Key factors governing the performance and microbial community of one-stage partial nitritation and anammox system with bio-carriers and airlift circulation

Hong, Chen; Hong, Wei; Yu, Guanlong; Xiong, Ying; Wu, Haipeng; Yang, Min; Chen, Rong; Yang, Enzhe; Jiang, Changbo; Li, Yu You

doi:10.1016/j.biortech.2021.124668

Cited by 74 publications

(14 citation statements)

References 38 publications

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“…The responses of microorganisms at the microbial community, enzyme, and gene levels always play an important role in pollutant removal. − For example, the changes in the microbial community in the treatment of disperse domestic sewage by using a sequential vertical-flow trickling filter and horizontal-flow multi-soil-layering reactor in the presence of SDBS were analyzed by Tang et al Furthermore, microbial metabolism is dominated by enzyme activity. In the process of alkane degradation, alkane hydroxylase can initiate the aerobic degradation of alkanes by inserting oxygen atoms at the different sites of the alkane terminus .…”

Section: Resultsmentioning

confidence: 99%

Enhanced Removal of Hydrophobic Short-Chain n-Alkanes from Gas Streams in Biotrickling Filters in Presence of Surfactant

Lin

Wang³

et al. 2022

Environ. Sci. Technol.

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Emissions of n-alkanes are facing increasingly stringent management challenges. Biotrickling filtration in the presence of surfactants is a competitive alternative for the enhanced removal of n-alkanes. Herein, sodium dodecyl benzene sulfonate (SDBS) was added into the liquid phase feeding a biotrickling filter (BTF) to enhance the removal of various short-chain n-alkanes from n-hexane (C6) to methane (C1). The removal performance of C6–C1 and microbial response mechanisms were explored. The results showed that the removal efficiency (RE) of n-alkanes decreased from 77 ± 1.3 to 35 ± 5.6% as the carbon chain number of n-alkanes decreased from C6 to C1, under the conditions of an n-alkane inlet load of 58 ± 3.0 g/m3·h and EBCT of 30 s. The removal performance of n-alkanes was enhanced significantly by the introduction of 15 mg/L SDBS, as the RE of C6 reached 99 ± 0.7% and the RE of C1 reached 74 ± 3.3%. The strengthening mechanisms were that the apparent Henry’s law coefficient of n-alkanes decreased by 11 ± 1.4–30 ± 0.3%, and the cell surface hydrophobicity of microorganisms improved from 71 ± 5.6 to 87 ± 4.0% with the existence of SDBS. Moreover, the presence of SDBS promoted the succession and activity of the microbial community. The activities of alkane hydroxylase and alcohol dehydrogenase were 5.8 and 5.9 times higher than those without SDBS, and the concentration of the cytochrome P450 gene was improved 2.2 times. Therefore, the addition of SDBS is an effective strategy that makes BTF suitable for the removal of various n-alkanes from waste gas streams.

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Section: Resultsmentioning

confidence: 99%

Enhanced Removal of Hydrophobic Short-Chain n-Alkanes from Gas Streams in Biotrickling Filters in Presence of Surfactant

Lin

Wang³

et al. 2022

Environ. Sci. Technol.

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“…For example, influent C/N ratio played an important role on the microbial population, sludge morphology and microbial metabolism in PN/A system (Miao et al, 2018). For a fixed C/N ratio of wastewater, DO control and aeration rate were also the key factors for performance stability under oxygen‐limiting conditions (Chen et al, 2021). Thauera was a kind of denitrifying bacteria (Garrity et al, 2005) with the relative abundance of16.6% in the initial operation.…”

Section: Resultsmentioning

confidence: 99%

Performance of single‐stage partial nitritation and anammox reactor treating low‐phenol/ammonia ratio wastewater and analysis of microbial community structure

Ren

et al. 2021

Water Environment Research

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Phenol and ammonia are common pollutants in many industrial wastewaters. The partial nitritation and anammox process is a very promising technology for treating phenol–ammonia wastewater. This study was the first time to rapidly achieve the start‐up and operation of the single‐stage partial nitritation /anammox reactor treating phenol–ammonia wastewater. The optimized ratio of phenol and nitrogen (phenol/NH4+‐N=0.3) was set to start‐up the reactor. After 60 days of operation, the total nitrogen and COD removal efficiencies were around 73.0% and 79.5%, respectively. The activity of ammonium‐oxidizing bacteria was291.1 ± 3.0 mg NH4+‐N g−1MLVSS d−1 and the specific anammox activity was 20.9 ± 1.0 mg NH4+‐N g−1MLVSS d−1. The results indicated that the anammox bacteria had adapted to phenol condition and remained stable activity after the 60 days’ operation in the reactor. The sequence analysis of 16SrRNA showed that the microbial community structure evolved to a balanced distribution that the removals of phenol and ammonia could be achieved simultaneously. Practitioner Points Phenol/N ratio of 0.3 was set to start up the single‐stage partial nitritation/anammox reactor. The single‐stage partial nitritation /anammox reactor was rapidly started up when treating the phenol‐ammonia wastewater. Total nitrogen removal rate and COD removal efficiencies could achieve to 73.0% and 79.5%, respectively. Microbial community structure evolved to stable distribution of which AOB, anammox bacteria, denitrification bacteria and heterotrophic nitrification bacteria coexisted.

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“…Actually, many types of wastewater, such as soy protein, fertilizer, and coal gasification, contain medium concentration of NH 4 + ‐N (100–300 mg/L) after anaerobic treatment (Li et al, 2011; Maine et al, 2019; Wu et al, 2015). Compared with high concentration of NH 4 + ‐N wastewater, anammox process for treating medium concentration of NH 4 + ‐N wastewater is very sensitive to dissolved oxygen (DO) and difficult to inhibit nitrite‐oxidizing bacteria (NOB) through free ammonia (FA) and free nitrous acid (FNA) (Chen et al, 2021). But it is a pity that this information in lab or pilot studies at present is still scarce.…”

Section: Introductionmentioning

confidence: 99%

“…But it is a pity that this information in lab or pilot studies at present is still scarce. Although there are some challenges or bottlenecks, such as the influent NH 4 + -N concentration, low cell yield of anammox bacteria (AnAOB: doubling time 11 days), which would affect the rapid start-up of the process, its application to the medium concentration of NH 4 + -N wastewater is attractive due to the excellent economy and suitability for low C/N wastewater (Chen et al, 2018(Chen et al, , 2021Su et al, 2021). Till now, many strategies have been used to promote the start-up of CANON process, including temperature, aeration mode, nitrogen load, and alkalinity variation (Gonzalez-Martinez et al, 2016;Lu et al, 2020;Miao et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Effects of alkalinity addition with different strategies on CANON process: Start‐up, performance, and microbial community

Liu

Zhou

Liang

et al. 2022

Water Environment Research

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The effects of alkalinity addition with different strategies on the start-up, performance, and microbial community of completely autotrophic nitrogen removal over nitrite (CANON) were investigated over 450 days. In phase I, the alkalinity was increased gradually from 300 to 2,000 mg/L to obtain the optimal range. In phase II, the reactor was restarted to verify the appropriate alkalinity value of 1,600 mg/L. The fact that it only took 90 days (phase I: 170 days) to complete the start-up of CANON in phase II demonstrated that an alkalinity value of 1,600 mg/L was suitable when the influent NH 4 + -N concentration was 200 mg/L (alkalinity/NH 4 + -N = 8:1). The slope (k = 2.00) of NH 4 + -N concentration decrease in phase II during the start-up process was significantly higher than that in phase I (k = 1.50). High removal efficiencies of NH 4 + -N (98%) and TN (80%) were attained in both phases. Specific anaerobic ammonium oxidation (anammox) activity tests showed that the anammox activity of the two phases reached 3.31 and 5.31 mg TN/(g VSSÁh), respectively.High-throughput sequencing analysis revealed that appropriate alkalinity could promote the enrichment of Candidatus Brocadia, C. Jettenia, and C. Kuenenia (total abundance of 31.96%) while effectively inhibiting Nitrospira (abundance of less than 0.50%). Practitioner Points• An alkalinity/NH 4 + -N ratio of 8 promoted the rapid start-up and stable performance of CANON. • NH 4+ -N and TN removal efficiencies of 98% and 80%, respectively, were obtained. • High alkalinity promoted the enrichment of Candidatus Brocadia, Candidatus Jettenia, Candidatus Kuenenia and inhibited Nitrospira.

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Key factors governing the performance and microbial community of one-stage partial nitritation and anammox system with bio-carriers and airlift circulation

Cited by 74 publications

References 38 publications

Enhanced Removal of Hydrophobic Short-Chain n-Alkanes from Gas Streams in Biotrickling Filters in Presence of Surfactant

Enhanced Removal of Hydrophobic Short-Chain n-Alkanes from Gas Streams in Biotrickling Filters in Presence of Surfactant

Performance of single‐stage partial nitritation and anammox reactor treating low‐phenol/ammonia ratio wastewater and analysis of microbial community structure

Effects of alkalinity addition with different strategies on CANON process: Start‐up, performance, and microbial community

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