Long-term continuous partial nitritation-anammox reactor aeration optimization at different nitrogen loading rates for the treatment of ammonium rich digestate lagoon supernatant

Yang, Sen; Xu, Shengnan; Boiocchi, Riccardo; Mohammed, Abdul; Li, Xinru; Ashbolt, Nicholas J.; Liu, Yang

doi:10.1016/j.procbio.2020.08.030

Cited by 8 publications

(5 citation statements)

References 46 publications

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“…In this way, it was possible to consider the efficiency and economy of nitrogen removal in the deammonification process. Since high DO concentrations can inhibit the AnAOB activity or stimulate the NOB growth, many deammonification studies have been performed at low DO concentrations [12,34,40,41,46]. Similar to our study, Yang et al [47] found that the deammonification efficiency increased when the DO set point increased from 0.25 to 0.76 mg O 2 /L and worsened at a DO greater than 1.15 mg O 2 /L in a one-stage pilot deammonification SBR.…”

Section: Effect Of Do Concentrations and Aeration Strategies On The D...supporting

confidence: 87%

“…Since high DO concentrations can inhibit the AnAOB act In other studies, it is worth noting that DO as low as 0.19 mg O 2 /L allowed to obtain satisfactory results in terms of the effectiveness of NH 4 -N removal (92.2%) [39]. Yang et al [34] achieved the NH 4 -N removal efficiency at the level of 81.5% when DO = 0.18-0.2 mg O 2 /L. At DO in the range of 0.24-0.28 mg O 2 /L, the removal efficiency was 88.2%.…”

Section: Effect Of Do Concentrations and Aeration Strategies On The D...mentioning

confidence: 96%

“…The same off/on ratio was maintained by Sobotka et al [49] with an intermittent aeration mode off/on (18/9 min). However, there are studies where the aeration time was seven times longer than that without aeration (105 min/15 min), where the NH 4 -N removal efficiency was high (81.5-92.2%) [34,40]. The results showed that the appropriate frequency of the intermittent aeration cycle can improve AOB and AnAOB competition by effectively activating NOB suppression.…”

Section: Effect Of Do Concentrations and Aeration Strategies On The D...mentioning

confidence: 98%

“…On the other hand, a high DO concentration (1-1.5 mg O 2 /L) inhibited the activity of AnAOB. It was shown that 0.28 mg O 2 /L was the threshold DO for inhibition of AnAOB [34]. Other authors reported that the AnAOB activity decreased significantly at DO > 0.46 mg O 2 /L, and at DO > 1 mg O 2 /L, the activity was significantly inhibited [35].…”

Section: Effect Of the Do Concentration On The Anammox Process (Secon...mentioning

confidence: 99%

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Comparison of the Efficiency of Deammonification under Different DO Concentrations in a Laboratory-Scale Sequencing Batch Reactor

Al‐Hazmi

Yin

Grubba

et al. 2022

Water

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The efficiency of deammonification depends on the cooperation of ammonium oxidizing bacteria and archaea (AOB/AOA), anaerobic ammonium oxidizing bacteria (AnAOB) and the effective suppression of nitrite oxidizing bacteria (NOB) that compete with AnAOB for nitrite (NO2-N). One of the effective NOB suppression strategies is intermittent aeration. However, it is important to have a good understanding of the optimum dissolved oxygen (DO) value in the aeration period and optimize the non-aeration time used during the reaction phase. This study comprised the investigation of the effect of different DO set points (0.4, 0.7, 1.0 and 1.5 mg O2/L) under the same aeration length off/on (12/3 min). Moreover, three different intermittent aeration modes (9/3, 6/3, 3/3) under the same DO set point (0.7 mg O2/L) were more investigated. The experiment was conducted for 6 months (180 days) in a laboratory-scale sequencing batch reactor (SBR) with a working volume of 10 L. The results indicated that a high N removal efficiency was achieved 74% at the DO set point = 0.7 mg O2/L during aeration strategy off/on (6/3 min) due to the low nitrate production rate (NPR) 0.9 mg N/g VSS/h and high ammonium utilization rate (AUR) 13 mg N/g VSS/h (NPR/AUR = 0.06). Mathematical modeling results confirmed that the feasible DO set point 0.7 and intermittent aeration mode off/on (6/3 min) were especially suitable for the optimal balance between the NOB suppression and keeping high activities of AOB and anammox in the system.

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Section: Effect Of Do Concentrations and Aeration Strategies On The D...supporting

confidence: 87%

Section: Effect Of Do Concentrations and Aeration Strategies On The D...mentioning

confidence: 96%

Section: Effect Of Do Concentrations and Aeration Strategies On The D...mentioning

confidence: 98%

Section: Effect Of the Do Concentration On The Anammox Process (Secon...mentioning

confidence: 99%

See 2 more Smart Citations

Comparison of the Efficiency of Deammonification under Different DO Concentrations in a Laboratory-Scale Sequencing Batch Reactor

Al‐Hazmi

Yin

Grubba

et al. 2022

Water

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“…10 Compared to conventional biological treatment methods, the PN/A process can save approximately 60% of aeration, reduce alkalinity dosing by 50%, and does not require a carbon source. 11 Therefore, scientists have considered the application of the PN/A process for the removal of nitrogen from toilet water. 10 Vlaeminck et al (2009) used the PN/A process to treat digestive toilet water with 76% nitrogen removal efficiency.…”

Section: Introductionmentioning

confidence: 99%

Process research of one‐stage partial nitrification‐anammox (S‐PN/A) technology in toilet water treatment and related kinetic simulation

Liu

Shi

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: Toilet water is a typical wastewater that is abundant and has a low organic carbon-to-nitrogen ratio; therefore, it is necessary to explore an economical and efficient treatment option. Partial nitrification-anammox (PN/A) technology is characterized by low aeration energy consumption and a high nitrogen removal rate. As a process technology that has emerged in recent years, PN/A technology involves operating conditions that require further study.RESULTS: In this work, two one-stage partial nitrification-anammox (S-PN/A) reactors were operated to achieve nitrogen removal from toilet water. The total nitrogen removal rate of the two reactors reached 85%. The hydraulic nitrogen load of the first reactor was only 0.03 kg N m -3 •d -1 , while the hydraulic nitrogen load of the second reactor reached 0.09 kg N m -3 •d -1 . Nitrosomonas and Candidatus Kuenenia in the reactor were the main functional bacteria for partial nitrification and anammox. Kinetic simulations were performed using AQUASIM 2.0 software. The results showed that, in the partial nitrification system, the higher the (sludge retention time) SRT , the lower the effluent ammonia nitrogen concentration; the optimal operating condition's sludge retention time (SRT) was 10 days and dissolved oxygen (DO) was 0.2 mg L -1 . The higher the SRT in the anammox system, the lower the concentration of ammonia and nitrite nitrogen in the effluent; in addition, the SRT should be greater than 60 days to ensure that as much nitrogen was removed as possible.CONCLUSION: In summary, the research results confirm that it is feasible to use PN/A technology to remove nitrogen from toilet water.

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A Novel Strategy to Reduce the Higher Nitrogen Loading Shock on Anammox Growth Rate and Granule Sludge Stability

Zhang,

Sha,

et al. 2024

Water Air Soil Pollut

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Long-term continuous partial nitritation-anammox reactor aeration optimization at different nitrogen loading rates for the treatment of ammonium rich digestate lagoon supernatant

Cited by 8 publications

References 46 publications

Comparison of the Efficiency of Deammonification under Different DO Concentrations in a Laboratory-Scale Sequencing Batch Reactor

Comparison of the Efficiency of Deammonification under Different DO Concentrations in a Laboratory-Scale Sequencing Batch Reactor

Process research of one‐stage partial nitrification‐anammox (S‐PN/A) technology in toilet water treatment and related kinetic simulation

A Novel Strategy to Reduce the Higher Nitrogen Loading Shock on Anammox Growth Rate and Granule Sludge Stability

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