Performance of a pilot scale membrane bioreactor coupled with SBR (SM-SBR) - experiences in seasonal temperature changes

2004 ◽  
Vol 4 (1) ◽  
pp. 135-142 ◽  
Author(s):  
H. Shin ◽  
S. Kang ◽  
C. Lee ◽  
J. Lim
Keyword(s):  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Batch Reactor ◽  
Domestic Wastewater ◽  
Pilot Scale ◽  
Endogenous Respiration ◽  
Seasonal Temperature ◽  
Nitrogen And Phosphorus ◽  
Submerged Membrane Bioreactor ◽  
Aeration Time

The submerged membrane bioreactor is one of the recent technologies for domestic wastewater treatment. In this study, the performance of the pilot-scale submerged membrane bioreactor coupled with sequencing batch reactor (SM-SBR) was investigated. The reactor was operated in sequencing batch modes with a 3-hour cycles consisting of anoxic and aerobic conditions to treat organics, nitrogen and phosphorus. Despite large fluctuations in influent conditions, COD removal was found to be higher than 95%. Sufficient nitrification was obtained within a few weeks after start-up and during the stable period. Moreover, complete nitrification occurred despite of short aeration time. Total nitrogen (TN) removal efficiency was up to 85%. The insufficient organic loading caused by the membrane fouling led to the increase of HRT, leading to endogenous respiration and/or deactivation of nitrifying microorganisms. DGGE patterns confirmed the shift in microbial community structure. The ammonia-oxidizers (i.e. Nitrospira) became dominant in the mixed liquor during long-term operations. Nitrification and denitrification processes were greatly affected by the temperature, while organic removal and phosphorus removal efficiencies were relatively stable below 15°C.

Performance and membrane fouling in a pilot scale SBR process coupled with membrane

2003 ◽  
Vol 47 (1) ◽  
pp. 139-144 ◽  
Author(s):  
H. Shin ◽  
S. Kang
Keyword(s):  
Membrane Fouling ◽  
Batch Reactor ◽  
Pilot Scale ◽  
Nitrifying Bacteria ◽  
Endogenous Respiration ◽  
Aeration Time ◽  
Membrane Flux ◽  
Start Up ◽  
Cell Test ◽  
Stirred Cell

The performance of the pilot-scale submerged membrane coupled with sequencing batch reactor (SM-SBR) for upgrading effluent quality was investigated in this study. The reactor was operated with 3-hour cycle with alternating anoxic and aerobic conditions to treat organics, nitrogen and phosphate. Despite various influent characteristics, COD removal was always higher than 95%. Sufficient nitrification was obtained within a few weeks after start-up and during the stable period, complete nitrification occurred despite short aeration time. Total nitrogen (TN) removal efficiency was reached up to 85%. Membrane flux was critical for TN removal so that the decrease of flux by membrane fouling led to increase of HRT, and it caused the endogenous respiration of microorganisms such as nitrifying bacteria. The stirred cell test revealed the significant role of the soluble fraction in membrane permeability and dissolved solids played a major role in the short-term fouling mechanism. The cake resistance by the soluble COD fraction of supernatant or soluble microbial products (SMP) was investigated as a major part of total resistance.

scholarly journals Enhanced Removal of Organic Pollutants and Reactive Dye in Polyethersulfone Submerged Membrane Bioreactor (PES-SMBR) for Textile Wastewater

2021 ◽  
Vol 16 (1) ◽  
pp. 329-341
Author(s):  
Tukaram P. Chavan ◽  
Ganpat B. More ◽  
Sanjaykumar R. Thorat
Keyword(s):  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Textile Wastewater ◽  
Pilot Scale ◽  
Reactive Dye ◽  
Hollow Fibre ◽  
Flow Mode ◽  
Permeate Flux ◽  
Chemical Cleaning ◽  
Submerged Membrane Bioreactor

The present investigation was carried out to assess the operation of a pilot-scale submerged membrane bioreactor (SMBR) for the treatment of reactive dye and textile wastewater. The operation of SMBR model was conducted by using a polyethersulfone (PES) hollow fibre membrane with continuous flow mode at different HRTs at 8, 6 and 4 h, for 90 days. During the entire operation, the average permeate flux, TMP, F/M ratio and OLR was found to be 19 (L/m²/h), 2.6 (psi), 0.10 (g BOD/(g MLSS•d) and 0.89 (kg BOD/m³.d), respectively. The variations in the permeate flux, TMP, F/M ratio and OLR have not adversely effects on the operation of the SMBR model. Throughout the entire operation, despite the TP, TDS and conductivity, the high amount of COD (82%), BOD (86%), NO3-N (79%), TSS (98%), turbidity (97%) and colour (79%), removal was achieved. The permeate flux was declined by membrane fouling and it was recovered by chemical cleaning as well as regular backwashing during the entire operation. The results obtained from the study concluded that the hollow fibre ultrafiltration polyethersulfone (PES) membrane shows good performance while treating textile wastewater along with reactive dye solution.

Biological Nutrient Removal and EPS Performance in Aerobic-MBR and SBR-MBR Systems

2013 ◽  
Vol 699 ◽  
pp. 291-297
Author(s):  
Xiao Nan Feng ◽  
Tao Tao ◽  
Hao Xi ◽  
Yong Tao Xu ◽  
Hong Feng Wang ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Biological Nutrient Removal ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Submerged Membrane Bioreactor ◽  
Conventional Activated Sludge ◽  
Initial Membrane ◽  
Tracer Experiments ◽  
Sludge Activity

.Membrane bioreactor (MBR) is considered to be a promising technology for combine biological with filtration and many advantages over conventional activated sludge (CAS) processes. In this study, the submerged membrane bioreactor which was explored by our research group and JDL Environmental Protection Ltd. at condition of aerobic-MBR and SBR-MBR were investigated. Hydraulic characteristics of MBR by the tracer experiments showed the total dead space (Vd, %) in the MBR was 3.2%. Compared with aerobic-MBR situation, the SBR-MBR exhibited better performance of average NH4+-N, total nitrogen, and phosphorus removal efficiency 90%, 86%, 57% respectively. The content of protein was correlated to sludge activity and organic matter. The initial membrane fouling was caused by layer pollution and subsequently the extra-cellular polymeric substances (EPS) contributed.

Microbial community structure of membrane fouling film in an intermittently and continuously aerated submerged membrane bioreactor treating domestic wastewater

2004 ◽  
Vol 49 (2) ◽  
pp. 255-261 ◽  
Author(s):  
B.-R. Lim ◽  
K.-H. Ahn ◽  
P. Songprasert ◽  
J.W. Cho ◽  
S.H. Lee
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Domestic Wastewater ◽  
Experimental Results ◽  
Submerged Membrane Bioreactor ◽  
Membrane Biofouling ◽  
Nocardia Sp

There was an observable difference in microbial community structure between suspended microorganisms and membrane biofouling film in intermittently and continuously aerated SMBRs. The dominant quinone type of membrane biofouling film in an intermittently aerated SMBR was ubiquinone (UQs)-8, -10 followed by menaquinone (MKs)-8(H4) and -8(H2). But that of the continuously aerated SMBR was UQs-10, -8 followed by MKs-6 and -8(H4). The experimental results also showed that the conditions of an intermittently aerated SMBR may contribute to biofouling by Pseudomonas, Moraxella, Vibrio (quinone type UQ-8), Staphylococcus warneri (quinone type MK-7), Micrococcus sp. (quinone type MK-8(H2)) and Nocardia sp. (quinone type MK-8(H4)), but biofouling in a continuously aerated SMBR may be due to Paracoccus sp. (quinone type: UQ-10) and Flavobacterium species (quinone type: MK-6). The microbial diversities in the intermittently aerated SMBR were 10.9 and 9.4 for biofouling film and suspended microorganisms, respectively. For the continuously aerated SMBR, the results were 10.4 and 10.5 for biofouling film and suspended microorganisms, respectively.

Membrane fouling in a pilot-scale submerged membrane bioreactor operated under various conditions

Desalination ◽  
2008 ◽  
Vol 231 (1-3) ◽  
pp. 124-132 ◽  
Author(s):  
N.O. Yigit ◽  
I. Harman ◽  
G. Civelekoglu ◽  
H. Koseoglu ◽  
N. Cicek ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Pilot Scale ◽  
Submerged Membrane Bioreactor

scholarly journals Influence of relaxation modes on membrane fouling in submerged membrane bioreactor for domestic wastewater treatment

Chemosphere ◽  
2017 ◽  
Vol 181 ◽  
pp. 19-25 ◽  
Author(s):  
Rasikh Habib ◽  
Muhammad Bilal Asif ◽  
Sidra Iftekhar ◽  
Zahiruddin Khan ◽  
Khum Gurung ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Domestic Wastewater ◽  
Submerged Membrane Bioreactor ◽  
Domestic Wastewater Treatment ◽  
Relaxation Modes

Potential and limitations of alum or zeolite addition to improve the performance of a submerged membrane bioreactor

2001 ◽  
Vol 43 (11) ◽  
pp. 59-66 ◽  
Author(s):  
J. C. Lee ◽  
J. S. Kim ◽  
I. J. Kang ◽  
M. H. Cho ◽  
P. K. Park ◽  
...  
Keyword(s):  
Membrane Permeability ◽  
Membrane Fouling ◽  
Natural Zeolite ◽  
Membrane Bioreactor ◽  
Chemical Precipitation ◽  
Exchange Capacity ◽  
Zeolite Membrane ◽  
Nitrogen And Phosphorus ◽  
Ion Exchange Capacity ◽  
Submerged Membrane Bioreactor

In this study, alum and natural zeolite were added to a submerged membrane bioreactor (MBR) not only to reduce membrane fouling but also to increase the removal of nitrogen and phosphorus. Alum addition reduced significantly the rising rate of suction pressure and also resulted in stable and better COD removal. Although phosphorus removal was more than 90% by chemical precipitation, nitrification inhibition was observed. With the addition of natural zeolite, membrane permeability was greatly enhanced by the formation of rigid floc that had lower specific resistance than that of the control activated sludge floc. In particular, the nitrification efficiency was over 95% even at N-shock loading due to the ion-exchange capacity of zeolite. The mechanisms for improved membrane permeability through alum or zeolite addition were discussed in detail.

Analysis of extracellular polymeric substance (EPS) release in anaerobic sludge holding tank and its effects on membrane fouling in a membrane bioreactor (MBR)

2014 ◽  
Vol 70 (1) ◽  
pp. 82-88 ◽  
Author(s):  
Byeong-Cheol Kim ◽  
Duck-Hyun Nam ◽  
Ji-Hun Na ◽  
Ki-Hoon Kang
Keyword(s):  
Membrane Fouling ◽  
Extracellular Polymeric Substance ◽  
Membrane Bioreactor ◽  
Batch Reactor ◽  
Pilot Scale ◽  
Anaerobic Sludge ◽  
Sudden Increase ◽  
Sludge Reduction ◽  
Successful Operation ◽  
Polymeric Substance

Amongst sludge reduction strategies, the anaerobic side-stream sludge holding tank (SHT) is of particular interest because it has shown significant sludge reduction efficiency. However, due to the anaerobic and starving environment of the SHT, the release of extracellular polymeric substance (EPS) may be stimulated, and it may hamper the application of the SHT to the membrane bioreactor. In order to investigate the effect of sludge storage on EPS release, sludge samples from a pilot-scale sequencing batch reactor coupled with SHT was incubated in a series of bench-scale SHT reactors for different periods of time (0–24 h). The increase in EPS was not significant until 12 h of incubation (9.3%), while 40.9% of the increase was observed in the sample incubated for 24 h. The rapid increase in EPS concentration after 12 h indicates a greater rate of cell lysis than that with EPS consumption as substrate. Since inducing the initial stage of the endogenous phase within microorganisms is a key factor for the successful operation of the SHT for sludge reduction, the retention time for the SHT should be shorter than the time for the sudden increase in EPS release.

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