Rapid reformation of larger aerobic granular sludge in an internal-circulation membrane bioreactor after long-term operation: Effect of short-time aeration

2019 ◽  
Vol 273 ◽  
pp. 462-467 ◽  
Author(s):  
Guangpeng Chen ◽  
Liying Bin ◽  
Bing Tang ◽  
Shaosong Huang ◽  
Ping Li ◽  
...  
Keyword(s):  
Membrane Bioreactor ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Internal Circulation ◽  
Term Operation ◽  
Short Time

scholarly journals Reactor performance and membrane fouling of a novel submerged aerobic granular sludge membrane bioreactor during long-term operation

2017 ◽  
Vol 9 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Jianfeng Li ◽  
Yanjun Liu ◽  
Xiaoning Li ◽  
Fangqin Cheng
Keyword(s):  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Sewage Treatment ◽  
Granular Sludge ◽  
Synthetic Wastewater ◽  
Aerobic Granular Sludge ◽  
Municipal Sewage ◽  
Reactor Performance ◽  
Term Operation

Abstract The aerobic granular sludge membrane bioreactor (AGS-MBR) has the potential for simultaneous carbon/nitrogen removal and membrane fouling mitigation. Most studies have focused on comparison of granular sludge MBR and flocculent sludge MBR in short-term tests using synthetic wastewater. In this study, two identical AGS-MBRs were developed, and the reactor performance and membrane fouling were examined systemically over 120 days for synthetic wastewater and municipal sewage treatment, respectively. Results showed that regular granules with good settling ability were developed and maintained throughout the experimental period. Regardless of the substrate type, AGS-MBR demonstrated a stable removal of carbon (85–95%) and nitrogen (50–55%) in long-term operation. In addition, the membrane fouling propensity is apparently lower in AGS-MBRs with no membrane cleaning for 4 months at a flux of 20 L m−2h−1. The filtration resistance analysis indicates that the main membrane resistance was caused by irreversible fouling in both of the reactors. Membrane foulant analysis indicates that proteins in extracellular polymeric substances are more prone to be attached by the membrane of AGS-MBRs because of their hydrophobic nature. This study shows that AGS-MBR is effective and stable for municipal sewage treatment and reuse during long-term operation.

scholarly journals Bacterial community dynamics in long-term operation of a pilot plant using aerobic granular sludge to treat pig slurry

2016 ◽  
Vol 32 (5) ◽  
pp. 1212-1221 ◽  
Author(s):  
A. Fra-Vázquez ◽  
N. Morales ◽  
M. Figueroa ◽  
A. Val del Río ◽  
L. Regueiro ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Pilot Plant ◽  
Community Dynamics ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Pig Slurry ◽  
Term Operation ◽  
Bacterial Community Dynamics

Investigation of long-term operation and biomass activity in a membrane bioreactor system

2011 ◽  
Vol 63 (9) ◽  
pp. 1906-1912 ◽  
Author(s):  
Simos Malamis ◽  
Andreas Andreadakis ◽  
Daniel Mamais ◽  
Constantinos Noutsopoulos
Keyword(s):  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Extracellular Polymeric Substances ◽  
Operating Conditions ◽  
Term Operation ◽  
Solids Retention ◽  
Biomass Activity ◽  
Long Term Performance ◽  
Term Performance

The aim of this work was to evaluate the long-term performance of a Membrane Bioreactor (MBR) that operated continuously for 2.5 years and to assess membrane fouling and biomass activity under various operating conditions. Furthermore, a method for the characterisation of influent wastewater was developed based on its separation into various fractions. The MBR system operated at the solids retention times (SRT) of 10, 15, 20 and 33 days. The increase of SRT resulted in a decrease of the fouling rate associated with the reduction of extracellular polymeric substances. Moreover, the SRT increase resulted in a significant reduction of the Oxygen Uptake Rate (OUR) due to the lower availability of substrate and in a notable decrease of the maximum OUR since high SRT allowed the development of slower growing microorganisms. Biomass consisted of small flocs due to extensive deflocculation caused by intense aeration. Finally, the method developed for wastewater characterisation is straightforward and less time consuming than the usual method that is employed.

scholarly journals Effect of applied voltage on membrane fouling in the amplifying anaerobic electrochemical membrane bioreactor for long-term operation

RSC Advances ◽  
2021 ◽  
Vol 11 (50) ◽  
pp. 31364-31372
Author(s):  
Mengjing Cao ◽  
Yongxiang Zhang ◽  
Yan Zhang
Keyword(s):  
Chemical Oxygen Demand ◽  
Applied Voltage ◽  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Glucose Solution ◽  
Oxygen Demand ◽  
Term Operation ◽  
Long Time

A novel and amplifying anaerobic electrochemical membrane bioreactor was constructed and operated for a long time (204 days) with synthetic glucose solution having an average chemical oxygen demand (COD) of 315 mg L−1, at different applied voltages and room temperatures.

Long-term aerobic granular sludge stability through anaerobic slow feeding, fixed feast-famine period ratio, and fixed SRT

2020 ◽  
Vol 8 (2) ◽  
pp. 103681 ◽  
Author(s):  
Oliver Terna Iorhemen ◽  
Mohamed Sherif Zaghloul ◽  
Rania Ahmed Hamza ◽  
Joo Hwa Tay
Keyword(s):  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Period Ratio
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