Completely Autotrophic Nitrogen-Removal for Treatment of High Ammonia Leachate

2010 ◽  
Vol 113-116 ◽  
pp. 662-665
Author(s):  
Wen De Tian ◽  
Kyoung Jin An ◽  
Zhi Wei Li
Keyword(s):  
Nitrogen Removal ◽  
Removal Rate ◽  
Optimal Operation ◽  
Ammonium Concentration ◽  
Operation Condition ◽  
Partial Nitritation ◽  
Ammonium Removal ◽  
High Ammonia ◽  
Anammox Process ◽  
Autotrophic Nitrogen Removal

This study focused on the feasibility of autotrophic nitrogen removal to treat high ammonia leachate, using combined partial Nitritation and Anammox process. In partial nitritation reactor, the optimal operation condition was found with influent ammonium concentration of 1200 mg/L, DO about 3 mg/L, HRT 3 days and temperature about 31°C at the ratio of NO2-N / NH4-N effluent kept at 1.1, which is a prerequisite for the application of Anammox. In Anammox reactor, more than 85% ammonium is removed at HRT 8 days, temperature 28±1°C, and pH 8. The removal rate of nitrogen and COD in combined partial Nitritation and Anammox process are 90% and 74%, respectively. Thus, a combined process of partial nitritation and a subsequent Anammox could be an alternative solution for ammonium removal for leachate.

scholarly journals Ammonium removal by a novel heterotrophic nitrifying and aerobic denitrifying bacterium Pseudomonas stutzeri KTB from wastewater

2015 ◽  
Vol 50 (3) ◽  
pp. 219-227 ◽  
Author(s):  
Maohong Zhou ◽  
Hairen Ye ◽  
Xiaowei Zhao
Keyword(s):  
Nitrogen Removal ◽  
Removal Rate ◽  
Pseudomonas Stutzeri ◽  
Culture Conditions ◽  
Aerobic Denitrification ◽  
Ammonium Concentration ◽  
Logarithmic Phase ◽  
Ammonium Removal ◽  
Removal Ratio ◽  
Initial Ph

The effects of culture conditions on a newly isolated Pseudomonas stutzeri KTB's ability to simultaneously perform heterotrophic nitrification and aerobic denitrification were investigated to determine its potential of application in nitrogen removal from wastewater. The results from experiments in the presence of 10 mmol/L of ammonium were as follows: succinate was the preferred carbon source, and the optimum C/N ratio, temperature, and initial pH were 10, 30 °C, and 7–8, respectively. Nitrogen removal took place not only in the logarithmic phase but also in the stationary phase. Under the optimum conditions, the nitrogen removal rate increased as the ammonium concentration elevated, until it was as high as 60 mmol/L. Meanwhile, the maximum specific growth rate decreased. The highest nitrogen removal rate of 0.977 mmol/L/h was observed at 60 mmol/L of ammonium and the maximum removal ratio of 85.6% at 40 mmol/L when the bacterial treatment for 48 h was completed. The strain was vulnerable to even higher ammonium loads. When incubated in anaerobically digested hennery wastewater containing 43.85 mmol/L of ammonium and 2.32 mmol/L of nitrate, the removal ratio and rate reached 82.4% and 0.397 mmol/L/h, respectively. The strain might be a great candidate for ammonium removal from wastewater.

scholarly journals Promotion of partial nitritation-anammox process by improving granule proportion

2017 ◽  
Vol 75 (11) ◽  
pp. 2580-2585 ◽  
Author(s):  
Jun Cheng ◽  
Liang Zhang ◽  
Yandong Yang ◽  
Shujun Zhang ◽  
Xiaoyu Han ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
System Performance ◽  
Mass Fraction ◽  
Removal Rate ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Ammonium Oxidation ◽  
Partial Nitritation ◽  
Granule Fraction ◽  
Anammox Process

For enhancing the partial nitritation-anammox (PN/A) process, the effects of granule fraction on system performance were investigated in this study. Two sequencing batch reactors (SBRs) were inoculated with PN/A biomass with a floc mass fraction of 53%. In SBR1, when the nitrogen removal rate (NRR) was stable, flocculent sludge was gradually discharged from the reactor using a screen, and the granule fraction was therefore increased. However, nitrogen removal was not improved and finally deteriorated due to the loss of nitritation activity. In SBR2, most flocculent sludge was eliminated and granular proportion was maintained at over 90% by controlling a short settling and decanting time. NRR was low initially but gradually improved to 1.23 kg N/(m3·d), which was 54% higher than SBR1. Ammonium oxidation activities of flocs and granules were respectively measured. Results suggested that the increase of nitritation activity in the granules was the main reason for the improvement of nitrogen removal in SBR2.

Dissolved oxygen as a factor influencing nitrogen removal rates in a one-stage system with partial nitritation and Anammox process

2011 ◽  
Vol 64 (5) ◽  
pp. 1009-1015 ◽  
Author(s):  
G. Cema ◽  
E. Płaza ◽  
J. Trela ◽  
J. Surmacz-Górska
Keyword(s):  
Dissolved Oxygen ◽  
Oxygen Concentration ◽  
Nitrogen Removal ◽  
Pilot Plant ◽  
Removal Rate ◽  
Waste Water Treatment Plant ◽  
Removal Rates ◽  
Partial Nitritation ◽  
Do Concentration ◽  
Anammox Process

A biofilm system with Kaldnes biofilm carrier was used in these studies to cultivate bacteria responsible for both partial nitritation and Anammox processes. Due to co-existence of oxygen and oxygen-free zones within the biofilm depth, both processes can occur in a single reactor. Oxygen that inhibits the Anammox process is consumed in the outer layer of the biofilm and in this way Anammox bacteria are protected from oxygen. The impact of oxygen concentration on nitrogen removal rates was investigated in the pilot plant (2.1 m3), supplied with reject water from the Himmerfjärden Waste Water Treatment Plant. The results of batch tests showed that the highest nitrogen removal rates were obtained for a dissolved oxygen (DO) concentration around 3 g O2 m−3. At a DO concentration of 4 g O2 m−3, an increase of nitrite and nitrate nitrogen concentrations in the batch reactor were observed. The average nitrogen removal rate in the pilot plant during a whole operating period oscillated around 1.3 g N m−2d−1 (0.3 ± 0.1 kg N m−3d−1) at the average dissolved oxygen concentration of 2.3 g O2 m−3. The maximum value of a nitrogen removal rate amounted to 1.9 g N m−2d−1 (0.47 kg N m−3d−1) and was observed for a DO concentration equal to 2.5 g O2 m−3. It was observed that increase of biofilm thickness during the operational period, had no influence on nitrogen removal rates in the pilot plant.

A one-stage system with partial nitritation and Anammox processes in the moving-bed biofilm reactor

2007 ◽  
Vol 55 (8-9) ◽  
pp. 19-26 ◽  
Author(s):  
B. Szatkowska ◽  
G. Cema ◽  
E. Plaza ◽  
J. Trela ◽  
B. Hultman
Keyword(s):  
Nitrogen Removal ◽  
Pilot Plant ◽  
Removal Rate ◽  
Biofilm Reactor ◽  
Waste Water Treatment Plant ◽  
Partial Nitritation ◽  
One Stage ◽  
Batch Tests ◽  
Stage System ◽  
Anammox Process

The ability of bacterial cultures to create biofilm brings a possibility to enhance biological wastewater treatment efficiency. Moreover, the ability of Anammox and Nitrosomonas species to grow within the same biofilm layer enabled a one-stage system for nitrogen removal to be designed. Such a system, with Kaldnes rings as carriers for biofilm growth, was tested in a technical pilot plant scale (2.1 m3) at the Himmerfjärden Waste Water Treatment Plant (WWTP) in the Stockholm region. The system was directly supplied with supernatant originating from dewatering of digested sludge containing high ammonium concentrations. Nearly 1-year of operational data showed that during the partial nitritation/Anammox process, alkalinity was utilised parallel to ammonium removal. The process resulted in a small pH drop, and its relationship with conductivity was found. The nitrogen removal rate for the whole period oscillated around 1.5 g N m−2d−1 with a maximum value equal to 1.9 g N m−2d−1. Parallel to the pilot plant experiment, a series of batch tests were run to investigate the influence on removal rates of different dissolved oxygen conditions and addition of nitrite. The highest nitrogen removal rate (5.2 g N m−2d−1) in batch tests was obtained when the Anammox process was stimulated by the addition of nitrite. In the simultaneous partial nitritation and Anammox process, the partial nitritation was the rate-limiting step.

Combination of ion exchange and partial nitritation/Anammox process for ammonium removal from mainstream municipal wastewater

2014 ◽  
Vol 70 (1) ◽  
pp. 144-151 ◽  
Author(s):  
Andriy Malovanyy ◽  
Elzbieta Plaza ◽  
Jozef Trela ◽  
Myroslav Malovanyy
Keyword(s):  
Ion Exchange ◽  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Municipal Wastewater Treatment ◽  
Nacl Solution ◽  
Treatment Technology ◽  
Batch Mode ◽  
Partial Nitritation ◽  
Ammonium Removal ◽  
Anammox Process

In this study, a new technology of nitrogen removal from mainstream municipal wastewater is proposed. It is based on ammonium removal by ion exchange and regeneration of ion exchange material with 10–30 g/L NaCl solution with further nitrogen removal from spent regenerant by partial nitritation/Anammox process. Influence of regenerant strength on performance of ion exchange and biological parts of the proposed technology was evaluated. Moreover, the technology was tested in batch mode using pretreated municipal wastewater, strong acid cation (SAC) resin and partial nitritation/Anammox biomass. It was shown that with ion exchange it is possible to remove 99.9% of ammonium from wastewater while increasing the concentration of ammonium in spent regenerant by 18 times. Up to 95% of nitrogen from spent regenerant, produced by regeneration of SAC resin with 10 g/L NaCl solution, was removed biologically by partial nitritation/Anammox biomass. Moreover, the possibilities of integration of the technology into municipal wastewater treatment technology, and the challenges and advantages are discussed.

scholarly journals Application of combined process of partial nitritation - anammox using a rotating biological contactor (PARBC) to treat ammonium-rich wastewater

2016 ◽  
Vol 19 (4) ◽  
pp. 5-16
Author(s):  
Hien Nhu Nguyen ◽  
Van Thi Thanh Truong ◽  
Son Thanh Le ◽  
Nhat The Phan ◽  
Dan Phuoc Nguyen
Keyword(s):  
Nitrogen Removal ◽  
Removal Rate ◽  
Synthetic Wastewater ◽  
Anammox Bacteria ◽  
Rotating Biological Contactor ◽  
Combined Process ◽  
Partial Nitritation ◽  
Anammox Activity ◽  
Startup Time ◽  
Autotrophic Nitrogen Removal

Combining the partial Nitritation and Anammox using a rotating biological contactor (PARBC) to remove the ammonium in wastewater was evaluated in this study. The accumulation of Anammox bacteria on the carrier easily obtained after 5 days operating of sequence batch with synthetic wastewater. Then AOB biomass cultivated in PARBC to complete the process of combining two bacteria in the same reactor for completely autotrophic nitrogen removal. After 60 batches of the operation, highest nitrogen removal rate reached 0.33 kg N/m3.d with nitrogen removal efficiency is 90% at a concentration of ammonium input of 250 mg N/L. The specific Anammox activity (SAA) of biofilm and suspended sludge in the tank is determined to be 0.298 gN-N2/gVSS/day and 0.0041 gN-N2/gVSS/day, respectively. Moreover, the suspended sludge concentration is 17.765 mg MLSS/L. This result showed that Anammox bacteria adapt and grow on the rotating biological carrier; otherwise Anammox bacteria hardly develop in the form of suspended sludge in the tank. This study shows that the PARBCR has great potential to effectively removing ammonium from wastewater with the short startup time.

scholarly journals Anammox biofilm process using sugarcane bagasse as an organic carrier

2021 ◽  
Vol 26 (1) ◽  
pp. 25
Author(s):  
Zulkarnaini Zulkarnaini ◽  
Puti Sri Komala ◽  
Arief Almi
Keyword(s):  
Sugarcane Bagasse ◽  
Nitrogen Removal ◽  
Removal Rate ◽  
Nitrogen Loading ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Ammonium Oxidation ◽  
Biofilm Process ◽  
Anaerobic Sludge Blanket ◽  
Anammox Process

The anaerobic ammonium oxidation (anammox) biofilm process commonly uses various inorganic carriers to enhance nitrogen removal under anaerobic conditions. This study aims to analyze the performance of nitrogen removal in anammox process using sugarcane bagasse as an organic carrier. The experiment was carried out by using an up‐flow anaerobic sludge blanket (UASB) reactor for treating artificial wastewater at room temperature. The reactor was fed with ammonium and nitrite with the concentrations of 70‐150 mg–N/L and variations in the hydraulic retention time of 24 and 12 h. The granular anammox belongs to the genus Candidatus Brocadia sinica that was added as an inoculum of the reactor operation. The experimental stoichiometric of anammox for ΔNO2‐–N: ΔNH4+–N and ΔNO3‐: ΔNH4+ were 1.24 and 0.18, respectively, which is similar to anammox stoichiometry. The maximum Nitrogen Removal Rate (NRR) has achieved 0.29 kg–N/m3.d at Nitrogen Loading Rate (NLR) 0.6 kg–N/m3.d. The highest ammonium conversion efficiency (ACE) and nitrogen removal efficiency (NRE) were 88% and 85%, respectively. Based on this results, it indicated that sugarcane bagasse as organic carriers could increase the amount of total nitrogen removal by provided of denitrification process but inhibited the anammox process at a certain COD concentration.

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