Simultaneous partial nitrification, anaerobic ammonium oxidation and denitrification (SNAD) in a full-scale landfill-leachate treatment plant

Wang, Chih Cheng; Lee, Po‐Heng; Kumar, Mathava; Huang, Yu; Sung, Shihwu; Lin, Jium-Ming

doi:10.1016/j.jhazmat.2009.10.052

Cited by 228 publications

(100 citation statements)

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“…The PN-anammox process is applicable to reject water (Desloover et al, 2011;Kampschreur et al, 2008;2009a;Joss et al, 2009;Okabe et al, 2011), landfill leachate (Wang et al, 2010), and wastewater from semiconductor factory (Tokutomi et al, 2011). N 2 O emission from PN-anammox processes, especially from the PN process, has been reported (Desloover et al, 2011;Kampschreur et al, 2008;Okabe et al, 2011).…”

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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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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“…The generation of leachate remains an inevitable consequence of the practice of waste disposal in sanitary landfills (Wang et al 2010). Landfill leachate may contain a high concentration of organic matter such as volatile fatty acids, humic and fulvic compounds; inorganic contaminants such as ammonium, sulphate and chloride; heavy metals and xenobiotic organic substances (Wang et al 2010;Xu et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Landfill leachate may contain a high concentration of organic matter such as volatile fatty acids, humic and fulvic compounds; inorganic contaminants such as ammonium, sulphate and chloride; heavy metals and xenobiotic organic substances (Wang et al 2010;Xu et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…As an example, in the treatment of a landfill leachate, Cema et al (2007) investigated an anaerobic ammonium oxidation (Anammox) process along with autotrophic nitrification and heterotrophic denitrification in one RBC and found that this system was able to completely remove the total inorganic nitrogen. Wang et al (2010) and Xu et al (2010) also applied systems with the integration of partial nitrification, Anammox and heterotrophic denitrification processes in sequencing batch reactors with very good performances in organic matter and nitrogen removal. Some drawbacks of these processes are that they might be very complex to operate and it may take months to achieve its full operation.…”

Section: Introductionmentioning

confidence: 99%

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Denitrification of a landfill leachate with high nitrate concentration in an anoxic rotating biological contactor

et al. 2010

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The denitrification performance of a lab-scale anoxic rotating biological contactor (RBC) using landfill leachate with high nitrate concentration was evaluated. Under a carbon to nitrogen ratio (C/N) of 2, the reactor achieved N-NO(3)(-) removal efficiencies above 95% for concentrations up to 100 mg N-NO(3)(-) l(-1). The highest observed denitrification rate was 55 mg N-NO(3)(-) l(-1) h(-1) (15 g N-NO(3)(-) m(-2) d(-1)) at a nitrate concentration of 560 mg N-NO(3)(-) l(-1). Although the reactor has revealed a very good performance in terms of denitrification, effluent chemical oxygen demand (COD) concentrations were still high for direct discharge. The results obtained in a subsequent experiment at constant nitrate concentration (220 mg N-NO(3)(-) l(-1)) and lower C/N ratios (1.2 and 1.5) evidenced that the organic matter present in the leachate was non-biodegradable. A phosphorus concentration of 10 mg P-PO(4)(3-) l(-1) promoted autotrophic denitrification, revealing the importance of phosphorus concentration on biological denitrification processes.

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“…These are the rotating disk contactors at Pitsea (Great Britain), Mechernich (Germany) and Köllikon (Switzerland), where oxygen depletion due to the high nitrogen load together with low BOD content and sufficiently high process temperature (25ºC or more) favoured local anoxic conditions [10]. Simultaneous partial nitrification, anammox and denitrification at low dissolved oxygen concentration (≈ 0.3 g/l) and sufficiently long solid retention time (12-18 d) were observed in the aeration tanks of a leachate treatment plant in Taiwan [11]. The same combination of processes was also proved for a laboratory/scale rotating biological contactor [12].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Removal from Landfill Leachate by Chemical and Biological Treatment: Process Comparison

Butkovskyi

Jönsson

2017

Eco-Tech

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The efficiency of nitrogen removal from leachate by different chemical and biological methods was explored. The leachate was derived from Filborna landfill (NSR AB, Helsingborg, Sweden) and was characterized as an old leachate with pH = 8.0 and comparatively low concentrations of nitrogen and organic compounds (ca. 150 mg/l NH 4 -N and 500 mg/l COD). Three treatment processes were tested in lab-scale experiments; combined nitrification and denitrification in a sequencing-batch reactor (SBR), one-reactor nitritation-anammox process in a moving-bed biofilm reactor (MBBR) in sequencing-batch configuration and nitrogen precipitation in the form of magnesium-ammonium-phosphate (MAP). State-of-the-art of these processes is described. The conventional combined nitrification/denitrification process allowed 99% removal of inorganic nitrogen with 23 mg NH 4 -N/(l·h) being the highest nitrification rate achieved. Aeration during nitrification step and addition of carbon source according to the stoichiometric ratio for denitrification was required, accounting for the operational costs. The nitritation-anammox process also allowed 99% removal of inorganic nitrogen with 3.7 g NH 4 -N/(m 2 ·d) being the highest process rate achieved while running the reactor at 25°C and pH 8.0. The process is advantageous in comparison with the conventional biological removal process, as oxygen consumption is lower and addition of carbon source is not required. With MAP precipitation at the optimal Mg:N:P ratio (1.2:1:1) only 78% removal of inorganic nitrogen was achieved. The precipitation process led to a significant increase of phosphorous concentrations in the effluent, while external magnesium and phosphorous sources to be added resulted in high process costs. Detailed descriptions of the processes and obtained results are given in the article. Comparing the three processes, conclusions are drawn that it is possible to achieve effluent nitrogen requirements (15 mg N/l) by treatment of leachate with both tested biological processes, but not with MAP precipitation. One-reactor nitritation-anammox would require the lowest operational costs, while MAP precipitation -the highest. KEYWORDSLeachate, nitrogen removal, sequencing batch reactor, Anammox, magnesium ammonium phosphate (struvite), moving-bed biofilm reactor https://doi

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Simultaneous partial nitrification, anaerobic ammonium oxidation and denitrification (SNAD) in a full-scale landfill-leachate treatment plant

Cited by 228 publications

References 44 publications

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

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

Denitrification of a landfill leachate with high nitrate concentration in an anoxic rotating biological contactor

Nitrogen Removal from Landfill Leachate by Chemical and Biological Treatment: Process Comparison

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