Sewage Treatment with Anammox

Kartal, Boran; Kuenen, J.G.; Loosdrecht, M.C.M. van

doi:10.1126/science.1185941

Cited by 1,087 publications

(479 citation statements)

References 12 publications

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“…The technology has been developed to treat ammonium-rich wastewater, such as landfill leachate, digested sludge in a sequential batch reactor (SBR) or upflow anaerobic sludge blanket (UASB) system, etc. (Joss et al 2009;Kartal et al 2010). The anammox activity in recirculated bioreactor was confirmed as "accidental" running (Valencia et al 2011).…”

Section: Introductionmentioning

confidence: 86%

Nitrogen removal through different pathways in an aged refuse bioreactor treating mature landfill leachate

Xie

et al. 2012

Appl Microbiol Biotechnol

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In this study, an aged refuse bioreactor was constructed to remove nitrogen in a mature landfill leachate. The nitrogen removal efficiency and the microbial community composition in the bioreactor were investigated. The results showed that the aged refuse bioreactor removed more than 90 % of total nitrogen in the leachate under the nitrogen loading rate (NLR) of 0.74 g/kg (vs) day, and the total nitrogen removal rate decreased to 62.2 % when NLR increased up to 2.03 g/kg (vs) day. Quantitative polymerase chain reaction results showed that the average cell number of ammoniaoxidizing bacteria in the bioreactor was 1.58×10 8 cells/g, which accounted for 0.41 % of total bacteria. The number of anammox bacteria in the reactor was 1.09×10 8 cells/g, which accounted for 0.27 % of total bacteria. Isotopic 15 N tracing experiments showed that nearly 10 % of nitrogen was removed by anammox. High-throughout 454 pyrosequencing revealed that the predominant bacteria in the bioreactor were Proteobacteria, Chloroflexi, Actinobacteria, Bacteroidetes, and Gemmatimonadetes, including various nitrifiers and denitrifiers with diverse heterotrophic and autotrophic metabolic pathways, supporting that nitrogen was removed through different pathways in this aged refuse bioreactor.

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Section: Introductionmentioning

confidence: 86%

Nitrogen removal through different pathways in an aged refuse bioreactor treating mature landfill leachate

Xie

et al. 2012

Appl Microbiol Biotechnol

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“…Conventionally, biological nitrogen removal is achieved by a combination of nitrification and denitrification processes. In contrast, an alternative and innovative approach is the use of a partial nitrification (PN) process followed by an anaerobic ammonium oxidation (anammox) process (PN-anammox process), which has several advantages, such as no need for external carbon addition, less energy and oxygen 4 requirement, and less sludge production (van Dongen et al, 2001;Kartal et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Source identification of nitrous oxide on autotrophic partial nitrification in a granular sludge reactor

et al. 2013

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Emission of nitrous oxide (N 2 O) during biological wastewater treatment is of growing concern since N 2 O is a major stratospheric ozone-depleting substance and an important greenhouse gas. The emission of N 2 O from a lab-scale granular sequencing batch reactor (SBR) for partial nitrification (PN) treating synthetic wastewater without organic carbon was therefore determined in this study, because PN process is known to produce more N 2 O than conventional nitrification processes. The average N 2 O emission rate from the SBR was 0.32 ± 0.17 mg-N L -1 h -1 , corresponding to the average emission of N 2 O of 0.8 ± 0.4% of the incoming nitrogen load (1.5 ± 0.8% of the converted NH 4 + ). Analysis of dynamic concentration profiles during one cycle of the SBR operation demonstrated that N 2 O concentration in off-gas was the highest just after starting aeration whereas N 2 O concentration in effluent was gradually increased in the initial 40 min of the aeration period and was decreased thereafter. Isotopomer analysis was conducted to identify the main N 2 O production pathway in the reactor during one cycle. The hydroxylamine (NH 2 OH) oxidation pathway accounted for 65% of the total N 2 O production in the initial phase during one cycle, whereas contribution of the NO 2 -reduction pathway to N 2 O production was comparable with that of the NH 2 OH oxidation pathway in the latter phase. In addition, 3 spatial distributions of bacteria and their activities in single microbial granules taken from the reactor were determined with microsensors and by in situ hybridization. Partial nitrification occurred mainly in the oxic surface layer of the granules and ammonia-oxidizing bacteria were abundant in this layer. N 2 O production was also found mainly in the oxic surface layer. Based on these results, although N 2 O was produced mainly via NH 2 OH oxidation pathway in the autotrophic partial nitrification reactor, N 2 O production mechanisms were complex and could involve multiple N 2 O production pathways.

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“…Also, the denitrification activity over nitrite proceeded twice as fast as the denitrification over nitrate (also requiring about 40% less COD). These conditions suggest that it can be potentially feasible to achieve BNR via nitritation and denitritation, contributing to reduce the operational costs of the plants in terms of aeration and external carbon source (Kartal et al, 2010). The latter may further reduce the environmental impact and operational costs (due to the lower gas emissions and because methanol would not be longer required for denitrification).…”

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confidence: 99%

Thermophilic biological nitrogen removal in industrial wastewater treatment

López-Vázquez

Kubare

Saroj

et al. 2013

Appl Microbiol Biotechnol

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Nitrification is an integral part of biological nitrogen removal processes and usually the limiting step in wastewater treatment systems. Since nitrification is often considered not feasible at temperatures higher than 40 o C, warm industrial effluents (with operating temperatures higher than 40 o C) need to be cooled down prior to biological treatment, increasing the energy and operating costs of the plants. This study describes the occurrence of thermophilic biological nitrogen removal activity (nitrititation, nitratation and denitrification)at a temperature as high as 50 o C in an activated sludge wastewater treatment plant treating wastewater from an oil-refinery. The similar nitrititation and nitritatation rates observed between 35 and 50 o C (of 3.3-4.6 mgNH 4 + -N/mgVSS.h and 2.9-4.5 mgNO 2 --N/mgVSS.h, respectively) led to nitrite accumulation. Using a modified 2-step nitrification-2-step denitrification mathematical model extended with the incorporation of double Arrhenius equations, the nitrification (nitrititation and nitratation) and denitrification activities were described including the cease in biomass activity at 55 o C. Fluorescence in situ Hybridization

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Sewage Treatment with Anammox

Cited by 1,087 publications

References 12 publications

Nitrogen removal through different pathways in an aged refuse bioreactor treating mature landfill leachate

Nitrogen removal through different pathways in an aged refuse bioreactor treating mature landfill leachate

Source identification of nitrous oxide on autotrophic partial nitrification in a granular sludge reactor

Thermophilic biological nitrogen removal in industrial wastewater treatment

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