatment plant, Nong Khaem, Bangkok, Thailand, was inoculatedin an anaerobic sequencing batch reactor (ASBR). The optimal compositions and operating conditions of the stock of autotrophic ammonium
Pongsak (Lek) Noophan, Chalermraj Wantawin, Siriporn Sripiboon, Sanya Sirivitayapakorn   +3 more
doaj  

Diverse electron sources support denitrification under hypoxia in the obligate methanotroph Methylomicrobium album strain BG8

Frontiers in Microbiology, 2015
Aerobic methane-oxidizing bacteria are a diverse group of microorganisms that are ubiquitous in natural environments. Along with anaerobic methane-oxidizing bacteria and archaea, aerobic methanotrophs are critical for attenuating emission of methane to ...
K. Dimitri eKits, Dustin J Campbell, Albert eRemus Rosana, Lisa Y Stein   +3 more
doaj   +1 more source

Fatty Acid Profiles of Nitrite-oxidizing Bacteria Reflect theirPhylogenetic Heterogeneity [PDF]

Systematic and Applied Microbiology, 2001
The fatty acid profiles of all described species of the nitrite-oxidizing genera Nitrobacter, Nitrococcus, Nitrospina and Nitrospira were analyzed. The four genera had distinct profiles, which can be used for the differentiation and allocation of new isolates to these genera.
A, Lipski, E, Spieck, A, Makolla, K, Altendorf   +3 more
openaire   +4 more sources

Unlocking a Nitrosuccinate Lyase for Decarboxylative Enzymatic Hydronitration

Angewandte Chemie, EarlyView.
The nitrosuccinate lyase CreD catalyzes C–NO2 bond formation using nitrite in water and shows synthetic practicality with high turnover numbers up to 102,000. A combination of protein engineering and computational methods helped to reveal the mechanistic principles that underpin this unique enzymatic activity.
Matteo Aleotti, Hannah Dreisbach, Rémi Corlay, Clara Weber, Tamara Reiter, Wael Elaily, Bastian Daniel, Klaus Zangger, Pedro A. Sánchez‐Murcia, Mélanie Hall   +9 more
wiley   +2 more sources

Efficient management of the nitritation-anammox microbiome through intermittent aeration: absence of the NOB guild and expansion and diversity of the NOx reducing guild suggests a highly reticulated nitrogen cycle

Environmental Microbiome, 2022
Obtaining efficient autotrophic ammonia removal (aka partial nitritation-anammox, or PNA) requires a balanced microbiome with abundant aerobic and anaerobic ammonia oxidizing bacteria and scarce nitrite oxidizing bacteria.
Alejandro Palomo, Daniela Azevedo, María Touceda-Suárez, Carlos Domingo-Félez, A. Gizem Mutlu, Arnaud Dechesne, Yulin Wang, Tong Zhang, Barth F. Smets   +8 more
doaj   +1 more source

Coexistence of nitrifying, anammox and denitrifying bacteria in a sequencing batch reactor

Frontiers in Microbiology, 2014
Elevated nitrogen removal efficiencies from ammonium-rich wastewaters have been demonstrated by several applications, that combine nitritation and anammox processes. Denitrification will occur simultaneously when organic carbon is also present.
Michela eLangone, Jia eYan, Jia eYan, Suzanne Caroline Marianne Haaijer, Huub J.M. Op Den Camp, Mike eJetten, Gianni eAndreottola   +6 more
doaj   +1 more source

Mutual Interaction between Temperature and DO Set Point on AOB and NOB Activity during Shortcut Nitrification in a Sequencing Batch Reactor in Terms of Energy Consumption Optimization

Energies, 2020
Recently, many wastewater treatment plants (WWTPs) have had to deal with serious problems related to the restrictive requirements regarding the effluent quality, as well as significant energy consumption associated with it.
Mehdi Sharif Shourjeh, Przemysław Kowal, Jakub Drewnowski, Bartosz Szeląg, Aleksandra Szaja, Grzegorz Łagód   +5 more
doaj   +1 more source