A pilot-scale study on the partial nitritation-anammox process for treatment of anaerobic sludge digester effluent

Çelen-Erdem, İpek; Sağır-Kurt, Ece

doi:10.5004/dwt.2019.23787

Cited by 5 publications

(5 citation statements)

References 30 publications

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“…Both synthetic and real wastewater (digester effluent) feeding solutions contain NH 4 + ─N and NO 2 ─N concentrations at the ratio of 1:1.32. During the entire experiment, the reactors operated without pH control and the influent pH was kept at 7.5–8.0 which is consistent with other studies . UPBAn1 reactor which was fed with synthetic solution did not show stability until day 64 (Figure 2a).…”

Section: Resultssupporting

confidence: 88%

“…During the entire experiment, the reactors operated without pH control and the influent pH was kept at 7.5-8.0 which is consistent with other studies. [12,19] which was fed with synthetic solution did not show stability until day 64 (Figure 2a). It reached steady state after day 76 with effluent concentration remaining close to zero and maximal NLR and NRR for an NRE at 92%.…”

Section: Reactor Performance In Nitrogen Removalmentioning

confidence: 99%

“…However, recent studies have reported rapid and successful enrichment and operational strategies and factors influencing the anammox enrichment process. Examples include using different seeding sludge as inoculum, reactor type, medium carrier, and optimal operational conditions, determining the effect of various parameters, as hydraulic retention time, feeding load, DO, temperature . İbrahim et al., Çelen‐Erdem at al., Egli et al., and Uyanik et al .…”

Section: Introductionmentioning

confidence: 99%

“…Examples include using different seeding sludge as inoculum, [4,9] reactor type, medium carrier, and optimal operational conditions, [10] determining the effect of various parameters, as hydraulic retention time, feeding load, DO, temperature. [6,[11][12][13]İ brahim et al, [6] Çelen-Erdem at al., [11] Egli et al, [14] and Uyanik et al [15] used synthetic wastewater, which contains trace elements, chemicals and tap water, as feeding solution during the lab-scale anammox enrichment studies. To the best of author knowledge, an economical and easily handled feeding solution to produce large volumes of anammox bacteria especially in view of the process scale-up has not been reported previously.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Sludge Digester Effluent as Feeding Solution for the Enrichment of Anammox Bacteria

Çelen-Erdem

2020

CLEAN Soil Air Water

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The aim of this study is to evaluate the feasibility of sludge digester effluent as feeding solution to enrich anaerobic ammonium oxidation (anammox) bacteria. The performance of the two parallel pilot scale‐upflow packed bed anammox reactors (UPBAn1 and UPBAn2) are examined in terms of the enrichment of anammox bacteria. The control experiment is set up conducting synthetic wastewater as feeding solution in the UPBAn1 reactor whereas, the sludge digester effluent is fed to the nitritation reactor and then the partially nitrated digester effluent to the UPBAn2 reactor. Anammox activities are evaluated by mass balances based on ammonium (NH4+), nitrite (NO2−), and nitrate (NO3−) analysis and NRR. Microbial community of anammox bacteria is analyzed using real‐time polymerase chain reaction (PCR). The results demonstrate that UPBAn 1 and UPBAn2 reactors are successfully enriched on days 64 and 40 with NRRs of 19.54 and 19.43 g N m−3 per day, respectively. This study reveals that both synthetic wastewater and digester effluent are suitable for the enrichment of anammox bacteria; however, digester effluent as feeding solution for enrichment of anammox bacteria based on the ease of process control and process stability is more advisable.

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Section: Resultssupporting

confidence: 88%

Section: Reactor Performance In Nitrogen Removalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of Sludge Digester Effluent as Feeding Solution for the Enrichment of Anammox Bacteria

Çelen-Erdem

2020

CLEAN Soil Air Water

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“…Biological nitrogen removal can be accomplished via different biochemical routes, including the conventional nitrification‐denitrification process, the nitritation‐denitritation process, and partial nitritation‐anammox 1–4 …”

Section: Introductionmentioning

confidence: 99%

Thiosulphate driven autotrophic denitrification via nitrite using synthetic wastewater

Statiris

Hadjimitsis

Noutsopoulos

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND The removal of biological nitrite from wastewater can occur by both heterotrophic and autotrophic bacteria. Autotrophic denitritation can be implemented by using different sulphur forms (e.g., S2−, S0 or S₂O₃2−) as electron donors, and there is no need for organic carbon availability, as is required in heterotrophic denitrification. This work investigated an alternative biochemical pathway for nitrite removal from synthetic wastewater with high nitrite content, using thiosulphate as electron donor. The process was examined for 170 days in three identical 1 L sequencing batch reactors (SBR) that were inoculated with filtrate originating from the aerobic filters of the desulphurization unit of a wastewater treatment plant (WWTP). RESULTS The SBR units were able to remove approximately 98% of the initial nitrite concentration of 70–80 mg N L−1, operating under an HRT of 5d. The batch experiments showed autotrophic denitritation rates (NUR) with average values between 0.91 and 1.50 mg NO₂‐N gVSS−1 h−1 during the whole duration of the experiment, with a remarkable increase on the NUR after the initial lag time of the process, where rates of up to 4.74 mg NO₂‐N gVSS−1 h−1 were measured. CONCLUSION The daily monitoring of the three SBR units showed that denitritation via thiosulphate can be effective enough for nitrite removal without carbon source addition. The lag phase of the process, as well as the loss of alkalinity and pH drop during denitritation, are disadvantages that can be counterbalanced with the cost savings resulting from not needing a carbon source addition when treating wastewater with low C/N ratio. © 2021 Society of Chemical Industry

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Efficient overcoming strategies for the challenges faced in sidestream deammonification: Large-stage field experience

Choi

Cho

Jung

2022

Biochemical Engineering Journal

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A pilot-scale study on the partial nitritation-anammox process for treatment of anaerobic sludge digester effluent

Cited by 5 publications

References 30 publications

Evaluation of Sludge Digester Effluent as Feeding Solution for the Enrichment of Anammox Bacteria

Evaluation of Sludge Digester Effluent as Feeding Solution for the Enrichment of Anammox Bacteria

Thiosulphate driven autotrophic denitrification via nitrite using synthetic wastewater

Efficient overcoming strategies for the challenges faced in sidestream deammonification: Large-stage field experience

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