scholarly journals Experimental research on the treatment of low C/N wastewater by SBBR-UASB combined process

2020 ◽  
Vol 218 ◽  
pp. 03027
Author(s):  
Yafeng Li ◽  
Huixue Hu ◽  
Jianbo Wu
Keyword(s):  
Ammonia Oxidation ◽  
Ammonia Nitrogen ◽  
Uasb Reactor ◽  
Stable Operation ◽  
Coupling Mechanism ◽  
Anaerobic Ammonia Oxidation ◽  
High Ammonia ◽  
Oxidation Stage ◽  
In Series ◽  
Two Stages

The research takes low C/N ratio and high ammonia nitrogen sewage as the treatment object, connects the SBBR reactor and UASB reactor after stable operation in series, and studies the PN-ANAMMOX coupling mechanism. The research analyze the effect of the influencing factors of the nitrification process on the subsequent anaerobic ammonia oxidation stage. The two stages adapt to each other that constantly debug and run. The research investigate its denitrification effect, analyze the biological denitrification mechanism and determine the optimal working conditions.

Research on Startup Process and Influencing Factors of Half-Nitrosofication in CANON Reactor

2013 ◽  
Vol 807-809 ◽  
pp. 1464-1468
Author(s):  
Yi Wang ◽  
La Hua Jin
Keyword(s):  
Ammonia Oxidation ◽  
Accumulation Rate ◽  
Ammonia Nitrogen ◽  
Anammox Bacteria ◽  
Bacteria Growth ◽  
Anaerobic Ammonia Oxidation ◽  
High Ammonia ◽  
Environmental Requirements ◽  
Simulated Wastewater ◽  
Startup Process

The experimental study on startup process of half-nitrosofication for high ammonia nitrogen simulated wastewater has been accomplished with a reactor of completely autotrophic nitrogen removal over nitrite (CANON). The startup process and its influences of the concentration of influent , DO and pH were analyzed with the experimental results. The results show that the conversion rate of to is close to 55%, the accumulation rate of is over 95% and the rate of to steadily keeps as 1.02~1.24 under the condition of influent of 400 mg/L, pH of 7.6~8.2, DO of 0.95~1.3mg/L, HRT of 1.5d and water temperature of 17~27°C, which meet the environmental requirements for anaerobic ammonia oxidation bacteria growth, and half-nitrosofication was achieved in the CANON reactor, which create good conditions for further enrichment of anammox bacteria for the operation of the CANON reactor.

Startup of Seawater Anaerobic Ammonia Oxidation Reactor

2014 ◽  
Vol 884-885 ◽  
pp. 582-585
Author(s):  
Jing Wang ◽  
Jian An Hao ◽  
Ai Jun Zhang ◽  
Bo Yang ◽  
Tian Xiang Jiang ◽  
...  
Keyword(s):  
Retention Time ◽  
Hydraulic Retention Time ◽  
Ammonia Oxidation ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Second Stage ◽  
Nitrite Nitrogen ◽  
Anaerobic Ammonia Oxidation ◽  
Oxidation Reactor ◽  
Two Stages

Muds and water samples collected from the Bohai Sea were selected to build seawater anaerobic ammonia oxidation reactor. The reaction volume was 18 L. The startup of reactor was divided into two stages. The first stage lasted five months and hydraulic retention time was 18L/7 d. The second stage lasted a month and hydraulic retention time was 18L/14 d. Ammonia and nitrite of influent and effluent were monitored. During the first stage, the removal rate of ammonia nitrogen was around 50% and the nitrite nitrogen increased by 50%. During the second stage, the removal rate of ammonia nitrogen reached more than 75% and the removal rate of nitrite nitrogen reached more than 90%. The removal ratio of ammonia nitrogen and nitrate nitrogen was about 1:1.17. These results suggested reactor start-up successful. Microbial community in reactor was monitored by polymerase chain reaction. Once the reactor started, specific bands of anaerobic ammonia oxidation microorganisms were found.

scholarly journals Application of the Anammox in China—A Review

2020 ◽  
Vol 17 (3) ◽  
pp. 1090 ◽  
Author(s):  
Ruolan Wen ◽  
Yue Jin ◽  
Wenjie Zhang
Keyword(s):  
Ammonia Oxidation ◽  
Wastewater Treatment Plants ◽  
Ammonia Nitrogen ◽  
Capital Costs ◽  
Greenhouse Gases Emissions ◽  
Anaerobic Ammonia Oxidation ◽  
High Ammonia ◽  
Nitrogen Concentrations ◽  
Anammox Process ◽  
Selection Of

Anaerobic ammonia oxidation (anammox) has been one of the most innovative discoveries for the treatment of wastewater with high ammonia nitrogen concentrations. The process has significant advantages for energy saving and sludge reduction, also capital costs and greenhouse gases emissions are reduced. Recently, the use of anammox has rapidly become mainstream in China. This study reviews the engineering applications of the anammox process in China, including various anammox-based technologies, selection of anammox reactors and attempts to apply them to different wastewater treatment plants. This review discusses the control and implementation of stable reactor operation and analyzes challenges facing mainstream anammox applications. Finally, a unique and novel perspective on the development and application of anammox in China is presented.

scholarly journals Experimental study on the influencing factors of SBBR nitrosation controlled by sodium chlorate inhibitor

2020 ◽  
Vol 218 ◽  
pp. 03030
Author(s):  
Yafeng Li ◽  
Chong Gao ◽  
Jianbo Wu
Keyword(s):  
Influencing Factors ◽  
Nitrogen Removal ◽  
High Efficiency ◽  
Ammonia Oxidation ◽  
Sodium Chlorate ◽  
Ammonia Nitrogen ◽  
Operating Conditions ◽  
Reaction Conditions ◽  
Anaerobic Ammonia Oxidation ◽  
High Ammonia

The research takes low C/N ratio sewage as the research object, and quickly realizes the accumulation of nitrite nitrogen by adding inhibitors into the SBBR reactor, and realizes the nitrogen removal by anaerobic ammonia oxidation in the reactor. Determining the optimal operating parameters is of farreaching significance for the treatment of wastewater with high ammonia nitrogen and low C/N and achieving economical and efficient nitrogen removal. Control the ammonia oxidation reaction, keep the nitrification process in the nitrosation stage, and realize the rapid accumulation of NO2--N is the problem that the reactor needs to solve. This experiment uses a combination of batch test and periodic test to conduct experimental research on various influencing factors in the partial nitrosation process: temperature, pH, DO and find the best operating conditions to achieve high-efficiency accumulation of NO2--N and optimize the reaction conditions.

scholarly journals Role of pH on biological Nitrification Process

1970 ◽  
Vol 8 (1-2) ◽  
pp. 119-125 ◽  
Author(s):  
Iswar Man Amatya ◽  
Bhagwan Ratna Kansakar ◽  
Vinod Tare ◽  
Liv Fiksdal
Keyword(s):  
Filtration Rate ◽  
Ammonia Oxidation ◽  
Ammonia Nitrogen ◽  
Microbial Kinetics ◽  
Nitrification Process ◽  
Nitrogen Concentrations ◽  
In Series ◽  
Biological Nitrification ◽  
Oxidation Efficiency ◽  
Nitrate And Nitrite

It is important to determine the effect of changing environmental conditions on the microbial kinetics for design and modeling of biological treatment processes. In this research, the kinetics of ammonia oxidation by nitrifying process bacteria under varying pH and temperature conditions are studied. Ammonia oxidation in groundwater was carried out by biological method of nitrification process. The nitrification was performed in one set of reactors. The reactor consists of two columns connected in series packed with over burnt bricks as media. The filtration rate varied from 10.5 to 210.4 m/day for nitrification process respectively. The ammonia, nitrate and nitrite nitrogen concentrations were measured at inlet, intermediate ports and outlet. The temperature varied from 10 to 30°C at 2°C intervals. The results demonstrated that high amounts of ammonia nitrogen nitrified in groundwater at nitrification process. The average ammonia nitrogen oxidation efficiency of 77.27% was achieved from pH 7.3 to 8.0 in the reactor packed with OBB media at 20°C, for the flow rate 500ml/min due to biological nitrification. The total amount of ammonia nitrogen removed by nitrification varied from 0.76 to 17.80 gm/m3/h at influent concentration from 2.84 to 149.28 gm/m3/h.Key words: Over burnt brick; Filtration rate; Temperature; Nitrification and Nitrifying bacteriaDOI: http://dx.doi.org/10.3126/jie.v8i1-2.5102Journal of the Institute of Engineering Vol. 8, No. 1&2, 2010/2011Page: 119-125Uploaded Date: 20 July, 2011

Importance of the ammonia volatilization rates in shallow maturation ponds treating UASB reactor effluent

2012 ◽  
Vol 66 (6) ◽  
pp. 1239-1246 ◽  
Author(s):  
Fernando Augusto Lopes de Assunção ◽  
Marcos von Sperling
Keyword(s):  
Nitrogen Removal ◽  
Ammonia Volatilization ◽  
Ammonia Nitrogen ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Unit Surface Area ◽  
In Series ◽  
Belo Horizonte ◽  
Anaerobic Sludge Blanket

This study aimed at determining the influence of ammonia volatilization on nitrogen removal in polishing (maturation) ponds treating sanitary effluent from upflow anaerobic sludge blanket (UASB) reactors in the city of Belo Horizonte, Brazil. An apparatus for the capture and absorption of volatilized ammonia in three polishing ponds in series was installed. Volatilized ammonia was captured by a chamber on the surface of the ponds and dissolved in boric acid solution, in order to estimate the amount of ammonia per unit surface area of each pond. Low rates of volatilization, below 0.2 kg/ha.d, in about 75% of samples from all the ponds, were observed. The mass balance of ammonia nitrogen of the ponds showed that the volatilization represented only about 2% of the total removal of nitrogen from the polishing ponds. The results obtained suggest that ammonia volatilization was a mechanism of little importance in nitrogen removal in the investigated polishing ponds.

Model experiments on improving nitrogen removal in laboratory scale subsurface constructed wetlands by enhancing the anaerobic ammonia oxidation

2007 ◽  
Vol 56 (3) ◽  
pp. 145-150 ◽  
Author(s):  
D. Paredes ◽  
P. Kuschk ◽  
F. Stange ◽  
R.A. Müller ◽  
H. Köser
Keyword(s):  
Nitrogen Removal ◽  
Ammonia Oxidation ◽  
Operating Conditions ◽  
Laboratory Scale ◽  
Synthetic Wastewater ◽  
Scale Model ◽  
Model Experiments ◽  
Anaerobic Ammonia Oxidation ◽  
High Ammonia ◽  
Process Strategy

Anaerobic ammonia oxidation (Anammox) has been identified as a new general process-strategy for nitrogen removal in wastewater treatment. In order to evaluate the role and effects of the Anammox process in wetlands, laboratory-scale model experiments were performed with planted fixed bed reactors. A reactor (planted with Juncus effusus) was fed with synthetic wastewater containing 150–200 mg L−1 NH+4 and 75–480 mg L−1 NO−2. Under these operating conditions, the plants were affected by the high ammonia and nitrite concentrations and the nitrogen removal rate fell within the same range of 45–49 mg N d−1 (equivalent to 0.64–0.70 g Nm−2d−1) as already reported by other authors. In order to stimulate the rate of nitrogen conversion, the planted reactor was inoculated with Anammox biomass. As a result, the rate of nitrogen removal was increased 4–5-fold and the toxic effects on the plants also disappeared. The results show that, in principle, subsurface flow wetlands can also function as an “Anammox bioreactor”. However, the design of a complete process for the treatment of waters with a high ammonia load and, in particular, the realisation of simple technical solutions for partial nitrification have still to be developed.

scholarly journals Performance of UASB reactors in two stages under different HRT and OLR treating residual waters of swine farming

2013 ◽  
Vol 33 (2) ◽  
pp. 367-378 ◽  
Author(s):  
Estevão Urbinati ◽  
Rose M. Duda ◽  
Roberto A. de Oliveira
Keyword(s):  
Oxygen Demand ◽  
Pilot Scale ◽  
Anaerobic Treatment ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Organic Loading Rate ◽  
Anaerobic Sludge ◽  
In Series ◽  
Two Stages ◽  
Uasb Reactors

In this study it was evaluated the effects of hydraulic retention time (HRT) and Organic Loading Rate (OLR) on the performance of UASB (Upflow Anaerobic Sludge Blanket) reactors in two stages treating residual waters of swine farming. The system consisted of two UASB reactors in pilot scale, installed in series, with volumes of 908 and 188 L, for the first and second stages (R1 and R2), respectively. The HRT applied in the system of anaerobic treatment in two stages (R1 + R2) was of 19.3, 29.0 and 57.9 h. The OLR applied in the R1 ranged from 5.5 to 40.1 kg CODtotal (m³ d)-1. The average removal efficiencies of chemical oxygen demand (COD) and total suspended solids (TSS) ranged, respectively, from 66.3 to 88.2% and 62.5 to 89.3% in the R1, and from 85.5 to 95.5% and 76.4 to 96.1% in the system (R1 + R2). The volumetric production of methane in the system (R1 + R2) ranged from 0.295 to 0.721 m³CH4 (m³ reactor d)-1. It was found that the OLR applied were not limiting to obtain high efficiencies of CODtotal and TSS removal and methane production. The inclusion of the UASB reactor in the second stage contributed to increase the efficiencies of CODtotal and TSS removal, especially, when the treatment system was submitted to the lowest HRT and the highest OLR.

Research on the Start-Up of Anaerobic Ammonia Oxidation and the Influence Factors Experiment

2013 ◽  
Vol 777 ◽  
pp. 221-224 ◽  
Author(s):  
Ya Feng Li ◽  
Wen Jing Zhang
Keyword(s):  
Ammonia Oxidation ◽  
Removal Rate ◽  
Influence Factors ◽  
Engineering Application ◽  
Uasb Reactor ◽  
Optimum Temperature ◽  
N Concentration ◽  
Start Up ◽  
Anaerobic Ammonia Oxidation ◽  
Optimum Ph

Experiment studies the startup of Anammox and the effect of pH and temperature on the denitrification performance of Anammox. We take the UASB reactor for Anammox startup experimental study, and study the removal of NH4+-N and NO2--N under different temperature and pH. Controlling the influent NH4+-N/NO2--N concentration ratio is 1:1.32, the initial concentration of NH4+-N is 50 mg/L, then increase NH4+-N concentration with gradient of 50 mg/L.We detect the influent and effluent NH4+-N and NO2--N and effluent NO3--N concentration .We also Control the temperature (20°C~40°C) and the pH (6.0~9.0) to study the influencing factors. The optimum temperature is 30°C, the removal rate can reach more than 80%, and the optimum pH is 8, the NH4+-N and NO2--N highest removal rate is 82.92% and 87.59%. The effect of the Anammox reaction can be efficient promotion of denitrification and provides theory basis, which provides reference for engineering application on actual conditions.

The Influence of Inorganic Carbon on Anaerobic Ammonia Oxidation

2013 ◽  
Vol 275-277 ◽  
pp. 2226-2229 ◽  
Author(s):  
Jin Xiang Fu ◽  
Xi Jiang ◽  
Jun Zhao
Keyword(s):  
Carbon Source ◽  
Inorganic Carbon ◽  
Ammonia Oxidation ◽  
Nitrate Nitrogen ◽  
Great Influence ◽  
Ammonia Nitrogen ◽  
Oxidation Reactions ◽  
Processing Rate ◽  
Anaerobic Ammonia Oxidation ◽  
Inorganic Carbon Source

Through running anaerobic ammonia oxidation reactors for a few days, we found that inorganic carbon source has great influence on anaerobic ammonia oxidation reactions. The inorganic carbon source increasing, the effect of anaerobic ammonia oxidation bacteria reaction is much better and the processing rate is high. And if there are no inorganic carbon source, anaerobic ammonia oxidation reactions are running anomaly. The processing rate of nitrate nitrogen is about 80%, and the processing rate of ammonia nitrogen is only 30% or so. The anaerobic ammonia oxidation bacteria metabolic is getting worse and worse.

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