Nitrogen removal from landfill leachate via the nitrite route

Kulikowska, Dorota

doi:10.1590/s0104-66322012000200002

Cited by 15 publications

(9 citation statements)

References 36 publications

(35 reference statements)

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“…At DO at the level of 1.2–1.3 mg/L, the observed nitrification rate was 19.4 mg/L·h. Reduction of DO to 0.8–0.9 mg/L resulted in an increase of the nitrification rate up to 21.1 mg/L·h . A downward trend in DO necessary to obtain the highest possible efficiency of SND was observed with increasing temperature.…”

Section: Resultsmentioning

confidence: 93%

“…According to the information provided by Kulikowska and Guo et al , DO concentration also affects the N‐NH 4 + removal rate. At DO at the level of 1.2–1.3 mg/L, the observed nitrification rate was 19.4 mg/L·h.…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, both quantity and quality of leachate can vary at different sampling sites on the same landfill. Apart from organics and other hazardous substances, landfill leachates, according to the literature , contain also ammonium nitrogen (NH 4 + ) in high concentrations.…”

Section: Introductionmentioning

confidence: 99%

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Biological Treatment of Landfill Leachate at Elevated Temperature in the Presence of Polyurethane Foam of Various Porosity

Koc-Jurczyk

Jurczyk

2016

CLEAN Soil Air Water

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Application of sequencing batch reactors (SBR) for treatment of leachate from old, stabilized landfills, could be still an economically viable solution, as far as nitrogen removal is concerned. Very low amounts of accesible organic compounds requires an unconventional approach to treatment technology. In this paper the authors proposed utilisation of polyurethane (PU) foam of various porosity as a biomass carrier, hydraulic retention time (HRT) extended to 2 days and temperature elevated to 37°C, to stimulate simultaneous nitrification and denitrification (SND). The porosity of PU carriers had no effect on the efficiency of organic compounds removal, whilst the ammonium nitrogen (N-NH 4 þ ) removal efficiency was highest in the reactor (SBR2) equipped with PU cuboidshape carriers of 30 pores per inch (ppi), reaching 77.6%. In the reactor SBR3 filled with 15 ppi foam, the N-NH 4 þ removal efficiency was much lower (54.2%), but still better than observed in reference reactor, SBR1, operated with suspended activated sludge only (46.3%). The average free ammonia concentration in the effluents ranged from 140.18 to 347.98 mg/L at pH 9.6, depending on the reactor. Neither nitrites nor nitrates were found in the effluents, and the kinetics of N-NH 4 þ removal proceeded according to the first-order reaction.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

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Biological Treatment of Landfill Leachate at Elevated Temperature in the Presence of Polyurethane Foam of Various Porosity

Koc-Jurczyk

Jurczyk

2016

CLEAN Soil Air Water

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“…Statistically significant differences in COD concentration were observed between all the reactors (Figure 3a, Table 2). Kulikowska [2012] has applied a similar variant of technological procedure for the treatment of landfill leachates. COD removal efficiency was much higher (75%) than the one obtained in the present study, BOD 5 /COD ratio in raw leachate was higher as well (0.6).…”

Section: Organics Removalmentioning

confidence: 99%

Biological Removal of Ammonia from Municipal Landfill Leachate (Kozodrza, Poland) at Limited Oxygen Access and Presence of Kaldnes Media

Koc-Jurczyk¹,

Jurczyk²

2018

J. Ecol. Eng.

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The effect of filling the sequential batch reactor (SBR) with Kaldnes biomass carrier media on the effectiveness of landfill leachate treatment was examined. The experiment was carried out under limited access to oxygen (0.5-1.0 mg·L -1 ). The raw leachate was characterized with the COD concentration at the level of 7758 mg·L -1 , BOD 5 -904 mg·L -1 , and NH 4 + -980 mg·L -1 . The nitrogen loading rate (NLR) was low and amounted to 0.3 kg·m -3 ·d -1 . The fill fraction had no effect on the concentration of contaminants in effluents, but turned out to be significant as far as the ammonia nitrogen loss rate was concerned. During the first six hours of SBR operation, the reaction rate increased from 0.64 mg·L -1 ·h -1 to 6.85 mg·L -1 ·h -1 with increasing fill fraction. In the remaining time (7-23 h) in the case of the reactor operating only with suspended activated sludge, and the one with 10% of filtration media, the reaction rate was comparable, i.e. 27.24 mg·L -1 ·h -1 and 27.02 mg·L -1 ·h -1 , respectively. Increasing the fill fraction to 20% resulted in a decrease of the reaction rate to 18.28 mg· L -1 ·h -1 .

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“…Anaerobic and aerobic systems have been extensively researched to remove organic matter and ammonia (Kulikowska, 2012). However, they need an external source of carbon for denitrification when the leachate comes from mature landfill.…”

Section: Introductionmentioning

confidence: 99%

The "Chemical Oxygen Demand / Total Volatile Acids" Ratio as an Anaerobic Treatability Indicator for Landfill Leachates

Contrera

Silva

et al. 2015

Braz. J. Chem. Eng.

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-In some operational circumstances a fast evaluation of landfill leachate anaerobic treatability is necessary, and neither Biochemical Methane Potential nor BOD/COD ratio are fast enough. Looking for a fast indicator, this work evaluated the anaerobic treatability of landfill leachate from São Carlos-SP (Brazil) in a pilot scale Anaerobic Sequence Batch Biofilm Reactor (AnSBBR). The experiment was conducted at ambient temperature in the landfill area. After the acclimation, at a second stage of operation, the AnSBBR presented efficiency above 70%, in terms of COD removal, utilizing landfill leachate without water dilution, with an inlet COD of about 11,000 mg.L -1 , a TVA/COD ratio of approximately 0.6 and reaction time equal to 7 days. To evaluate the landfill leachate biodegradability variation over time, temporal profiles of concentration were performed in the AnSBBR. The landfill leachate anaerobic biodegradability was verified to have a direct and strong relationship to the TVA/COD ratio. For a TVA/COD Total ratio lower than 0.20, the biodegradability was considered low, for ratios between 0.20 and 0.40 it was considered medium, and above 0.40 it was considered high.

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Nitrogen removal from landfill leachate via the nitrite route

Cited by 15 publications

References 36 publications

Biological Treatment of Landfill Leachate at Elevated Temperature in the Presence of Polyurethane Foam of Various Porosity

Biological Treatment of Landfill Leachate at Elevated Temperature in the Presence of Polyurethane Foam of Various Porosity

Biological Removal of Ammonia from Municipal Landfill Leachate (Kozodrza, Poland) at Limited Oxygen Access and Presence of Kaldnes Media

The "Chemical Oxygen Demand / Total Volatile Acids" Ratio as an Anaerobic Treatability Indicator for Landfill Leachates

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