Recovering partial nitritation in a PN/A system during mainstream wastewater treatment by reviving AOB activity after thoroughly inhibiting AOB and NOB with free nitrous acid

Wang, Bo; Wang, Zenghua; Wang, Shanyun; Qiao, Xin; Gong, Xuzhong; Gong, Qingteng; Liu, Xuefan; Peng, Yongzhen

doi:10.1016/j.envint.2020.105684

Cited by 69 publications

(28 citation statements)

References 51 publications

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“…Furthermore, recent surveys revealed the presence of this NOB in four Danish enhanced biological phosphorus removal (EBPR) systems and an N-removal plant in China ( Speirs et al, 2019 ). Additionally, Nitrolancea- like 16S rRNA gene sequences have been found in reactors used for partial nitrification ( Yu et al, 2018 , 2020 ) and in free nitrous acid (FNA) treated wastewater ( Wang et al, 2020 ). However, so far it is unclear what the lower temperature limit for proliferation of this moderate thermophilic NOB is and if Nitrolancea is present and active in full-scale nitrifying sludge systems especially as activated sludge does not contain ammonium or nitrite in the high concentrations apparently required by Nitrolancea to be competitive.…”

Section: Introductionmentioning

confidence: 99%

Defining Culture Conditions for the Hidden Nitrite-Oxidizing Bacterium Nitrolancea

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Defining Culture Conditions for the Hidden Nitrite-Oxidizing Bacterium Nitrolancea

et al. 2020

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“…The Microtrichales ASV 904c34 consistently developed only under the CTN conditions as well. Microtrichaceae are found in systems in which NH 4 + is oxidized with NO 2 − via the anammox system [ 45 ]. Methyloligellaceae ee5ce9 (Rhizobiales) are methanotrophs [ 46 ], which flourished most under TCN.…”

Section: Resultsmentioning

confidence: 99%

Teasing apart the host-related, nutrient-related and temperature-related effects shaping the phenology and microbiome of the tropical seagrass Halophila stipulacea

Szitenberg

Beca‐Carretero

Azcárate-García

et al. 2022

Environmental Microbiome

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Background Halophila stipulacea seagrass meadows are an ecologically important and threatened component of the ecosystem in the Gulf of Aqaba. Recent studies have demonstrated correlated geographic patterns for leaf epiphytic community composition and leaf morphology, also coinciding with different levels of water turbidity and nutrient concentrations. Based on these observations, workers have suggested an environmental microbial fingerprint, which may reflect various environmental stress factors seagrasses have experienced, and may add a holobiont level of plasticity to seagrasses, assisting their acclimation to changing environments and through range expansion. However, it is difficult to tease apart environmental effects from host-diversity dependent effects, which have covaried in field studies, although this is required in order to establish that differences in microbial community compositions among sites are driven by environmental conditions rather than by features governed by the host. Results In this study we carried out a mesocosm experiment, in which we studied the effects of warming and nutrient stress on the composition of epiphytic bacterial communities and on some phenological traits. We studied H. stipulacea collected from two different meadows in the Gulf of Aqaba, representing differences in the host and the environment alike. We found that the source site from which seagrasses were collected was the major factor governing seagrass phenology, although heat increased shoot mortality and nutrient loading delayed new shoot emergence. Bacterial diversity, however, mostly depended on the environmental conditions. The most prominent pattern was the increase in Rhodobacteraceae under nutrient stress without heat stress, along with an increase in Microtrichaceae. Together, the two taxa have the potential to maintain nitrate reduction followed by an anammox process, which can together buffer the increase in nutrient concentrations across the leaf surface. Conclusions Our results thus corroborate the existence of environmental microbial fingerprints, which are independent from the host diversity, and support the notion of a holobiont level plasticity, both important to understand and monitor H. stipulacea ecology under the changing climate.

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“…Concomitantly, Microtrchales, and Microtrichaceae in particular, also prevailed particularly under the CTN scenario. Microtrichaceae were found to be highly abundant in a partial nitrification -anammox system, where partial nitrification, such as that carried out by Roseobacter, produces NO 2 -, which is then used by Microtrichaceae to oxidize NH 4 + [45]. Therefore, the dynamics of these microorganisms may serve as a buffer allowing H. stipulacea to cope with nitrogen enriched environments.…”

Section: Discussionmentioning

confidence: 99%

“…The Microtrichales ASV 904c34 consistently developed only under the CTN conditions as well. Microtrichaceae can oxidize NH 4 + with NO 2 via the anammox system [45]. Methyloligellaceae ee5ce9 (Rhizobiales) are methanotrophs [46], which flourished most under TCN.…”

Section: Dynamics Of Key Asvsmentioning

confidence: 99%

Teasing apart the host-related, nutrient-related and temperature-related effects shaping the phenology and microbiome of the tropical seagrassHalophila stipulacea

Szitenberg

Beca‐Carretero

Azcárate-García

et al. 2021

Preprint

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BackgroundHalophila stipulacea seagrass meadows are an ecologically important and threatened component of the ecosystem in the Gulf of Aqaba. Recent studies have demonstrated correlated geographic patterns for leaf endophytic community composition and leaf morphology, also coinciding with different levels of water turbidity and nutrient concentrations. Based on these observations, workers have suggested an environmental microbial fingerprint, which may reflect various environmental stress factors seagrasses have experienced, and may add a holobiont level of plasticity to seagrasses, assisting their acclimation to changing environments and through range expansion. However, it is difficult to tease apart environmental effects from host-diversity dependent effects, which have covaried in field studies, although this is required in order to establish that differences in microbial community compositions among sites are driven by environmental conditions rather than by features governed by the host.ResultsIn this study we carried out a mesocosm experiment, in which we studied the effects of warming and nutrient stress on the composition of epiphytic bacterial communities and on some phenological traits. We studied H. stipulacea collected from two different meadows in the Gulf of Aqaba, representing differences in the host and the environment alike. We found that the source site from which seagrasses were collected was the major factor governing seagrass phenology, although heat increased shoot mortality and nutrient loading delayed new shoot emergence. Bacterial diversity, however, mostly depended on the environmental conditions. The most prominent pattern was the increase in Rhodobacteraceae under nutrient stress without heat stress, along with an increase in Microtrichaceae. Together, the two taxa have the potential to maintain nitrate reduction followed by an anammox process, which can together buffer the increase in nutrient concentrations across the leaf surface.ConclusionsOur results thus corroborate the existence of environmental microbial fingerprints, which are independent from the host diversity, and support the notion of a holobiont level plasticity, both important to understand and monitor H. stipulacea ecology under the changing climate.

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Recovering partial nitritation in a PN/A system during mainstream wastewater treatment by reviving AOB activity after thoroughly inhibiting AOB and NOB with free nitrous acid

Cited by 69 publications

References 51 publications

Defining Culture Conditions for the Hidden Nitrite-Oxidizing Bacterium Nitrolancea

Defining Culture Conditions for the Hidden Nitrite-Oxidizing Bacterium Nitrolancea

Teasing apart the host-related, nutrient-related and temperature-related effects shaping the phenology and microbiome of the tropical seagrass Halophila stipulacea

Teasing apart the host-related, nutrient-related and temperature-related effects shaping the phenology and microbiome of the tropical seagrassHalophila stipulacea

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