The influence of changes in groundwater composition on the efficiency of manganese and ammonia nitrogen removal on mature quartz sand filtering beds

2001 ◽  
Vol 1 (2) ◽  
pp. 91-98 ◽  
Author(s):  
R. Bray ◽  
K. Olańczuk-Neyman
Keyword(s):  
Dissolved Oxygen ◽  
Nitrogen Removal ◽  
Quartz Sand ◽  
Nitrogen Concentration ◽  
Ammonia Nitrogen ◽  
Manganese Concentration ◽  
Nitrifying Bacteria ◽  
Lag Phase ◽  
Water Composition ◽  
Oxygen Concentrations

The results of investigations of natural groundwater treatment containing increased manganese and ammonia nitrogen concentrations are presented. The main aim of the work was to show the influence of changes in water composition on manganese and ammonia nitrogen removal from groundwater on second-stage mature quartz sand filters. According to the results obtained, the efficiency of manganese elimination from water did not depend on periodic changes in ammonia nitrogen or dissolved oxygen concentrations. However, if low oxygen concentrations (lower than 2 mg/dm3) were maintained for a longer time, the manganese concentration in the filtrate gradually increased. The ammonia nitrogen concentration in the filtered water appeared to be the most relevant factor affecting the efficient removal of manganese and the dissolved oxygen concentration was less important. The nitrification process appeared to be vulnerable to changes in the concentrations of the substrates: ammonia nitrogen (either an increase or decrease) and oxygen (an decrease). It was observed that it is necessary for nitrifying bacteria to adapt (lag phase) to rapidly changing water composition. Due to the sorption process, the inhibition of nitrification on the filtering beds did not significantly influence the efficiency of ammonia nitrogen removal.

The Study on the Removal of Ammonia Nitrogen in Wastewater by Thin Film Coating Photo-Catalytic Oxidation Process

2013 ◽  
Vol 302 ◽  
pp. 119-123
Author(s):  
Hyun Jong Joo ◽  
Jung Soo Choi ◽  
Dong Wook Kwon ◽  
Sung Chang Hong
Keyword(s):  
Thin Film ◽  
Nitrogen Removal ◽  
Treatment Process ◽  
Film Coating ◽  
Ammonia Nitrogen ◽  
Nitrifying Bacteria ◽  
Thin Film Coating ◽  
Treatment Unit ◽  
Photo Catalyst ◽  
New Process

A new process for advanced wastewater treatment process has been devised with auxiliary treatment unit employing the ammonia oxidizing photo-catalytic thin film. In winter time, due to low water temperature, conventional nitrogen removal treatment experiences almost no nitrification by nitrifying bacteria. To solve the problem and to meet the governmental effluent guideline the treated water has been recycled through the auxiliary unit in which the auxiliary system was applied with the thin film coating photo-catalyst. This study also identifies the characteristics of the thin film coating-photo-catalyst through XRD, SEM and analyzes the ammonia nitrogen removal efficiency by using the thin film coating photo-catalyst in the reactor which resembles a sewage treatment process. The evaluation of the entire process of biological treatment in accord with the application of thin film coating photo-catalyst was performed through computer simulation. A relevant computer model for mass balance was made and utilized to select proper optimal operating condition such as recycle ratio. Result shows the proposed new process has potential applicability to renovate existing treatment plants.

High-Concentration Nitrogen Removal by Anaerobic Ammonium Oxidation Process

2012 ◽  
Vol 518-523 ◽  
pp. 214-217
Author(s):  
Tao Hong Liao ◽  
Kang Huai Liu ◽  
Jia Chun Yang ◽  
Kenji Furukawa
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Removal Rate ◽  
Nitrogen Concentration ◽  
Ammonia Nitrogen ◽  
Ammonium Oxidation ◽  
High Concentration ◽  
Total Nitrogen Concentration ◽  
Load Rate ◽  
Nitrogen Load Rate

This experiment aimed to explore the effect of high- concentration nitrogen removal by Anaerobic ammonium oxidation process. The mixed liquor suspended solid(MLSS)was 510 mg/L. In the beginning of the experiment, the inflow concentration rate of ammonia nitrogen and nitrite nitrogen was about 1:1.3 and the total nitrogen concentration was low. When the reactor reached the ideal treatment effect then gradually increased the total nitrogen concentration, until reaching the maximum nitrogen load rate(NLR) of the reactor. In the temperature of 34.4 °C, PH was 7.23, the inflow concentration of ammonia nitrogen was 223.3 mg. N/L, the inflow concentration nitrite nitrogen was 289.7 mg. N/L, the dissolved oxygen (DO) was 2.3 mg. N/L, the nitrogen load rate (NLR) was 6.08 kg. N / (m3. d), the nitrogen removal rate (NRR) was 5.60 kg. N / (m3. d), the total nitrogen (TN) removal rate was 92.2%, under this conditions, the reactor achieved the best effect.

scholarly journals Comparative Study on Advanced Nitrogen Removal of Landfill Leachate Treated by SBR and SBBR

Water ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3240
Author(s):  
Jinfeng Jiang ◽  
Liang Ma ◽  
Lianjie Hao ◽  
Daoji Wu ◽  
Kai Wang
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Landfill Leachate ◽  
Batch Reactor ◽  
Nitrogen Concentration ◽  
Carbon Sources ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Two Systems ◽  
Advanced Nitrogen Removal

In order to achieve advanced nitrogen removal from landfill leachate without the addition of external carbon sources, a Sequencing Batch Reactor (SBR) and a Sequencing Biofilm Batch Reactor (SBBR) were proposed for the treatment of actual landfill leachate with ammonia nitrogen (NH4+-N) and chemical oxygen demand (COD) concentrations of 1000 ± 100 mg/L and 4000 ± 100 mg/L, respectively. The operating modes of both systems are anaerobic–aerobic–anoxic. After 110 days of start-up and biomass acclimation, the effluent COD and the total nitrogen (TN) of the two systems were 650 ± 50 mg/L and 20 ± 10 mg/L, respectively. The removal rates of COD and total nitrogen could reach around 85% and above 95%, respectively. Therefore, advanced nitrogen removal was implemented in landfill leachate without adding any carbon sources. After the two systems were acclimated, nitrogen removing cycles of SBR and SBBR were 24 h and 20 h, respectively. The nitrogen removing efficiency of SBBR was improved by 16.7% in comparison to SBR. In the typical cycle of the two groups of reactors, the nitrification time of the system was the same, which was 5.5 h, indicating that although the fiber filler occupied part of the reactor space, it had no significant impact on the nitrification performance of the system. At the end of aeration, the internal carbon source content of sludge of SBBR was equivalent to that of the SBR system. However, the total nitrogen concentration of SBBR was only 129 mg/L, which is 33.8% lower than that of SBR at 195 mg/L. The main reason was that biofilm enhanced the simultaneous nitrification and denitrification (SND) effect of the system.

Influence of Ammonia Nitrogen on Treatment of Groundwater Containing iron and Manganese in Aeration-Contact Oxidation Filtration Process

2012 ◽  
Vol 170-173 ◽  
pp. 2414-2418
Author(s):  
Yu Hua Zhao ◽  
Yan Feng Li ◽  
Wen Bo Zhang ◽  
Chun Na Zhang ◽  
Jin Xiang Fu ◽  
...  
Keyword(s):  
Water Treatment ◽  
Nitrogen Concentration ◽  
Great Influence ◽  
Ammonia Nitrogen ◽  
The Other ◽  
Iron Removal ◽  
Manganese Concentration ◽  
Filtration Process ◽  
Contact Oxidation ◽  
Iron And Manganese

Two different kinds of water were treated with aeration-contact oxidation filtration process. One was groundwater containing iron and manganese (GIM), the other was GIM polluted by ammonia (GAIM). The results showed that ammonia has almost no influence on iron removal, but has great influence on manganese. Under the condition of 1m/h filter velocity and 10 mg/L average ammonia nitrogen concentration of inlet，the outlet manganese concentration for GAIM was less than 0.1 mg/L after 315 days. When temperature dropped to 18°C below, the manganese concentration of effluent exceeded 0.1 mg/L. When average ammonia nitrogen concentration of inlet for GAIM dropped to 3.27 mg/L, the manganese concentration of outlet for GAIM was less than 0.1 mg/L in winter. And for GIM, the manganese concentration of outlet was less than 0.1 mg/L only after 52 days. Although the filter velocity increased gradually from 1 to 7 m/h, the manganese concentration of effluent was always less than 0.1 mg/L. Therefore, ammonia pollution in the groundwater greatly increases the difficulty of water treatment.

scholarly journals Comparison of Swine Wastewater Treatment by Microalgae and Heterotrophic Nitrifiers: Focusing on Nitrogen Removal Mechanism Revealed by Microbiological Correlation Analysis

2021 ◽  
Author(s):  
Hui Liu ◽  
Junyu Liang ◽  
Giorgos Markou ◽  
Zhaofeng Song ◽  
Jianfeng Ye
Keyword(s):  
Correlation Analysis ◽  
Nitrogen Removal ◽  
Ammonia Nitrogen ◽  
Heterotrophic Nitrification ◽  
Swine Wastewater ◽  
Nitrifying Bacteria ◽  
Nitrogen Transfer ◽  
Bacterial Strains ◽  
Removal Efficiencies ◽  
Heterotrophic Nitrifying Bacteria

Abstract Swine wastewater (SW) poses a great threat to the environment due to its high-nutrient profiles if not properly managed. Advanced biological treatment method is an efficient method to treat SW by screening potent microalgae or bacterial strains. In this study, activated sludge, nine locally isolated heterotrophic nitrification bacteria and one microalgal strain (Chlorella) were used as inoculums in treating a local SW. Their treatment efficiencies were compared, while the nitrogen removal mechanisms and microbiome profile were explored in detail. It was found that certain heterotrophic nitrification strains had a slight advantage in removing chemical oxygen demand and phosphorus from SW, with the highest removal efficiencies of 83.9% and 76.2%, respectively. The removal efficiencies of ammonia nitrogen and total nitrogen in wastewater by microalgae reached 80.9% and 66.0% respectively, which were far higher than all the heterotrophic nitrification strains. Biological assimilation was the main pathway of nitrogen conversion by microalgae and heterotrophic nitrifying bacteria; especially microalgae showed excellent biological assimilation performance. Correlation analysis showed that Comamonas was highly positively correlated with nitrogen assimilation, while Acidovorax was closely correlated with simultaneous nitrification and denitrification. This study gives a comparison of microalgae and heterotrophic nitrifying bacteria on the nitrogen transfer and transformation pathways.

Biofilms as an Aid to Nitrogen Removal in Sewage Treatment Lagoons

1992 ◽  
Vol 26 (7-8) ◽  
pp. 1707-1716 ◽  
Author(s):  
K. Baskaran ◽  
P. H. Scott ◽  
M. A. Connor
Keyword(s):  
Pilot Study ◽  
Dissolved Oxygen ◽  
Oxygen Concentration ◽  
Nitrogen Removal ◽  
Photosynthetic Activity ◽  
Sewage Treatment ◽  
Ammonia Nitrogen ◽  
Bacterial Biofilms ◽  
Dissolved Oxygen Concentration ◽  
Oxygen Levels

A pilot study of sewage treatment lagoons near Melbourne indicated that the best way to enhance nitrogen removal in such lagoons was to promote nitrification. Combined algal/bacterial biofilms grown on surfaces immersed in the lagoons showed potential for greatly increasing the extent of nitrification. A laboratory study was undertaken to determine the effect of pH, dissolved oxygen concentration, temperature and other factors on the nitrifying capabilities of such biofilms; effective nitrification was observed at temperatures down to 10°C, at pH's down to 5.5 and at dissolved oxygen levels down to 2.5 mg/L. Tanks containing biofilm-coated plates nitrified much more effectively than tanks containing only suspended microbial growths. At dissolved oxygen levels of 2-3 mg/L, up to 30% of the ammonia-nitrogen fed to tanks containing biofilm-coated plates was removed by denitrification. Photosynthetic activity in the biofilm greatly enhanced nitrification efficiencies at low dissolved oxygen levels.

Impact of Partial Backwashing to Ammonia Nitrogen Removal in Biological Aerated Filter

2011 ◽  
Vol 183-185 ◽  
pp. 720-724 ◽  
Author(s):  
Ping Li ◽  
Li Long Yan ◽  
Fang Ma
Keyword(s):  
Low Temperature ◽  
Protective Effect ◽  
Nitrogen Removal ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Ammonia Removal ◽  
Nitrifying Bacteria ◽  
Biological Aerated Filter ◽  
Previous Level ◽  
Aerated Filter

Biological Aerated Filter has the drawback of severe plug under low temperature, and frequent back-washing would cause the bad performance of ammonia removal. To solve these shortcomings, partial backwashing experiment was carried out to test its amelioration effect on Biological Aerated Filter. The result showed that performing backwashing at the 40 cm of filter had strong protective effect on nitrifying bacteria, the ammonia removal could be improved gradually with the highest removal rate of 71.71%. Partial backwashing affected less on ammonia removal and the removal efficiency could be restored to the previous level after the backwashing completed for 2.5 h.

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

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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