Differences of bacterial communities in two full-scale A2/O municipal wastewater treatment plants and their effects on effluent total nitrogen removal

Xiang, Jinhao; Wang, Cong; Lv, Weiming; Liu, Ying; Jie, Sun; Gong, Tian-Yi

doi:10.1016/j.eti.2020.101317

Cited by 9 publications

(7 citation statements)

References 40 publications

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“…This is consistent with previous studies, indicat-ing that Proteobacteria are widely spread in full-scale WWTPs [2,15,17]. Proteobacteria have five major classes, including Alphaproteobacteria, Betaproteobacteria, Deltaproteobacteria, Gammaproteobacteria, and Epsilonproteobacteria, which were generally detected in the other WWTPs [18]. In this study, Gammaproteobacteria accounted for the most significant proportion of 15.62-18.45% in the four samples, followed by Alphaproteobacteria (8.64-11.44%).…”

Section: Bacterial Community Structuresupporting

confidence: 92%

“…These two indexes both indicate that the diversity of the anaerobic zone is highest. Additionally, the total number of OTUs in the anaerobic, anoxic, aerobic, and return units were 1182, 1232, 1193, and 1256 respectively, which was slightly lower than in other municipal WWTPs (1361-2599) [17,18]. Compared with the Chao and Shannon indexes of 870-1207 and 4.57-5.17 in a temperate [19], subtropical [20] and plateau [21] WWTPs, the Haikou sewage treatment plant has a higher diversity because some temperature-sensitive microorganisms cannot survive in cold environments.…”

Section: Bacterial Community Diversitymentioning

confidence: 68%

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Bacterial Community Composition and Function in a Tropical Municipal Wastewater Treatment Plant

Xiang

et al. 2022

Water

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Bacterial diversity and community composition are of great importance in wastewater treatment; however, little is known about the diversity and community structure of bacteria in tropical municipal wastewater treatment plants (WWTPs). Therefore, in this study, activated sludge samples were collected from the return sludge, anaerobic sludge, anoxic sludge, and aerobic sludge of an A2O WWTP in Haikou, China. Illumina MiSeq high-throughput sequencing was used to examine the 16S ribosomal RNA (rRNA) of bacteria in the samples. The microbial community diversity in this tropical WWTP was higher than in temperate, subtropical, and plateau WWTPs. Proteobacteria, Bacteroidota, Patescibacteria, and Chloroflexi were the dominant phyla. Nitrification bacteria Nitrosomonas, and Nitrospira were also detected. Tetrasphaera, instead of Candidatus Accumulibacter, were the dominant polyphosphate accumulating organisms (PAOs), while, glycogen accumulating organisms (GAOs), such as Candidatus Competibacter and Defluviicoccus were also detected. The bacterial community functions predicted by PICRUSt2 were related to metabolism, genetic information processing, and environmental information processing. This study provides a reference for the optimization of tropical municipal WWTPs.

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Section: Bacterial Community Structuresupporting

confidence: 92%

Section: Bacterial Community Diversitymentioning

confidence: 68%

Bacterial Community Composition and Function in a Tropical Municipal Wastewater Treatment Plant

Xiang

et al. 2022

Water

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“…During this process of electrons transfer from the donor to the acceptor, these organisms get energy which can be utilized for the synthesis of a new cell mass and the repairs of the existing cell mass (Hendriks et al, 2000). Dechloromonas, Ignavibacterium, Nitrospira and Thauera are the most abundant microbial genera in the A 2 /O sludge (Kim et al, 2013;Xiang et al, 2021). The extracellular enzymes excreted by the microorganisms can hydrolyze cellulose and hemicellulose into soluble and small molecule substrates, which can be used by microbes during the denitrificationprocess (Her and Huang, 1995;Sun et al, 2019).…”

Section: Denitrification Microbiologymentioning

confidence: 99%

A review on application of external carbon sources for denitrification for wastewater treatment

2022

Global NEST: The International Journal

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<p>With the increase in industrial and agricultural activities, huge amount of wastewater containing nitrogen is produced. Biological denitrification is currently the most widely used, sustainable and cost-effective process to remove nitrogen from wastewater. In biological denitrification, application of external carbon sources for denitrification is important because it is the way to boost the denitrification process and it is necessary for wastewater treatment plants that have to meet very stringent effluent nitrogen limits. This review study focused with treatment of wastewater using biological denitrification as advantages. This also deals with advantages of different external carbon sources with emphasis on biological denitrification as the cost of biological denitrification is controlled by the carbon source because the cost of biological denitrification is controlled by the carbon source.. Hence, use of alternative carbon sources such as agricultural wastes, and food waste is reviewed in this paper. This study recommend other waste material such as textile waste can be a part of denitrification because carbon source such as methanol, ethanol and acetic acid/acetate can be recovered from textile waste.</p>

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“…To conduct operations for nitrogen removal, the microbiota of the nitrogen removal processes is examined. Nitrospira , Thauera , Dechloromonas , and Ignavibacterium are the most abundant microbial genera in the A 2 /O sludge ( Kim et al, 2013 ; Xiang et al, 2021 ). Further, Nitrosomonas , Nitrospira , and Nitrobacter have been identified as the key taxa for nitrite oxidation ( Wang et al, 2019 ; Li et al, 2020a ; Feng et al, 2021 ; Zhou et al, 2021 ), and Truepera, Paracoccus , and Denitratisoma were found to primarily carry out denitrification ( Wang et al, 2019 ; Deng et al, 2020 ; Li et al, 2020a ; Wang et al, 2020b ).…”

Section: Industrial Application Of Bnr For Wastewater Treatmentmentioning

confidence: 99%

“…High-throughput sequencing techniques, metagenomics, and other microbiome strategies are being applied to analyze microbiota with the ability to remove nitrogen pollutants ( Xiang et al, 2021 ). There is a great diversity in the dominant microorganisms functioned in different nitrogen pollutant removal processes.…”

Section: The Application Of Microbiome and Synthetic Biology For Nitrogen Removalmentioning

confidence: 99%

Advances in Studies on Microbiota Involved in Nitrogen Removal Processes and Their Applications in Wastewater Treatment

et al. 2021

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The discharge of excess nitrogenous pollutants in rivers or other water bodies often leads to serious ecological problems and results in the collapse of aquatic ecosystems. Nitrogenous pollutants are often derived from the inefficient treatment of industrial wastewater. The biological treatment of industrial wastewater for the removal of nitrogen pollution is a green and efficient strategy. In the initial stage of the nitrogen removal process, the nitrogenous pollutants are converted to ammonia. Traditionally, nitrification and denitrification processes have been used for nitrogen removal in industrial wastewater; while currently, more efficient processes, such as simultaneous nitrification-denitrification, partial nitrification-anammox, and partial denitrification-anammox processes, are used. The microorganisms participating in nitrogen pollutant removal processes are diverse, but information about them is limited. In this review, we summarize the microbiota participating in nitrogen removal processes, their pathways, and associated functional genes. We have also discussed the design of efficient industrial wastewater treatment processes for the removal of nitrogenous pollutants and the application of microbiome engineering technology and synthetic biology strategies in the modulation of the nitrogen removal process. This review thus provides insights that would help in improving the efficiency of nitrogen pollutant removal from industrial wastewater.

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Differences of bacterial communities in two full-scale A2/O municipal wastewater treatment plants and their effects on effluent total nitrogen removal

Cited by 9 publications

References 40 publications

Bacterial Community Composition and Function in a Tropical Municipal Wastewater Treatment Plant

Bacterial Community Composition and Function in a Tropical Municipal Wastewater Treatment Plant

A review on application of external carbon sources for denitrification for wastewater treatment

Advances in Studies on Microbiota Involved in Nitrogen Removal Processes and Their Applications in Wastewater Treatment

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