Development and characterization of the partial nitrification aerobic granules in a sequencing batch airlift reactor

Song, Yanjun; Ishii, Satoshi; Rathnayake, Lashitha; Ito, Tsukasa; Satoh, Hisashi; Okabe, Satoshi

doi:10.1016/j.biortech.2013.04.018

Cited by 41 publications

(44 citation statements)

References 32 publications

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“…Furthermore, the NOB can reestablish in a sufficiently long biomass retention time even under harsh conditions (Villaverde et al, 2000). In aerobic granulation system, the presence of organic substrate leads to the growth of denitrifying heterotrophs which consume nitrite and hence the NOB cannot reestablish due to insufficient nitrite substrate even with a long biomass retention time (Song et al, 2013). Nevertheless, in this study, a high concentration nitrite substrate accumulated in the SBR reactor with absence of organic substrate.…”

Section: Discussionmentioning

confidence: 93%

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Experimentation and mathematical models for partial nitrification in aerobic granular sludge process

Cui

Park

et al. 2016

KSCE J Civ Eng

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In this study, the characteristics partial nitrifying biomass in the Sequencing Batch Reactor (SBR) for aerobic granulation was investigated based on experiments and simulation modeling. The reactor operation was carried out at high concentration of ammonium (200~850 mg N/L) which favored Ammonia-Oxidizing Bacteria (AOB) growth over Nitrite-Oxidizing Bacteria (NOB) growth. In partial nitrifying granulation, both Free Ammonia (FA) and Free Nitrous Acid (FNA) simultaneously influenced the activity of NOB much more than that of AOB. According to the simulation results, thE Dissolved Oxygen (DO) concentration and oxygen affinity affect the growth competition and can influence the species that are predominant in the reactor. Both AOB and NOB can have growth potential under toxicants (FA and FNA) inhibition and limited oxygen condition. The AOB growth forms inner part of granule's biofilm, but the NOB growth does not engage in the formation of granules.

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Section: Discussionmentioning

confidence: 93%

“…The aerobic granular sludge process have been used to develop partial nitrifying biomass (Wan et al, 2013;11 Tsuneda et al, 2003). Furthermore, the application of aerobic granular sludge can carry out simultaneous nitrification and denitrification in one step reactor (Song et al, 2013;Wang et al, 2012;Cui et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Experimentation and mathematical models for partial nitrification in aerobic granular sludge process

Cui

Park

et al. 2016

KSCE J Civ Eng

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“…We previously established a stable PN process using aerobic granules in an internal‐circulating sequence batch airlift reactor (SBAR) (Song et al ., ). In this reactor, the NH 4 + conversion rate was 1.22 kg N m −3 day −1 , whereas the nitrite production rate was 0.64 kg N m −3 day −1 .…”

Section: Introductionmentioning

confidence: 97%

Identification of key nitrous oxide production pathways in aerobic partial nitrifying granules

Ishii

Song

Rathnayake

et al. 2014

Environmental Microbiology

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The identification of the key nitrous oxide (N2O) production pathways is important to establish a strategy to mitigate N2O emission. In this study, we combined real-time gas-monitoring analysis, (15)N stable isotope analysis, denitrification functional gene transcriptome analysis and microscale N2O concentration measurements to identify the main N2O producers in a partial nitrification (PN) aerobic granule reactor, which was fed with ammonium and acetate. Our results suggest that heterotrophic denitrification was the main contributor to N2O production in our PN aerobic granule reactor. The heterotrophic denitrifiers were probably related to Rhodocyclales bacteria, although different types of bacteria were active in the initial and latter stages of the PN reaction cycles, most likely in response to the presence of acetate. Hydroxylamine oxidation and nitrifier denitrification occurred, but their contribution to N2O emission was relatively small (20-30%) compared with heterotrophic denitrification. Our approach can be useful to quantitatively examine the relative contributions of the three pathways (hydroxylamine oxidation, nitrifier denitrification and heterotrophic denitrification) to N2O emission in mixed microbial populations.

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“…However, the operating conditions of a high level of nitrite accumulation and a low level of dissolved oxygen (DO) have been found to trigger N 2 O production (5). N 2 O emission rates and quantities for different reactor types and operating conditions have been reported previously (6,7), and the N 2 O emission in the partial-nitritation process has received much attention. Desloover et al (8) investigated the N 2 O emission from combined partial-nitritation and anammox reactors and found that 97.5% of emitted N 2 O could be ascribed to the partial-nitritation reactor.…”

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confidence: 98%

Nitrous oxide emission in autotrophic partial nitritation system: Macro- and microanalyses

Wang

et al. 2015

Journal of Bioscience and Bioengineering

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Development and characterization of the partial nitrification aerobic granules in a sequencing batch airlift reactor

Cited by 41 publications

References 32 publications

Experimentation and mathematical models for partial nitrification in aerobic granular sludge process

Experimentation and mathematical models for partial nitrification in aerobic granular sludge process

Identification of key nitrous oxide production pathways in aerobic partial nitrifying granules

Nitrous oxide emission in autotrophic partial nitritation system: Macro- and microanalyses

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