Structural integrity affects nitrogen removal activity of granules in semi-continuous reactors

Mota, César R.; Head, Melanie A.; Williams, Jon C.; Eland, Lucy E.; Ji, Cheng; Reyes, Francis L. de los

doi:10.1007/s10532-014-9712-3

Cited by 4 publications

(3 citation statements)

References 39 publications

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“…Nitrosomonas sp., such as N. mobilis, were the dominant microorganisms in wastewaters, activated sludge, and N removal applications in W W T P ( J u r e t s c h k o e t a l . 1 9 9 8 ; K o o p s a n d Pommerening-Röser 2001; Limpiyakorn et al 2013;Mota et al 2014), as well as in freshwater and river sediments impacted by wastewater effluent (Cébron et al 2004). Beiyun River is a typical seasonal river receiving municipal sewage and WWTP effluent from downtown throughout the whole year.…”

Section: Discussionmentioning

confidence: 99%

Abundance and distribution of ammonia-oxidizing microorganisms in the sediments of Beiyun River, China

2016

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Ammonia oxidation, driven by ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB), plays an important role in the global nitrogen cycle. However, the population and distribution of ammonia-oxidizing microorganisms in the sediments of urban rivers with intensive anthropogenic nitrogen inputs is still unclear. In this study, we compared the diversity and abundance of AOA and AOB in Beiyun River sediments from summer to winter. AOB dominated numerically over AOA and the abundance of both the amoA genes were much higher in winter than in summer, while AOA communities were more phylogenetically diverse than AOB in this study area. Phylogenetic analysis revealed that Nitrosospira sp. was the dominant AOB in summer, with Nitrosomonas sp. dominant in winter, while no specific genus was found for AOA in present study. The main pollutants and microbial communities in the sediments deriving from Yangwa Watergate were different from other sites. Clone libraries showed that a considerable percentage of amoA sequences matched closely with those from wastewater treatment plant (WWTP) systems. The seasonal change in nitrate content was significantly and positively related to the seasonal variation in amoA abundance (P < 0.05). Total nitrogen, total organic carbon, ammonium, and pH were the main environmental factors accounting for the difference in community composition of ammonia-oxidizing microorganisms in the sediments of Beiyun River. These findings suggest that effluent inputs, water gate operation, and seasonal changes might be key factors determining the abundance and distribution of AOB and AOA in the sediments of urban rivers.

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Section: Discussionmentioning

confidence: 99%

Abundance and distribution of ammonia-oxidizing microorganisms in the sediments of Beiyun River, China

2016

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“…The structure of AGS is dense and regular, with strong settling capabilities. Thanks to microorganisms’ inherent self-solidification properties, AGS maintains its structural integrity even under dynamic conditions, forming agglomerated organisms without swelling or negatively affecting water quality ( Mota et al, 2014 ). This characteristic enables AGS to efficiently remove high concentrations of toxic organic substances, nitrogen, and phosphorus ( Kishida et al, 2009 ; He et al, 2020 ; Chen H. Y. et al, 2023 ).…”

Section: Novel Bio-denitrification Processmentioning

confidence: 99%

Research progress of novel bio-denitrification technology in deep wastewater treatment

Huang,

Fu,

Zhang

et al. 2023

Front. Microbiol.

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Excessive nitrogen emissions are a major contributor to water pollution, posing a threat not only to the environment but also to human health. Therefore, achieving deep denitrification of wastewater is of significant importance. Traditional biological denitrification methods have some drawbacks, including long processing times, substantial land requirements, high energy consumption, and high investment and operational costs. In contrast, the novel bio-denitrification technology reduces the traditional processing time and lowers operational and maintenance costs while improving denitrification efficiency. This technology falls within the category of environmentally friendly, low-energy deep denitrification methods. This paper introduces several innovative bio-denitrification technologies and their combinations, conducts a comparative analysis of their denitrification efficiency across various wastewater types, and concludes by outlining the future prospects for the development of these novel bio-denitrification technologies.

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“…50 NOB_Nba were adjacent to AOB_Beta, probably because NOB_Nba needed to take in the NO 2 − generated from AOB_Beta. 46,51 Moreover, as NOB_Nba and AOB_Beta competed for the available O 2 , NOB_Nba lost out and was forced to attach to the AOB_Beta internally. 52 As shown in Figure 4c, DEN_Tb was concentrated in the interior of the composting particles, which suggested the denitrification due to DEN was an anaerobic reaction.…”

Section: Environmental Science and Technologymentioning

confidence: 99%

Multivariate and Multiscale Approaches for Interpreting the Mechanisms of Nitrous Oxide Emission during Pig Manure–Wheat Straw Aerobic Composting

Huang

et al. 2018

Environ. Sci. Technol.

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Nitrous oxide (NO) emission during composting causes nitrogen loss and air pollution. The interpretation of NO emission mechanisms will help to customize composting strategies that mitigate climate change. At pile and particle scales, this study characterized NO emission-related variables (gases, ions, and microbes) and their correlations during pig manure-wheat straw aerobic composting. Pile-scale results showed that NO emission mainly occurred in mesophilic, thermophilic, and cooling phases; the nitrification by ammonia-oxidizing bacteria ( AOB) and nitrite-oxidizing bacteria ( NOB) coexisted with the denitrification by denitrificans ( DEN); the major NOB and DEN were Nitrobacter ( NOB_Nba) and Thiobacillus denitrificans ( DEN_Tb), respectively. The mechanisms of nitrification, nitrifier denitrification, and anaerobic denitrification in composting particles were initially visualized by confocal laser scanning microscopy: Betaproteobacteria ( AOB_ Beta) sporadically distributed on the outer area of the particles, NOB_Nba internally attached to AOB_ Beta, and Nitrosomonas europea/ Nitrosomonas eutropha ( AOB_eu) and DEN_Tb concentrated in the interior. Correlation analysis of the variables showed that the distribution area of AOB_eu was proportional to NO emission ( R = 0.84); AOB not only participated in nitrification but also nitrifier denitrification, and NO formation was mainly from nitrifier denitrification by AOB_eu during the mesophilic-thermophilic phase and from denitrification by AOB_eu and DEN during the cooling phase.

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Structural integrity affects nitrogen removal activity of granules in semi-continuous reactors

Cited by 4 publications

References 39 publications

Abundance and distribution of ammonia-oxidizing microorganisms in the sediments of Beiyun River, China

Abundance and distribution of ammonia-oxidizing microorganisms in the sediments of Beiyun River, China

Research progress of novel bio-denitrification technology in deep wastewater treatment

Multivariate and Multiscale Approaches for Interpreting the Mechanisms of Nitrous Oxide Emission during Pig Manure–Wheat Straw Aerobic Composting

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