The Nitrogen Removal on landfill leachate treatment In reeds Wetland

1998 ◽

Vol 25 (5) ◽

pp. 854-863 ◽

Cited By ~ 3

Author(s):

D M Shiskowski ◽

D S Mavinic

Keyword(s):

Nitrogen Removal ◽

Landfill Leachate ◽

Retention Time ◽

Biological Process ◽

Inorganic Nitrogen ◽

Ammonia Removal ◽

Leachate Treatment ◽

High Ammonia ◽

Solids Retention ◽

Total Inorganic Nitrogen

This bench-scale study investigated the nitrogen-removal capabilities of two different biological process configurations treating methanogenic-state landfill leachate containing up to 1200 mg N/L of ammonia. The first configuration was a pre-denitrification system known as the modified Ludzack-Ettinger (MLE) process. Large clarifier sludge recycle flows, set to yield clarifier recycle ratios of 7:1 and 8:1, were evaluated as a means to reduce effluent NOx concentrations. A pre- and post-denitrification system, known as the four-stage Bardenpho process, was the second configuration evaluated. The MLE systems (20 day aerobic solids retention time (SRT)) were capable of producing effluent containing about 50 mg N/L of ammonia and 200-235 mg N/L of total inorganic nitrogen (ammonia + NOx) when treating leachate containing approximately 1200 mg N/L of ammonia. In contrast, effluent from the four-stage Bardenpho system contained less than 1 mg N/L of ammonia and 15 mg N/L of NOx, when treating 1100 mg N/L ammonia leachate. An aerobic number 1 SRT of 20 days (total aerobic SRT approximately equal to 40 days) was used with aerobic number 1 and clarifier sludge recycle ratios of 4:1 and 3:1, respectively. The ammonia-removal potential of both systems was clearly demonstrated but each system also showed certain disadvantages, characteristic of each process.Key words: ammonia-N, anoxic denitrification, leachate treatment, nitrification, pre-denitrification.

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High ammonia landfill leachate treatment using anaerobic filter and rotating biological contactor

Canadian Journal of Civil Engineering ◽

10.1139/l95-115 ◽

1995 ◽

Vol 22 (5) ◽

pp. 992-1000 ◽

Cited By ~ 5

Author(s):

J. Paul Henderson ◽

James W. Atwater

Keyword(s):

Nitrogen Removal ◽

Landfill Leachate ◽

Ammonia Removal ◽

Cod Removal ◽

Simultaneous Nitrification And Denitrification ◽

Leachate Treatment ◽

Rotating Biological Contactor ◽

Loading Rates ◽

Anaerobic Filter ◽

High Ammonia

A pre-denitrifying anaerobic filter and a rotating biological contactor (RBC) were used to remove nitrogen from a high ammonia landfill leachate collected from a municipal and industrial solid waste landfill in Kaohsiung, Taiwan, Republic of China. The research indicated that greater than 95% ammonia removal from high ammonia-N (2140 mg/L) leachate can be achieved with RBC ammonia-N loading rates up to 1.5 g/(m2∙d). At RBC loading rates of 1.5–3.0 g/(m2∙d), ammonia removal ranged from 80% to 90%. Nitrogen removal averaged 66%, including an estimated 54% removal in the RBC. Nitrogen removal in the RBC was the result of either simultaneous nitrification and denitrification or air stripping of ammonia in combination with nitrification. Both alkalinity consumption and COD removal results support the explanation of simultaneous nitrification and denitrification (potentially aerobic denitrification); but since RBC off-gasses were not monitored, neither theory can be confirmed. The high nitrogen removal in the RBC suggests that for this leachate the anaerobic filter was not required for ammonia and nitrogen removal. BOD and COD removal averaged 92% and 49% respectively. Key words: landfill, leachate, treatment, ammonia, rotating biological contactor (RBC), nitrification, denitrification.

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Characterization of landfill leachate by spectral-based surrogate measurements during a combination of different biological processes and activated carbon adsorption

Water Science & Technology ◽

10.2166/wst.2020.317 ◽

2020 ◽

Vol 81 (12) ◽

pp. 2606-2616

Author(s):

Chenjia Shao ◽

Yongyuan Yang ◽

Ze Liu ◽

Qiaoling Wang ◽

Zengwen Ji ◽

...

Keyword(s):

Nitrogen Removal ◽

Landfill Leachate ◽

Maximum Adsorption Capacity ◽

Activated Carbon Adsorption ◽

Leachate Treatment ◽

Visible Absorption ◽

Excitation Emission Matrix ◽

Treatment Processes ◽

Carbon Adsorption ◽

Gac Adsorption

Abstract Surrogate measurements based on excitation-emission matrix fluorescence spectra (EEMs) and ultraviolet-visible absorption spectra (UV-vis) were used to monitor the evolution of dissolved organic matter (DOM) in landfill leachate during a combination of biological and physical-chemical treatment consisting of partial nitritation-anammox (PN-Anammox) or nitrification-denitrification (N-DN) combined with granular active carbon adsorption (GAC). PN-Anammox resulted in higher nitrogen removal (81%), whereas N-DN required addition of an external carbon source to increase nitrogen removal from 24% to 56%. Four DOM components (C1 to C4) were identified by excitation-emission matrix-parallel factor analysis (EEM-PARAFAC). N-DN showed a greater ability to remove humic-like components (C1 and C3), while the protein-like component (C4) was better removed by PN-Anammox. Both biological treatment processes showed limited removal of the medium molecular humic-like component (C2). In addition, the synergistic effect of biological treatments and adsorption was studied. The combination of PN-Anammox and GAC adsorption could remove C4 completely and also showed a good removal efficiency for C1 and C2. The Thomas model of adsorption revealed that GAC had the maximum adsorption capacity for PN-Anammox treated leachate. This study demonstrated better removal of nitrogen and fluorescence DOM by a combination of PN-Anammox and GAC adsorption, and provides practical and technical support for improved landfill leachate treatment.

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Influence of seasonal temperature change on autotrophic nitrogen removal for mature landfill leachate treatment with high-ammonia by partial nitrification-Anammox process

Journal of Environmental Sciences ◽

10.1016/j.jes.2020.09.031 ◽

2021 ◽

Vol 102 ◽

pp. 291-300 ◽

Cited By ~ 1

Author(s):

Xiang Li ◽

Ming-yu Lu ◽

Yong Huang ◽

Yi Yuan ◽

Yan Yuan

Keyword(s):

Temperature Change ◽

Nitrogen Removal ◽

Landfill Leachate ◽

Partial Nitrification ◽

Seasonal Temperature ◽

Leachate Treatment ◽

High Ammonia ◽

Mature Landfill Leachate ◽

Anammox Process ◽

Autotrophic Nitrogen Removal

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Potential and limits of landfill leachate treatment in a multi-stage subsurface flow constructed wetland – Evaluation of organics and nitrogen removal

Bioresource Technology ◽

10.1016/j.biortech.2017.03.185 ◽

2017 ◽

Vol 236 ◽

pp. 146-154 ◽

Cited By ~ 16

Author(s):

Ewa Wojciechowska

Keyword(s):

Nitrogen Removal ◽

Constructed Wetland ◽

Landfill Leachate ◽

Subsurface Flow ◽

Leachate Treatment ◽

Multi Stage ◽

Subsurface Flow Constructed Wetland ◽

Wetland Evaluation

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Removal of Ammonia Nitrogen from Landfill Leachate by Ultrasound/Ultraviolet Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.448-453.536 ◽

2013 ◽

Vol 448-453 ◽

pp. 536-539

Author(s):

Bin Liu ◽

Xu Ya Peng ◽

Qi Tian ◽

Hua Zhao

Keyword(s):

Removal Efficiency ◽

Nitrogen Removal ◽

Landfill Leachate ◽

Nitrogen Concentration ◽

Ammonia Nitrogen ◽

Aeration Rate ◽

Ammonia Removal ◽

Ultrasonic Power ◽

High Concentration ◽

Leachate Treatment

Landfill leachate treatment is a major problem to be solved in the field of environmental protection, and ammonia nitrogen is one of the major pollutants in landfill leachate, whose processing technology needs further improvement. In this paper, ultrasound/ultraviolet co-oxidation technology was directly applied to the treatment of high concentration landfill leachate without the pretreatment operations of dilution, filter, and adjusting the pH conditions. The results showed that: ultrasonic and ultraviolet had certain effects on the ammonia nitrogen removal, and the ammonia nitrogen removing effects became better when the ultrasonic power was greater, or the ultraviolet wavelength was shorter. When the ultrasonic power was 100 W, the ammonia nitrogen removal efficiency was 25.2%, and the UV of 254 nm could decompose 20.2% of the ammonia nitrogen in landfill leathate. In the condition of aeration, ultrasonic and ultraviolet had good synergistic effect on leachate ammonia nitrogen treatment. When the ultrasonic power was 100 W, UV wavelength was 254 nm, and the aeration rate was 150 L/h, the ammonia removal efficiency of high concentration leachate (ammonia nitrogen concentration of 1800 mg/L) reached 98.5% after 6 hours. The paper's research results provide a useful reference for the removal of landfill leachate ammonia nitrogen.

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