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

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

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.

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

Effect of dissolved oxygen conditions on nitrogen removal in continuously fed intermittent-aeration process with two tanks

2002 ◽  
Vol 45 (12) ◽  
pp. 181-188 ◽  
Author(s):  
T. Hidaka ◽  
H. Yamada ◽  
M. Kawamura ◽  
H. Tsuno
Keyword(s):  
Nitrogen Removal ◽  
Rural Areas ◽  
Aerobic Condition ◽  
Small Scale ◽  
Intermittent Aeration ◽  
Solids Retention ◽  
Oxygen Conditions ◽  
Control Set ◽  
Aeration Process ◽  
Biological Nitrogen

In this study, an intermittent aeration type activated sludge process that is fed continuously is evaluated for nitrogen and organic carbon for facilities in rural areas, which are characterized by small scale, low loading rate and automatic operation. Anoxic and aerobic conditions can be regulated alternatively by intermittent aeration for biological nitrogen removal. It is proved that an intermittent aeration cycle of 90 min, with aeration/anoxic mixing periods of 25~30 min/65~60 min in Tank 1, and 30~45 min/60~45 min in Tank 2, and a DO control set at 0.6~1 mg/L during the aeration period are required for satisfactory treatment performance. Under these conditions, a stable effluent water quality with BOD ≤ 5 mg/L, CODMn ≤ 8 mg/L, Nitrogen ≤ 3 mgN/L, SS ≤ 5 mg/L and transparency ≥ 80 cm can be achieved. The solids retention time in aerobic condition was 10~25 d, which is sufficient for nitrification.

Enhanced nitrogen removal and energy saving of intermittent aeration-modified oxidation ditch process

2013 ◽  
Vol 52 (25-27) ◽  
pp. 4895-4903 ◽  
Author(s):  
Bo-Lin Li ◽  
Zhi Zhang ◽  
Ye Li ◽  
Meng-Ting Song ◽  
Chi Zhang
Keyword(s):  
Energy Saving ◽  
Nitrogen Removal ◽  
Oxidation Ditch ◽  
Intermittent Aeration

scholarly journals Comprehensive assessment of system performance in a full-scale wastewater treatment plant with an anaerobic/anoxic/aerobic membrane bioreactor combined with the ozonation process

2018 ◽  
Vol 78 (3) ◽  
pp. 690-698
Author(s):  
Dan Wang ◽  
Yihui Wu ◽  
Fang Guo ◽  
Zhiping Li ◽  
Guangxue Wu
Keyword(s):  
Environmental Impact ◽  
Nitrogen Removal ◽  
System Performance ◽  
Membrane Bioreactor ◽  
Linear Regression Analysis ◽  
Oxygen Demand ◽  
Economic Cost ◽  
Full Scale ◽  
Electricity Cost ◽  
Ozonation Process

Abstract The system performance, economic cost and environmental impact of a full-scale anaerobic/anoxic/aerobic/membrane bioreactor (3AMBR) combined with the ozonation process were evaluated. The 3AMBR/ozonation process removed biochemical oxygen demand (BOD), chemical oxygen demand (COD), suspended solids, NH4-N and total phosphorus efficiently, with removal percentages above 94%, while the total nitrogen removal percentage was only 70%. The multiple linear regression analysis showed that hydraulic retention time (HRT) had a significant effect on nitrogen removal. A low HRT benefited nitrogen removal. Ferrous sulfate dosage close to the optimal value and a high mixed liquid suspended solid could enhance the phosphorus removal. The electricity cost accounted for 88% of the total economic costs. Greenhouse gas (GHG) emissions from the BOD oxidation and endogenous decay accounted for more than 50% of total emissions. The second largest GHG emission source was electricity consumption, accounting for 41%. The key to reduce the eutrophication was to enhance nitrogen removal. The composite cost of the 3AMBR/ozonation process was 251 CNY/t CODeq removed, among which economic cost accounted for 82.5%, while environmental impact cost accounted for a small proportion.

Sign in / Sign up

Export Citation Format

Share Document