Studies the Factors of the Simultaneous Removal of Nitrogen and Carbon on Membrane Aeration Bioreactor

2013 ◽  
Vol 663 ◽  
pp. 403-408
Author(s):  
Wen Jie Li ◽  
Yun Wu ◽  
Hui Jia
Keyword(s):  
Dissolved Oxygen ◽  
Removal Efficiency ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Transmembrane Pressure ◽  
Simultaneous Removal ◽  
Membrane Aeration ◽  
Point Pressure ◽  
The Relationship ◽  
Oxygen Supply Rate

A Membrane aerated bioreactor (MABR) capable of simultaneous nitrification and denitrification in a single reactor vessel was developed to investigate the factors of the simultaneous removal of nitrogen and carbon. The results showed that when the bubble point pressure of membrane modules is 25kPa, the relationship between oxygenation efficiency and intransmembrane pressure were not positively correlated, controlling the transmembrane pressure was 15kPa, oxygen supply rate (OSR) was the highest. During the earlier stage of operation, reducing the hydraulic retention time of MABR could improve the integral removal efficiency, when the HRT was 2h, the removal of COD and ammonia - nitrogen were respectively 70.29% and 52.3%. The dissolved oxygen in the reactor had a significant influence, with the dissolved oxygen （DO） concentration about 0.5mg/L, ammonia-nitrogen and total nitrogen removal efficiency was better, the removal rate were 79.5% and 63% respectively. The reaction tank had CO2 accumulation, and caused pH reduced to 5.8, the operation should maintain the pH at 7.5 by increasing the alkalinity of the raw water.

Study on the Treatment of Tannery Wastewater with the High Concentration of Ammonia Nitrogen by MBR

2011 ◽  
Vol 71-78 ◽  
pp. 2186-2189 ◽  
Author(s):  
Jian Gen Wang ◽  
Ya Hui Liu
Keyword(s):  
Dissolved Oxygen ◽  
Removal Efficiency ◽  
Membrane Bioreactor ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Tannery Wastewater ◽  
Tannery Effluent ◽  
Treatment Efficiency ◽  
High Concentration ◽  
Membrane Flux

The removal efficiency of CODCr and ammonia nitrogen of the high concentration of ammonia nitrogen from tannery effluent by membrane bioreactor (MBR) was investigated. The results showed that when the operation of MBR is stable, influent CODCr loads are less than 4.8 kg/m3•d, the average removal rate of CODCr was over 88%, the removal rate of ammonia nitrogen reached to 90%; when dissolved oxygen (DO) was 1.2mg/L and 1.8 mg/L, the reactor still has excellent treatment efficiency, and the removal rate of CODCr and ammonia nitrogen can achieved over 90%. In addition, through the study of membrane flux, it is easy to find that membrane flux decreases rapidly, the membrane requires periodic cleansing.

Study on the Relationship between Population Density of Noctiluca scintillans and Environmental Factors in the Coastal Waters of Qinhuangdao

2014 ◽  
Vol 1010-1012 ◽  
pp. 635-638
Author(s):  
Yan Juan Xi ◽  
Zhen Liang Zhao ◽  
Chun Long Zhao ◽  
Yan Qin Xi ◽  
Li Yan ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Population Density ◽  
Correlation Analysis ◽  
Dissolved Oxygen ◽  
Linear Correlation ◽  
Coastal Waters ◽  
Ammonia Nitrogen ◽  
Noctiluca Scintillans ◽  
Nitrite Nitrate ◽  
The Relationship

Based on the environmental survey data in off-shore of Qin Huangdao from May to June 2011,correlation analysis was made between population density of Noctiluca scintillans and environmental factors. The results indicates that population density of Noctiluca scintillans does not exist linear correlation with nitrite, nitrate, ammonia, nitrogen, phosphate,dissolved oxygen and PH ,it is positive correlation with temperature and silicate noctiluca and negatively correlation with transparency and salinity.

The Ammonia Nitrogen Removal Enhanced by Biological Aerobic Filter Packed with a Novel Lightweight Zeolite Particles

2013 ◽  
Vol 361-363 ◽  
pp. 764-767
Author(s):  
Hai Tang ◽  
Long Ouyang ◽  
Xiang Zhao
Keyword(s):  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Ammonia Nitrogen ◽  
Exponential Equation ◽  
N Concentration ◽  
N Removal ◽  
Optimal Value ◽  
Relationship Of ◽  
The Relationship

The ammonia nitrogen (NH4-N) removal enhanced by biological aerobic filter (BAF) packed with novel micro-mesoporous lightweight zeolite particles (LZP) as carrier. The results showed that the biofilm can quickly grow up using LZP as media in the BAF. HLR of 1.2 was chosen as the optimal value under the average influent NH4+-N concentration of 24.6 mg/L, percent NH4-N removal of 87% and NLR of 0.24 kgN/m3.d was achieved. The kinetic performance of the LZP-BAF indicated that the relationship of NH4-N removal efficiency with the L could be described by an exponential equation (Ce/Ci=exp (-1.24/L0.344)).

Tertiary treatment of municipal wastewater using bioflocculating micro-algae

1991 ◽  
Vol 18 (6) ◽  
pp. 940-944 ◽  
Author(s):  
J. B. Sérodes ◽  
E. Walsh ◽  
O. Goulet ◽  
J. de la Noue ◽  
C. Lescelleur
Keyword(s):  
Removal Efficiency ◽  
Municipal Wastewater ◽  
Removal Rate ◽  
Batch Reactor ◽  
Ammonia Nitrogen ◽  
Design Criteria ◽  
Tertiary Treatment ◽  
Deep Basin ◽  
Sequential Batch Reactor ◽  
N Removal

Design criteria of a pilot plant for treating secondary municipal effluents using filamentous, bioflocculating micro-algae were evaluated. Using a sequential batch reactor, the best removal rate of ammonia nitrogen was reached for 25% draw volume; at 20–22 °C, up to four cycles per day could be achieved giving a removal efficiency of approximately 2 g of N per day and per square meter of basin (200 mm deep) with negligible nitrogen residual; increasing the water level by increments of 200 mm (from 200 to 600 mm) increased the N removal efficiency in a way similar to an increase in the number of renewals per day on a 200 mm deep basin. The dominant micro-algae (Chlorhormidium) was heavily influenced by the water temperature. Key words: micro-algae, municipal wastewater, water treatment, ammonia nitrogen, removal rate, removal efficiency.

scholarly journals FLUENT Simulation Design and Optimization of Biological Aerated Filter

2022 ◽  
Vol 2148 (1) ◽  
pp. 012037
Author(s):  
Shuqin Wang ◽  
Zhiqiang Zhang ◽  
Ning Wang ◽  
Wenqi Zhao ◽  
Chungang Yuan
Keyword(s):  
Particle Size ◽  
Dissolved Oxygen ◽  
Removal Efficiency ◽  
Ammonia Nitrogen ◽  
Design Parameters ◽  
Biological Aerated Filter ◽  
Simulation Design ◽  
Initial Concentration ◽  
Design And Optimization ◽  
Aerated Filter

Abstract In this paper, a small biological aerated filter for experimental use was designed, and a method was explored to optimize the nitrogen removal efficiency by using FLUENT software to simulate the particle size of the filler, the amount of the filler, the initial concentration of ammonia nitrogen, dissolved oxygen and other operating parameters. Through the simulation experiment, the optimal design parameters of the particle size of filler, the amount of filler, the initial concentration of ammonia nitrogen and the dissolved oxygen of the biological aerated filter are 4mm, 60%, 15% and 1.5%, respectively, when the removal efficiency of ammonia nitrogen exceeds 30% reported in the literature. It provides a reference for the experimental research and practical application of biological aerated filter (BAF) denitrification.

scholarly journals Nitrogen-removal efficiency in an upflow partially packed biological aerated filter (BAF) without backwashing process

2011 ◽  
Vol 1 (1) ◽  
pp. 27-35 ◽  
Author(s):  
Pramanik Biplob ◽  
Suja Fatihah ◽  
Zain Shahrom ◽  
ElShafie Ahmed
Keyword(s):  
Dissolved Oxygen ◽  
Removal Efficiency ◽  
Hydraulic Retention Time ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Nitrogen Loading ◽  
Biological Aerated Filter ◽  
Biological Phenomena ◽  
Nitrification Process ◽  
Aerated Filter

An upflow, partially packed biological aerated filter (BAF) reactor was used to remove nitrogen in the form of ammonia ions by a nitrification process that involves physical, chemical and biological phenomena governed by a variety of parameters such as dissolved oxygen concentration, pH and alkalinity. Dissolved oxygen (DO) and pH were shown to have effects on the nitrification process in this study. Three C:N ratios i.e., 10, 4 and 1 were compared during this study by varying the nitrogen loading while the carbon loading was kept constant at 0.405 ± 0.015 kg chemical oxygen demand m−3 d−1. The removal efficiencies of ammonia linearly increase with a rise of the initial concentration of ammonia-nitrogen. The results of the 115 days' operation of the BAF system showed that its overall NH3-N performance was good, where a removal efficiency of 87.0 ± 2.9%, 89.2 ± 1.38% and 91.1 ± 0.7% and COD removal of 87.6 ± 2.9%, 86.4 ± 2.1% and 89.5 ± 2.6% were achieved for the C:N ratios of 10, 4 and 1, respectively on average, over 6 h hydraulic retention time (HRT). No clogging occurred throughout the period although backwashing was eliminated. It was concluded that the BAF system proposed in this study removed nitrogen by the nitrification process extremely well.

Effect on Bed Material Heights to the Performance of ZCBAF in the Treatment of Micro-Polluted Raw Water

2012 ◽  
Vol 209-211 ◽  
pp. 2053-2057
Author(s):  
Jin Xiang Liu ◽  
Shui Bo Xie ◽  
Chun Ning Cheng ◽  
Jin Sheng Lou ◽  
Shi You Li
Keyword(s):  
Removal Efficiency ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Test Results ◽  
Raw Water ◽  
Hydraulic Loading ◽  
N Removal ◽  
The Media ◽  
Aerated Filter ◽  
Bed Material

The effect of bed material heights on treatment performance of pollutants from micro-polluted raw Water was studied in zeolite - Ceramics biological aerated filter(ZCBAF) technology. The test results showed the removal rate of CODMn, NH4+-N and UV254 will improve with the increase of media height, most of CODMn and UV254 were removed within the first 440mm , when the media height over 440mm, the effect of increase height is inconspicuous removal, and ammonia-nitrogen removal has evident improvement during 220-440mm. At the media height of 20mm, 40mm and 60mm in ZCBAF respectively, the removal efficiency of CODMn is 18.05%，31.6% and 38.62% respectively, NH4+-N removal efficiency is 29.78%,81.28% and 93.02% respectively , and UV254 removal efficiency is 7.81%，10.11% and 11.26% respectively under the air/water ratio of 1:1 and the hydraulic loading of 1.2m3/(m2.h). Removal rate of CODMn was decreased with the increase of hydraulic loading, and removal effect of NH4+-N and UV254 had not big influence.

The Study of the Fluorescence In Situ Hybridization Applied in the Denitrifying Bacteria on Metal Membrane Bioreactor’s Denitrification Tank

2011 ◽  
Vol 317-319 ◽  
pp. 250-253
Author(s):  
Pan Zhang ◽  
Lei Chen
Keyword(s):  
Membrane Bioreactor ◽  
Removal Rate ◽  
Denitrifying Bacteria ◽  
Ammonia Nitrogen ◽  
Nitrifying Bacteria ◽  
Active Sludge ◽  
Metal Membrane ◽  
The Relationship ◽  
Plate Type

In order to study changes in the quantity of different denitrifying bacteria during the process of the metal membrane bioreactor, and to determine the relationship between different types of bacteria’s quantity and the treating water quality, the fluorescence in situ hybridization (FISH) dominant molecular biological technologies were used in this study to explore different denitrifying bacteria populations in the active sludge in the denitrification tank on the immersed plate-type metal membrane bioreactor. The study result implies that the addition involvement of the denitrification tank is enormous beneficial to the growth of all bacteria and nitrifying bacteria, meanwhile the removal rate of total nitrogen and ammonia nitrogen is improved as well.

Studies on the Performance of Biofilm-MBR

2014 ◽  
Vol 1030-1032 ◽  
pp. 396-399
Author(s):  
Wei Hong Jin ◽  
Cai Ling He ◽  
Feng Gao ◽  
Chen Li
Keyword(s):  
Removal Efficiency ◽  
Total Phosphorus ◽  
Membrane Fouling ◽  
Control Method ◽  
Removal Rate ◽  
Sewage Treatment ◽  
Ammonia Nitrogen ◽  
Treatment Performance ◽  
Biological Denitrification ◽  
Pollutants Removal

MBR technology for sewage treatment has the advantages of high volumetric load, good treatment performance and so on. But the MBR technology also has the shortage of membrane fouling. So this study selected the control method of fixing combination packing added in the MBR reactor, so as to reduce the membrane pollution, at the same time in the reactor to create the environment of coexistence of anaerobic and aerobic for biological denitrification. Through the research of the pollutants removal efficiency and the membrane pollution, it was founded that this method can remove 85-95% of COD and ammonia nitrogen. Effluent COD concentration generally is about 25mg/L, and the minimum of it is less than 10 mg/L. Effluent ammonia nitrogen is generally less than 10 mg/L. The minimum effluent concentration of ammonia nitrogen was less than 1 mg/L. The removal rate of total phosphorus was between 30-45%.

The Preparation and the Research of Copper-Chelex Chitosan for Removal Ammonia-Nitrogen from the Drinking Water

2010 ◽  
Vol 113-116 ◽  
pp. 1166-1169 ◽  
Author(s):  
Chun Ying Li ◽  
Wei Guang Li ◽  
Guang Zhi Wang ◽  
Ke Wang
Keyword(s):  
Drinking Water ◽  
Human Health ◽  
Removal Efficiency ◽  
Removal Rate ◽  
Copper Acetate ◽  
Ammonia Nitrogen ◽  
Water Inflow ◽  
Initial Concentration

In order to remove ammonia-nitrogen from drinking water and reduce its threat to human health, Copper-chelex chitosan that is to be the new ammonia-nitrogen remover was prepared by chelating chitosan with copper acetate. In this paper, we measure the effect of this remover with pH= 7.5, 8.5, 9.5 and the concentration of ammonia-nitrogen, such as 1.5mg/L,2.5mg/L,5mg/L,10mg/L and 100mg/L. From the result of this experiment, we draw a conclusion that the removal efficiency of ammonia-nitrogen is about 80% when the pH is greater than 7.5 and the water inflow concentration of ammonia-nitrogen is 100mg/L. as the initial concentration ammonia-nitrogen is increasing, the removal rate is improved regularly.

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