Nitrous oxide emissions and dissolved oxygen profiling in a full-scale nitrifying activated sludge treatment plant

Aboobakar, Amina; Cartmell, Elise; Stephenson, Tom; Jones, Michael N.; Vale, Peter; Dotro, Gabriela

doi:10.1016/j.watres.2012.10.004

Cited by 141 publications

(78 citation statements)

References 24 publications

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“…(Figures 3a and 3b) were an order of magnitude higher than that in 2010 (Figure 2a), independently of the influent organic load. This is due to the fact that in 2011, the influent air flow rate in the aeration tank was 2 times higher than that used in 2010 (Table 2), which strongly support the hypotesis that the aeration rate influences the N 2 O emission rate, due to enhancement of both the nitrification rate and the removal of supersaturated N 2 O in the liquid by air stripping, as has already been mentioned by other authors (Czepiel et al, 1995;Ahn et al, 2010;Brotto et al, 2010;Aboobakar et al, 2013;de Mello et al, 2013). ) proposed by the IPCC guidelines (2006).…”

Section: Resultssupporting

confidence: 76%

“…They also reported lower emissions of N 2 O in the summer months and attributed these to the lower concentrations of NH 4 + in the influent wastewater at that time of the year. The temporal variability of N 2 O emissions in activated sludge wastewater treatment systems has been frequently reported in the literature as directly related to the concentration of NH 4 + in the influent wastewater (Ahn et al, 2010;Lotito et al, 2012;Aboobakar et al, 2013;Hu et al, 2013). Ribeiro et al (2013) in a previous study at the same WWTP.…”

Section: Resultsmentioning

confidence: 88%

“…The main controlling factors of N 2 O emissions in the activated sludge WWTPs are the concentration of influent TN, the sludge age, the DO concentration and aeration rate (Brotto et al, 2010;Brotto, 2011;Lotito et al, 2012;Aboobakar et al, 2013;de Mello et al, 2013;Hu et al, 2013;Ribeiro et al, 2013). Foley et al (2010) and highlighted the importance of precise control in operational parameters regarding to the N 2 O production and emission in aeration tanks from activated sludge WWTPs, which is strongly linked with the removal efficiency of TN.…”

Section: Influent Bod Cod and Nh 4 + Concentrationsmentioning

confidence: 99%

See 2 more Smart Citations

Controlling Factors of Nitrous Oxide Emissions From a Conventional Activated Sludge Wastewater Treatment Plant

Ribeiro¹,

Oliveira

Kligerman

et al. 2015

Engevista

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Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 88%

Section: Influent Bod Cod and Nh 4 + Concentrationsmentioning

confidence: 99%

See 1 more Smart Citation

Controlling Factors of Nitrous Oxide Emissions From a Conventional Activated Sludge Wastewater Treatment Plant

Ribeiro¹,

Oliveira

Kligerman

et al. 2015

Engevista

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“…It was also indicated that small and medium enterprises paid insufficient attention on operating WWTPs as well as training responsible staffs. According to Aboobakar et al [144], most of the existing ASPs have been designed at mid-ranged conditions such as 10-day SRT and 8 h HRT, which may not support a complete NPEO and NP removal.…”

Section: The Role Of the Secondary Activated Sludge Processmentioning

confidence: 99%

Distribution and Removal of Nonylphenol Ethoxylates and Nonylphenol from Textile Wastewater—A Comparison of a Cotton and a Synthetic Fiber Factory in Vietnam

Watanabe

2017

Water

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Abstract:The textile industry is a significant source of nonyphenol and their ethoxylates, which are suggested to be responsible for endocrine disruption in wildlife and humans. This study is a comparison of two conventional wastewater treatment processes in a cotton and a synthetic fiber factory in Vietnam, with regard to the distribution and removal of nonyphenol ethoxylates and nonyphenol throughout each process. Diverse trends in the distribution of nonyphenol ethoxylates in wastewater from factories, distinguished by their raw materials, could be revealed. Primary coagulation might not perfectly facilitate nitrification in the secondary activated sludge process regarding pH. Nevertheless, satisfactory removals were achieved during coagulation and activated sludge processes in both systems. The roles of long hydraulic retention times (21 and 16 h, respectively), low organic loadings (0.1 and 0.2 gCOD/gMLVSS.day, respectively), extended solids retention times (61 and 66 days, respectively), and mixed liquor suspended solids of greater than 2000 mg/L have been demonstrated. The findings provide evidence and a better understanding of nonyphenol ethoxylate and nonyphenol removal efficacy as well as influencing factors in Vietnamese textile wastewater treatment. The results are beneficial for the textile industry in Vietnam regarding investment decisions for wastewater treatment.

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“…O 2 concentrations below 1 mg/L can cause N 2 O emissions that correspond to 10% of the initial N-load [6]. Other studies confirm that low O 2 concentrations lead to increased N 2 O emissions [7][8][9][10][11]. On the other hand, O 2 concentrations of 3 mgO 2 /L also lead to increased N 2 O emissions due to incomplete denitrification, caused by recirculation of the O 2 from the aerobic to the anoxic reactor [12].…”

Section: Introductionmentioning

confidence: 99%

Implementation of Extended Statistical Entropy Analysis to the Effluent Quality Index of the Benchmarking Simulation Model No. 2

Sobańtka

Pons

Zessner

et al. 2014

Water

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Abstract:Extended statistical entropy analysis (eSEA) is used to assess the nitrogen (N) removal performance of the wastewater treatment (WWT) simulation software, the Benchmarking Simulation Model No. 2 (BSM No. 2 ). Six simulations with three different types of wastewater are carried out, which vary in the dissolved oxygen concentration (O 2,diss. ) during the aerobic treatment. N 2 O emissions generated during denitrification are included in the model. The N-removal performance is expressed as reduction in statistical entropy, ΔH, compared to the hypothetical reference situation of direct discharge of the wastewater into the river. The parameters chemical and biological oxygen demand (COD, BOD) and suspended solids (SS) are analogously expressed in terms of reduction of COD, BOD, and SS, compared to a direct discharge of the wastewater to the river (ΔEQ rest ). The cleaning performance is expressed as ΔEQ new , the weighted average of ΔH and ΔEQ rest . The results show that ΔEQ new is a more comprehensive indicator of the cleaning performance because, in contrast to the traditional effluent quality index (EQ), it considers the characteristics of the wastewater, includes all N-compounds and their distribution in the

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Nitrous oxide emissions and dissolved oxygen profiling in a full-scale nitrifying activated sludge treatment plant

Cited by 141 publications

References 24 publications

Controlling Factors of Nitrous Oxide Emissions From a Conventional Activated Sludge Wastewater Treatment Plant

Controlling Factors of Nitrous Oxide Emissions From a Conventional Activated Sludge Wastewater Treatment Plant

Distribution and Removal of Nonylphenol Ethoxylates and Nonylphenol from Textile Wastewater—A Comparison of a Cotton and a Synthetic Fiber Factory in Vietnam

Implementation of Extended Statistical Entropy Analysis to the Effluent Quality Index of the Benchmarking Simulation Model No. 2

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