High-Rate Nitrification Using Aerobic Granular Sludge

Tsuneda, Satoshi; Ogiwara, Motoki; Ejiri, Y.; Hirata, Akira

doi:10.2166/wst.2006.087

Cited by 19 publications

(8 citation statements)

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“…Several references show successful results of nitrogen removal through nitrification and denitrification processes by granular sludge (Mosquerra-Corral et al 2005;Qin & Liu 2006;Tsuneda et al 2006). In this study, nutrients are present in the system only to allow biomass metabolic processes.…”

Section: Organic Matter Degradationmentioning

confidence: 90%

Start-up of an aerobic granular sequencing batch reactor for the treatment of winery wastewater

López-Palau

Dosta

Mata‐Alvarez

2009

Water Science and Technology

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Aerobic granular sludge was cultivated in a sequencing batch reactor (SBR) in order to remove the organic matter present in winery wastewater. The formation of granules was performed using a synthetic substrate. The selection parameter was the settling time, as well as the alternation of feast-famine periods, the air velocity and the height/diameter ratio of the reactor. After 10 days of operation under these conditions, the first aggregates could be observed. Filamentous bacteria were still present in the reactor but they disappeared progressively. During the start-up, COD loading was increased from 2.7 to 22.5 kg COD/(m(3) day) in order to obtain a feast period between 30 and 60 minutes. At this point, granules were quite round, with a particle diameter between 3.0 and 4.0 mm and an average density of 6 g L(-1). After 120 days of operation, synthetic media was replaced by real winery wastewater, with a COD loading of 6 kg COD/(m(3) day). The decrease of the organic load implied a reduction of the aggregate diameter and a density increase up to 13.2 g L(-1). The effluent was free of organic matter and the solids concentration in the reactor reached 6 g VSS L(-1).

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Section: Organic Matter Degradationmentioning

confidence: 90%

Start-up of an aerobic granular sequencing batch reactor for the treatment of winery wastewater

López-Palau

Dosta

Mata‐Alvarez

2009

Water Science and Technology

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“…, 2003). Granules were then inoculated to a continuous stirred tank reactor with an effective volume of 1.0 l (Tsuneda et al. , 2006) and had been cultured for another 600 days to ensure that the granules attain steady state.…”

Section: Methodsmentioning

confidence: 99%

Microbial community structure in autotrophic nitrifying granules characterized by experimental and simulation analyses

Matsumoto

Katoku

Saeki

et al. 2009

Environmental Microbiology

108

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This study evaluates the community structure in nitrifying granules (average diameter of 1600 mum) produced in an aerobic reactor fed with ammonia as the sole energy source by a multivalent approach combining molecular techniques, microelectrode measurements and mathematical modelling. Fluorescence in situ hybridization revealed that ammonia-oxidizing bacteria dominated within the first 200 mum below the granule surface, nitrite-oxidizing bacteria a deeper layer between 200 and 300 mum, while heterotrophic bacteria were present in the core of the nitrifying granule. Presence of these groups also became evident from a 16S rRNA clone library. Microprofiles of NH(4)(+), NO(2)(-), NO(3)(-) and O(2) concentrations measured with microelectrodes showed good agreement with the spatial organization of nitrifying bacteria. One- and two-dimensional numerical biofilm models were constructed to explain the observed granule development as a result of the multiple bacteria-substrate interactions. The interaction between nitrifying and heterotrophic bacteria was evaluated by assuming three types of heterotrophic bacterial growth on soluble microbial products from nitrifying bacteria. The models described well the bacterial distribution obtained by fluorescence in situ hybridization analysis, as well as the measured oxygen, nitrite, nitrate and ammonium concentration profiles. Results of this study are important because they show that a combination of simulation and experimental techniques can better explain the interaction between nitrifying bacteria and heterotrophic bacteria in the granules than individual approaches alone.

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“…[12] The aerobic granular sludge process has potential for treating high-strength ammonium wastewaters. Tsuneda et al [13] removed > 80% NH + 4 in the treatment of 500 mg-NH + 4 -N l −1 in an aerobic upflow fluidized bed that was aerated by pure oxygen. Wei et al [14] removed 92.3%, 61.9%, and 39.3% of NH + 4 -N using granular * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Use of aerobic granules for treating synthetic high-strength ammonium wastewaters

Wan

Lei

et al. 2014

Environmental Technology

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In this work, two identical sequencing batch reactors (SBRs) with mature aerobic granules were utilized to treat synthetic high-strength ammonium wastewaters with chemical oxygen demand (COD)/total nitrogen (TN) ratios of 3.9-6.9. The contributions of various mechanisms to the removal of ammonium were determined. Ammonium levels of 600-2000 mg-N l-1 had little adverse effect on the COD removal rate (91.6%-95.3%) with an influent COD of 4490-9860 mg l-1. The TN removal rate was slightly reduced from 71.3% to 59.6% as the influent ammonium concentration was increased from 600 to 2000 mg-N l-1. Experimental results indicated that aerobic granules removed 94.5% of COD and 59.6% of TN in the treatment of synthetic high-strength wastewater (9860 mg-COD l-1 and 2000 mg NH+4-Nl-1) during a 12 h cycle. Granular adsorption, air stripping and conversion by nitrification/denitrification were responsible for removing 9%, 15% and 76%, respectively, of the total removed NHf -N. Dissolved oxygen (DO) was a useful process indicator of the biological reactions in the treatment of high-level ammonium wastewaters.

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High-Rate Nitrification Using Aerobic Granular Sludge

Cited by 19 publications

References 0 publications

Start-up of an aerobic granular sequencing batch reactor for the treatment of winery wastewater

Start-up of an aerobic granular sequencing batch reactor for the treatment of winery wastewater

Microbial community structure in autotrophic nitrifying granules characterized by experimental and simulation analyses

Use of aerobic granules for treating synthetic high-strength ammonium wastewaters

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