Biofilm: A strategy for the dominance of comammox Nitrospira

Journal of Cleaner Production, Год журнала: 2022, Номер 363, С. 132361 - 132361

Опубликована: Май 24, 2022

Язык: Английский

---

Core fungal species strengthen microbial cooperation in a food-waste composting process

Environmental Science and Ecotechnology, Год журнала: 2022, Номер 12, С. 100190 - 100190

Опубликована: Май 29, 2022

In ecosystem engineering research, the contribution of microbial cooperation to function has been emphasized. Fungi are one predominant decomposers in composting, but thus far, less attention given fungal than bacterial cooperation. Therefore, network and cohesion analyses were combined reveal correlation between organic matter (OM) degradation ten composting piles. Positive cohesion, reflecting degree, was positively linked rate OM. From community perspective, core species (i.e.,

Язык: Английский

---

Nitrogen source influences the interactions of comammox bacteria with aerobic nitrifiers

Microbiology Spectrum, Год журнала: 2024, Номер 12(5)

Опубликована: Март 21, 2024

While the co-existence of comammox

Язык: Английский

---

Competition between ammonia-oxidizing archaea and complete ammonia oxidizers from freshwater environments

Applied and Environmental Microbiology, Год журнала: 2024, Номер unknown

Опубликована: Фев. 13, 2024

Nitrification is a key process in the global nitrogen cycle. Aerobic ammonia oxidizers play central role cycle by performing first step of nitrification. Ammonia-oxidizing archaea (AOA) and complete (comammox) are dominant nitrifiers environments with low ammonium availability. While AOA have been studied for almost 20 years, comammox were only discovered 8 years ago. Until now, there has gap our understanding whether can co-exist or if one strain would be under ammonium-limiting conditions. Here, we present study characterizing competition between freshwater varying substrate concentrations. Our results will help elucidating niches two lakes.

Язык: Английский

---

Journey of the swift nitrogen transformation: Unveiling comammox from discovery to deep understanding

Chemosphere, Год журнала: 2024, Номер 358, С. 142093 - 142093

Опубликована: Апрель 26, 2024

Язык: Английский

---

Effects of nitrogen and carbon source addition on biomass and protein production by Rhodopseudomonas via the RSM-CCD approach

Desalination and Water Treatment, Год журнала: 2024, Номер 319, С. 100438 - 100438

Опубликована: Май 31, 2024

Recycling biomass and generating value-added products, such as protein, from wastewater treatment using photosynthetic bacteria (PSB), represents a promising avenue for renewable resources. However, there are several crucial factors that can influence the efficiency of protein production in PSB. In this study, response surface methodology was employed to assess optimize effects carbon nitrogen sources on production, respectively. A three-factor central composite design (CCD) analysis revealed highest reaching 1.267 0.459 g/L, respectively, were achieved under optimal conditions 0.442% sodium acetate (X1), 0.577% bicarbonate (X2), 0.5105% fructose (X3). Another CCD focusing demonstrated corresponding 1.288 0.417 0.600% urea (X4), 0.679% ammonium sulfate (X5), 0.805% glutamate (X6). The experimental results predicted shown be very comparable, verifying predictability used models. This research provides basis developing green economic PSB process promoting widespread use recovery.

Язык: Английский

---

Comammox Nitrospira among dominant ammonia oxidizers within aquarium biofilter microbial communities

Applied and Environmental Microbiology, Год журнала: 2024, Номер 90(7)

Опубликована: Июль 24, 2024

ABSTRACT Nitrification by aquarium biofilters transforms ammonia waste (NH 3 /NH 4 + ) to less toxic nitrate (NO - via nitrite 2 ). Prior the discovery of complete ammonia-oxidizing (“comammox” or CMX) Nitrospira , previous research revealed that archaea (AOA) dominated over bacteria (AOB) in freshwater biofilters. Here, we profiled biofilter microbial communities and quantified abundance all three known oxidizers using 16S rRNA gene sequencing quantitative PCR (qPCR), respectively. Biofilter water samples were each collected from representative residential commercial saltwater aquaria. Distinct associated with Comammox amoA genes detected 38 (average CMX genes: 2.2 × 10 ± 1.5 copies/ng) dominant 30, whereas AOA present 35 1.1 2.7 only 7 them. The AOB at relatively low within 3.2 1 copies genes/ng DNA), except for highest concentration. For biofilters, differentially abundant, no comammox detected. Additional differential distributions, suggesting niche adaptation based on chemistry (e.g., ammonia, carbonate hardness, alkalinity). Network analysis demonstrated positive correlations between nitrifiers heterotrophs, metabolic ecological interactions These results demonstrate plays a previously overlooked, but important role home nitrification. IMPORTANCE is crucial process converts into harmful occurs found Our study currently groups aerobic oxidizers. findings reveal (comammox) high abundance, challenging our understanding We also highlight salinity. network significant among other community members, intricate communities. Overall, this expands nitrification emphasizes highlights value aquaria as microcosms studying nitrifier ecology.

Язык: Английский

---

Research progress and prospects of complete ammonia oxidizing bacteria in wastewater treatment

Frontiers of Environmental Science & Engineering, Год журнала: 2022, Номер 16(9)

Опубликована: Фев. 18, 2022

Abstract Complete ammonia oxidizing bacteria, or comammox bacteria (CAOB), can oxidize ammonium to nitrate on its own. Its discovery revolutionized our understanding of biological nitrification, and distribution in both natural artificial systems has enabled a reevaluation the relative contribution microorganisms nitrogen cycle. wide distribution, adaptation oligotrophic medium, diverse metabolic pathways, means extensive research CAOB application water treatment be promoted. Furthermore, energy-saving characteristics high oxygen affinity low sludge production may also become frontier directions for wastewater treatment. This paper provides an overview environmental CAOB, as well physiological microorganisms, such nutrient factors, enzymes, metabolism, focusing future Further should carried out analyze ecological niche impact explore potential cycle improvement.

Язык: Английский

---

Comammox rather than AOB dominated the efficient autotrophic nitrification-denitrification process in an extremely oxygen-limited environment

Water Research, Год журнала: 2024, Номер 268, С. 122572 - 122572

Опубликована: Окт. 2, 2024

Язык: Английский

---

Metagenome‐Assembled Genomes for Oligotrophic Nitrifiers From a Mountainous Gravelbed Floodplain

Environmental Microbiology, Год журнала: 2025, Номер 27(3)

Опубликована: Март 1, 2025

ABSTRACT Riparian floodplains are important regions for biogeochemical cycling, including nitrogen. Here, we present MAGs from nitrifying microorganisms, ammonia‐oxidising archaea (AOA) and comammox bacteria Slate River (SR) floodplain sediments (Crested Butte, CO, US). Additionally, explore potential nitrite‐oxidising (NOB) the Nitrospirales . AOA diversity in SR is lower than observed other western US Nitrosotalea ‐like lineages such as genus TA‐20 dominant AOA. No (AOB) were recovered. Microorganisms Palsa‐1315 (clade B comammox) most abundant ammonia‐oxidizers sediments. Established NOB conspicuously absent; however, recovered uncultured of NS‐4 family ( ) Nitrospiraceae that propose putative NOB. Nitrite oxidation may be carried out by organisms sister to established Nitrospira based on genomic content clades. Nitrifier harbour genes using alternative sources ammonia, urea, cyanate, biuret, triuret nitriles. The therefore appears a low ammonia flux environment selects oligotrophic nitrifiers.

Язык: Английский

---