Nitrogen removal from wastewater with high ammonia nitrogen concentration via shorter nitrification and denitrification

This thesis put forward the treatment concept of “without Biomass Retention Sequential Batch Intensified Pretreatment (WSIP)” in leachate treatment, for sake of improving performance of nitrogen removal, optimizing excess water’s nutritional ratio and benefitting the follow-up aerobic biological treatment. Based on orthogonal experiment of WSIP Reactor’s leachate treatment performance, Conclusions can be drew: the removal performance of ammonia nitrogen and TN is higher of WSIP, in which short-cut nitrification and denitrification can be realized; HRT, DO and sequential period are remarkable factors of ammonia removal performance, TN removal performance and realization of short-cut nitrification and denitrification; In normal temperature, the most perfect functional parameter of WSIP Reactor is: HRT=4d, DO=0.75mg/L and sequential period is 6h.

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Nitrogen removal from wastewaters by a bio-reactor with partially and fully submerged rotating biofilms

Water Science & Technology ◽

10.2166/wst.1994.0789 ◽

1994 ◽

Vol 29 (10-11) ◽

pp. 431-438 ◽

Cited By ~ 8

Author(s):

Y. Watanabe ◽

D. Y. Bang ◽

K. Itoh ◽

K. Matsui

Keyword(s):

Nitrogen Removal ◽

Organic Material ◽

Municipal Wastewater ◽

Ammonia Nitrogen ◽

Synthetic Wastewater ◽

Poly Vinyl Alcohol ◽

Simultaneous Nitrification And Denitrification ◽

Municipal Wastewater Treatment ◽

Nitrification And Denitrification ◽

Organic Source

This paper concerns simultaneous nitrification and denitrification in a completely mixed bio-reactor with partially and fully submerged rotating biological contactors. The bio-reactor is designed to cause the nitrification and denitrification in partially and fully submerged biofilms, respectively. An experimental investigation was made into the effect of organic material and ratio of influent organic carbon to ammonia nitrogen concentrations(C/N ratio) on the efficiency of simultaneous nitrification and denitrification in the bio-reactor. Settled municipal wastewater and synthetic wastewater containing ammonia nitrogen and organic material such as acetate, ethylene-glycol, phenol and poly-vinyl-alcohol(PVA) were fed into the experimental units. A biofilm dominated by nitrifiers developed on the partially submerged contactors, while a biofilm dominated by heterotrophs developed on the fully submerged contactors. A micro-aerobic environment was formed and biological denitrification occurred in the submerged biofilm. In the municipal wastewater treatment where the influent C/N ratio was around 3.5, the maximum nitrogen removal efficiency was about 60 %. Acetate and ethlene-glycol were effectively used as the organic source of the denitrification. The ability to aerobically degrade PVA was induced by phenol. Once the bacteria inhibiting the biofilm gained the ability to degrade PVA, PVA became an effective organic source of the denitrification.

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High-Concentration Nitrogen Removal by Anaerobic Ammonium Oxidation Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.214 ◽

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.

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

Water ◽

10.3390/w13223240 ◽

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.

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

Water Science & Technology Water Supply ◽

10.2166/ws.2001.0025 ◽

2001 ◽

Vol 1 (2) ◽

pp. 91-98 ◽

Cited By ~ 10

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.

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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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Nitrogen removal from wastewater with high ammonia nitrogen concentration via shorter nitrification and denitrification

Water Science & Technology ◽

10.2166/wst.1997.0362 ◽

1997 ◽

Vol 36 (10) ◽

pp. 73-78 ◽

Cited By ~ 27

Author(s):

Joanna Surmacz-Górska ◽

Andrzej Cichon ◽

Korneliusz Miksch

Keyword(s):

Nitrogen Concentration ◽

Ammonia Nitrogen ◽

Nitrifying Bacteria ◽

Nitrification Rate ◽

Free Nitrous Acid ◽

Oxidation Rates ◽

Activity Inhibition ◽

Nitrite Nitrogen ◽

High Ammonia ◽

Free Ammonium

Shorter nitrification is reached through Nitrobacter bacteria activity inhibition. Nitrobacter bacteria responsible for nitrite nitrogen oxidation are sensitive to free ammonium. The presence of free ammonium depended on a high ammonia nitrogen concentration in wastewater and its pH. It was the pH of the wastewater that was the decisive parameter in Nitrobacter bacteria activity inhibition in stable temperatures and at stable ammonia nitrogen concentrations. Reaction control in the aeration phase of the treatment process guaranteed the concentration of free ammonium within the 1 to 6 mg NH3/l range and at the same time concentration of free nitrous acid did not exceed 0.04 mg HNO2/l. It allowed nitrification to be significantly shortened and to receive build-up of nitrite nitrogen up to 300 mg NO2-N/l. Nitrification rate was about 0.06 g N/g MLSS·d. Measured oxidation rates of particular groups of nitrifying bacteria as oxygen uptake rates by Nitrosomonas and Nitrobacter bacteria respectively made control of shorter nitrification easier and gave insight into the activity of both nitrifier groups.

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Nitrogen Removal with Nitrification and Denitrification via Nitrite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.908.175 ◽

2014 ◽

Vol 908 ◽

pp. 175-178

Author(s):

Jing Xiao ◽

Jin Hua Tang

Keyword(s):

Carbon Source ◽

Nitrogen Removal ◽

Ammonia Concentration ◽

Free Ammonia ◽

Partial Nitrification ◽

High Ammonia ◽

Future Challenges ◽

Do Concentration ◽

Nitrification And Denitrification ◽

Biological Nitrification

Biological nitrification and denitrification via nitrite pathway is technically feasible and economically favorable, especially when wastewater with high ammonium concentrations or low C/N ratios is treated. Therefore, it has attracted more and more attention. It is very important to maintain partial nitrification of ammonium to nitrite. In this paper, the factors that influence operation and efficiency of nitrification and denitrification via nitrite are discussed, including DO concentration, carbon source, aeration pattern, PH, temperature and high free ammonia. High ammonia concentration and temperature are prone to accomplish of short-cut nitrification and denitrification, but limit application in practice. Finally, the review discussed the future challenges for application of short-cut nitrification and denitrification.

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