Ubiquitous occurrence and functional dominance of comammox Nitrospira in full-scale wastewater treatment plants

Zheng, Maosheng; Tian, Zhichao; Chai, Zimin; Zhang, Anqi; Gu, Ailu; Mu, Guangli; Wu, Dedong; Guo, Jianhua

doi:10.1016/j.watres.2023.119931

Cited by 24 publications

(3 citation statements)

References 56 publications

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“…In full-scale WWTPs, comammox bacteria (belong to comammox Nitrospira populations) are present at a low abundance (0.28%–0.64%). ,, In recent studies, the key parameters for enriching comammox bacteria were proposed including maintaining low DO (<1 mg/L), , prolonging SRT (>10 days), , and using antibiotics (ampicillin, kanamycin, lincomycin, and trimethoprim); meanwhile, attached growth coupled with sufficient DO concentrations (>2.5 mg/L) can be a feasible way to cultivate comammox bacteria. ,, Still, the knowledge on what is the determining factor for cultivation of comammox bacteria and how to selectively enrich comammox bacteria as well as enhance comammox bacteria activity in WWTPs is still lacking and requires study.…”

Section: Mainstream Nitrite Supply Driven By Novel Aoms and Nitrate R...mentioning

confidence: 99%

How to Provide Nitrite Robustly for Anaerobic Ammonium Oxidation in Mainstream Nitrogen Removal

Wang,

Li,

et al. 2023

Environ. Sci. Technol.

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Section: Mainstream Nitrite Supply Driven By Novel Aoms and Nitrate R...mentioning

confidence: 99%

How to Provide Nitrite Robustly for Anaerobic Ammonium Oxidation in Mainstream Nitrogen Removal

Wang,

Li,

et al. 2023

Environ. Sci. Technol.

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“…Comammox bacteria are routinely detected alongside strict ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) in both drinking water and wastewater systems (Cotto et al, 2020;Fowler et al, 2018;Pinto et al, 2015;Poghosyan et al, 2020;Roots et al, 2019;K. J. Vilardi et al, 2022;Wang et al, 2017;Yang et al, 2020;Zheng et al, 2023) but insights into the factors influencing their abundance, activity, and interactions in these environments are still limited.…”

Section: Introductionmentioning

confidence: 99%

“…For example, clade A1 comammox bacteria associated with Ca. Nitrospira nitrosa are typically found at higher abundances than canonical nitrifiers in some wastewater systems (Cotto 2020, Wang 2018, Xia 2018, Zheng 2023 and sometimes as the principal aerobic ammonia oxidizers in a wastewater system (Vilardi and Cotto 2023). In the latter situation, ammonia oxidation dominated by comammox bacteria could also adversely impact Nitrospira-NOB by limiting nitrite availability through complete nitrification to nitrate at low ammonia concentrations; however, the relationship between the two Nitrospira groups is not well understood.…”

Section: Introductionmentioning

confidence: 99%

Comammox bacterial preference for urea influences its interactions with aerobic nitrifiers

Vilardi

Johnston

Dai

et al. 2023

Preprint

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While the co-existence of comammox bacteria with canonical nitrifiers is well documented in diverse ecosystems, there is still a dearth of knowledge about the mechanisms underpinning their interactions. Understanding these interaction mechanisms is important as they may play a critical role in governing nitrogen biotransformation in natural and engineered ecosystems. In this study, we tested the ability of two environmentally relevant factors (nitrogen source and availability) to shape interactions between strict ammonia and nitrite-oxidizing bacteria and comammox bacteria in continuous flow column reactors. The composition of inorganic nitrogen species in reactors fed either ammonia or urea was similar during the lowest nitrogen loading condition (1 mg-N/L), but higher loadings (2 and 4 mg-N/L) promoted significant differences in nitrogen species composition and nitrifier abundances. The abundance and diversity of comammox bacteria were dependent on both nitrogen source and loading conditions as multiple comammox bacterial populations were preferentially enriched in the urea-fed system. In contrast, their abundance was reduced in response to higher nitrogen loadings in the ammonia-fed system likely due to ammonia-based inhibition. The preferential enrichment of comammox bacteria in the urea-fed system could be associated with their ureolytic activity calibrated to their ammonia oxidation rates thus minimizing ammonia accumulation to inhibitory levels. However, an increased abundance of comammox bacteria was not associated with a reduced abundance of nitrite oxidizers in the urea-fed system while a negative correlation was found between them in the ammonia-fed system; the latter dynamic likely emerging from reduced availability of nitrite to strict nitrite oxidizers at low ammonia loading conditions.

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Robust rehabilitation of anammox system by granular activated carbon under long-term starvation stress: Microbiota restoration and metabolic reinforcement

Zhang,

Al-Dhabi,

Gao

et al. 2024

Bioresource Technology

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Ubiquitous occurrence and functional dominance of comammox Nitrospira in full-scale wastewater treatment plants

Cited by 24 publications

References 56 publications

How to Provide Nitrite Robustly for Anaerobic Ammonium Oxidation in Mainstream Nitrogen Removal

How to Provide Nitrite Robustly for Anaerobic Ammonium Oxidation in Mainstream Nitrogen Removal

Comammox bacterial preference for urea influences its interactions with aerobic nitrifiers

Robust rehabilitation of anammox system by granular activated carbon under long-term starvation stress: Microbiota restoration and metabolic reinforcement

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