scholarly journals Nitrogen Removal of Membrane Bioreactor System Having Two Intermittent Aeration Tanks.

2001 ◽  
Vol 24 (6) ◽  
pp. 398-403 ◽  
Author(s):  
Katsushi URYU ◽  
Takamasa TSUJI ◽  
Yoshinori TAKEZAKI ◽  
Yasutoshi SHIMIZU
Keyword(s):  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Intermittent Aeration ◽  
Bioreactor System

Enhancement of Nitrogen Removal in an Intermittent Aeration Membrane Bioreactor

2010 ◽  
Author(s):  
Xiaojuan He ◽  
Christelle Wisniewski ◽  
Xudong Li ◽  
Qi Zhou ◽  
Fangming Jin ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Intermittent Aeration

Study on Nitrogen Removal Efficiency of Hybrid Anoxic/Aerobic Membrane Bioreactor

2012 ◽  
Vol 178-181 ◽  
pp. 516-519
Author(s):  
Bai Ge Su ◽  
Zhi Qiang Liu ◽  
Xiao Jing Li ◽  
Xue Xu ◽  
Lei Gao
Keyword(s):  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Hybrid Membrane ◽  
Filling Ratio ◽  
Experimental Results ◽  
Aeration Intensity ◽  
System A ◽  
Bioreactor System ◽  
Main Influence

Based on fillers theory and traditional A/O-MBR theory, anoxic/aerobic hybrid membrane bioreactor system (A/O-HMBR for short) was modified by adding suspended biological fillers in one of the aerobic tanks of the traditional A/O-MBR, in which the filling ratio of fillers was 8%. The thesis mainly studies the nitrogen removal effect in the A/O-HMBR system when the main influence parameters, such as influent C/N(5,7,10), aeration intensity(15m3/h,20m3/h,25m3/h) and HRT(5h,8h,11h), were changed.The experimental results show that when HRT was 8h, C/N was 7, and aeration intensity was 20m3/h, TN removal effect was best.

scholarly journals Nitrogen Removal Using a Membrane Bioreactor with Rubber Particles as the Fouling Reducer

2021 ◽  
Vol 11 (8) ◽  
pp. 3578
Author(s):  
Moon-Su Choi ◽  
Yuhoon Hwang ◽  
Tae-Jin Lee
Keyword(s):  
Activated Carbon ◽  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Transmembrane Pressure ◽  
Intermittent Aeration ◽  
Initial Reduction ◽  
Rubber Particles ◽  
Nitrification Process ◽  
Removal Efficiencies ◽  
Denitrification Process

The use of granule activated carbon (GAC) and rubber particles as the bio-fouling reducer in a membrane bioreactor (MBR) was evaluated in this study. The addition of GAC tends to temporarily reduce Transmembrane Pressure (TMP). Then, after the initial reduction, TMP gradually increased back up to 0.7 bar, indicating significant fouling on the membrane. Low TMP values were observed after adding 0.5% (V/V) rubber particles to the same MBR. The organic compound and nitrogen removal efficiencies of the MBR under intermittent aeration were over 94% and 93.3%, respectively. The results showed that Dysgonomonas, Acidobacteria, and Pantoea sp. contributed to the nitrification process while Lactobacillus, Erythrobacter, Phytobacter, and Mycobacterium contributed to the denitrification process.

scholarly journals Nitrogen Removal by Sulfur-Based Carriers in a Membrane Bioreactor (MBR)

Membranes ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 115 ◽  
Author(s):  
Thi-Kim-Quyen Vo ◽  
Jeong-Jun Lee ◽  
Joon-Seok Kang ◽  
Seogyeong Park ◽  
Han-Seung Kim
Keyword(s):  
Removal Efficiency ◽  
Total Phosphorus ◽  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Oxygen Demand ◽  
Autotrophic Denitrification ◽  
Nitrogen Gas ◽  
Sulfate Ions ◽  
Major Disadvantage ◽  
Bioreactor System

Sulfur-based carriers were examined to enhance the nitrogen removal efficiency in a mixed anoxic–anaerobic-membrane bioreactor system, in which sulfur from the carrier acts as an electron donor for the conversion of nitrate to nitrogen gas through the autotrophic denitrification process. A total nitrogen removal efficiency of 63% was observed in the system with carriers, which showed an increase in the removal efficiency of around 20%, compared to the system without carriers. The results also indicated that the carriers had no adverse effect on biological treatment for the organic matter and total phosphorus. The removal efficiencies for chemical oxygen demand (COD) and total phosphorus (TP) were 98% and 37% in both systems, respectively. The generation of sulfate ions was a major disadvantage of using sulfur-based carriers, and resulted in pH drop. The ratio of sulfate in the effluent to nitrate removed in the system ranged from 0.86 to 1.97 mgSO42−/mgNO3−-N, which was lower than the theoretical value and could be regarded as due to the occurrence of simultaneous heterotrophic and autotrophic denitrification.

Evaluation of simultaneous organic matter and nitrogen removal in a novel anaerobic/anoxic/oxic membrane bioreactor system for treatment of synthetic paper-recycling wastewater

2020 ◽  
Vol 189 ◽  
pp. 66-73
Author(s):  
Ali Izadi ◽  
Morteza Hosseini ◽  
Ghasem Najafpour Darzi ◽  
Gholamreza Nabi Bidhendi ◽  
Farshid Pajoum Shariati
Keyword(s):  
Organic Matter ◽  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Paper Recycling ◽  
Bioreactor System

Nitrogen Removal in a Real-Time Controlled Sequencing Batch Membrane Bioreactor

2010 ◽  
Vol 5 (3) ◽  
Author(s):  
Cheng-Nan Chang ◽  
Li-Ling Lee ◽  
Han-Hsien Huang ◽  
Ying-Chih Chiu
Keyword(s):  
Real Time ◽  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Synthetic Wastewater ◽  
Real Time Control ◽  
Time Control ◽  
Cake Layer ◽  
On Line ◽  
Solid Liquid ◽  
Solid Liquid Separation

The performance of a real-time controlled Sequencing Batch Membrane Bioreactor (SBMBR) for removing organic matter and nitrogen from synthetic wastewater has been investigated in this study under two specific ammonia loadings of 0.0086 and 0.0045g NH4+-N gVSS−1 day−1. Laboratory results indicate that both COD and DOC removal are greater than 97.5% (w/w) but the major benefit of using membrane for solid-liquid separation is that the effluent can be decanted through the membrane while aeration is continued during the draw stage. With a continued aeration, the sludge cake layer is prevented from forming thus alleviating the membrane clogging problem in addition to significant nitrification activities observed in the draw stage. With adequate aeration in the oxic stage, the nitrogen removal efficiency exceeding 99% can be achieved with the SBMBR system. Furthermore, the SBMBR system has also been used to study the occurrence of ammonia valley and nitrate knee that can be used for real-time control of the biological process. Under appropriate ammonia loading rates, applicable ammonia valley and nitrate knee are detected. The real-time control of the SBMBR can be performed based on on-line ORP and pH measurements.

Nitrogen removal in a moving bed membrane bioreactor for municipal sewage treatment: Community differentiation in attached biofilm and suspended biomass

2015 ◽  
Vol 277 ◽  
pp. 209-218 ◽  
Author(s):  
P. Reboleiro-Rivas ◽  
J. Martín-Pascual ◽  
B. Juárez-Jiménez ◽  
J.M. Poyatos ◽  
R. Vílchez-Vargas ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Sewage Treatment ◽  
Municipal Sewage ◽  
Moving Bed ◽  
Suspended Biomass
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