The importance of the substrate ratio in the operation of the Anammox process in upflow biofilter

Jin, Ren‐Cun; Xing, Bao-Shan; Yu, Jinjin; Qin, Tianyue; Chen, Shen-Xing

doi:10.1016/j.ecoleng.2012.12.027

Cited by 64 publications

(13 citation statements)

References 35 publications

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“…The packing material provides surface area for biofilm attachment to perform the nitrogen removal process and promotes biomass retention of the slowly growing bacteria [102]. The UBF system has been successfully applied for the anammox process using conventional wastewater treatment plant sludge as the inoculum; the system was operated at pH 7.0-8.0 and 30-36˚C [85,103]. The anammox process in the UBF system showed a high NH 4 + -N removal efficiency of 89% at the optimum HRT (>4.6 h); however, further decreases in the HRT showed a drop in the removal efficiency [102].…”

Section: Upflow Biofilter (Ubf)mentioning

confidence: 99%

“…The suspended-type bioreactors includes the sequencing batch reactor (SBR) [10], [78][79][80][81], UASB [49,52,58,76], membrane bioreactor (MBR) [13], anaerobic membrane bioreactor (AnMBR) [5] and the gas-lift reactor [82,83]. The attached growth-type bioreactors, including the FBR [35], rotating biological contactor (RBC) [84] and upflow biofilter (UBF) [85], use supporting material to retain the anammox microbial population. Typical examples of bioreactor configurations used during anammox enrichment are discussed below, and the operating conditions applied for anammox enrichment in bioreactor systems in previous studies are summarized in Table 7.…”

Section: Anammox Enrichment In Bioreactor Systemsmentioning

confidence: 99%

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Enrichment of anaerobic ammonium oxidation (anammox) bacteria for short start-up of the anammox process: a review

Ibrahim

Yusof

Yusoff

et al. 2016

Desalination and Water Treatment

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A B S T R A C TThe application of the anaerobic ammonium oxidation (anammox) reaction in a biological nitrogen removal system to treat wastewater has become of great interest since its discovery. The anammox reaction is performed by anammox bacteria that belong to the Planctomycete phylum. The reaction occurs in the presence of ammonium using nitrite as the substrate under anaerobic conditions. However, the bacteria have an extremely slow growth rate and stringent metabolic conditions that cause difficulty in culturing and applying the system for wastewater treatment. Anammox enrichment has a long start-up period for the anammox process that hinders researchers using laboratory and full-scale systems for the first time. Many attempts have been made to culture anammox to establish a successful anammox culture with a shorter start-up period for the anammox reaction and high nitrogen removal activity. This paper reviews previous studies on anammox enrichment with emphasis on (i) inoculum selection, (ii) enrichment techniques and (iii) factors influencing anammox enrichment. This review will assist researchers in planning and designing an appropriate anammox enrichment. The findings should widen the application of anammox in biological nitrogen removal systems for nitrogenous wastewater.

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Section: Upflow Biofilter (Ubf)mentioning

confidence: 99%

Section: Anammox Enrichment In Bioreactor Systemsmentioning

confidence: 99%

Enrichment of anaerobic ammonium oxidation (anammox) bacteria for short start-up of the anammox process: a review

Ibrahim

Yusof

Yusoff

et al. 2016

Desalination and Water Treatment

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“…With the increase in the CEA in stage II (phases I, II, and III), the contribution rate of anammox also slightly fluctuated, decreasing from 88.5% to 85.7% (Figure 4). Due to the insufficient amount of ammonium in the reactor, the activity of anammox bacteria was restricted [33] and nitrite was transformed into nitrogen through the denitrification process. Consequently, thiosulfate and organic matter were utilized for nitrite reduction, inducing the accumulation of nitrate in the reactor (Figure 3b).…”

Section: Cooperation and Competition Between Anammox And Denitrificationmentioning

confidence: 99%

“…Additionally, S/N ratio regulation promoted the occurrence of complete denitrification in phase IV and the corresponding contribution rate of denitrification to TN removal increased to 74.7%. The serious insufficiency of ammonium in the reactor clearly limited anammox [33] to and facilitated nitrite reduction through denitrification. Additionally, previous studies have demonstrated that high nitrite accumulation inhibits anammox [27,34], which was also demonstrated by the observed nitrite accumulation in the effluent (Figure 3b).…”

Section: Cooperation and Competition Between Anammox And Denitrificationmentioning

confidence: 99%

Feasibility of Adjusting the S2O32−/NO3− Ratio to Adapt to Dynamic Influents in Coupled Anammox and Denitrification Systems

Hou

Cheng

Wang

et al. 2020

IJERPH

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In this study, anammox, sulfur-based autotrophic denitrification, and heterotrophic denitrification (A/SAD/HD) were coupled in an expanded granular sludge bed (EGSB) reactor to explore the feasibility of enhancing denitrification performance by adjusting the S2O32−/NO3− (S/N) ratio to accommodate dynamic influents. The results indicated that the optimal influent conditions occurred when the conversion efficiency of ammonium (CEA) was 55%, the S/N ratio was 1.24, and the chemical oxygen demand (COD) was 50 mg/L, which resulted in a total nitrogen removal efficiency (NRE) of 95.0% ± 0.5%. The S/N ratio regulation strategy was feasible when the influent COD concentration was less than 100 mg/L and the CEA was between 57% and 63%. Characterization by 16S rRNA sequencing showed that Candidatus Jettenia might have contributed the most to anammox, while Thiobacillus and Denitratisoma were the dominant taxa related to denitrification. The findings of this study provide insights into the effects of CEA and COD on the performance of the A/SAD/HD system and the feasibility of the S/N ratio regulation strategy.

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“…(1)). Many studies have been conducted to investigate the anammox process in various configurations, and these studies have revealed distinct reactor performances (Strous et al, 1998;Jin et al, 2013a;Abbas et al, 2015;Yang et al, 2015). Recent years, anammox process has been applied in full-scale treatment of ammonium-rich wastewater such as sludge digested liquor (van der Star et al, 2007;Joss et al, 2009;van Hulle et al, 2010) and landfill leachate .…”

Section: Introductionmentioning

confidence: 98%

Response of performance of an anammox anaerobic baffled reactor (ABR) to changes in feeding regime

Chen

Guo

et al. 2015

Ecological Engineering

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The importance of the substrate ratio in the operation of the Anammox process in upflow biofilter

Cited by 64 publications

References 35 publications

Enrichment of anaerobic ammonium oxidation (anammox) bacteria for short start-up of the anammox process: a review

Enrichment of anaerobic ammonium oxidation (anammox) bacteria for short start-up of the anammox process: a review

Feasibility of Adjusting the S2O32−/NO3− Ratio to Adapt to Dynamic Influents in Coupled Anammox and Denitrification Systems

Response of performance of an anammox anaerobic baffled reactor (ABR) to changes in feeding regime

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