Application of membrane bioreactor technology for wastewater treatment and reuse in the Mediterranean region: Focusing on removal efficiency of non-conventional pollutants

2010 ◽  
Vol 91 (12) ◽  
pp. 2424-2431 ◽  
Author(s):  
David Bolzonella ◽  
Francesco Fatone ◽  
Silvia di Fabio ◽  
Franco Cecchi
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Mediterranean Region ◽  
Membrane Bioreactor ◽  
The Mediterranean

A submerged tubular ceramic membrane bioreactor for high strength wastewater treatment

2003 ◽  
Vol 47 (1) ◽  
pp. 105-111 ◽  
Author(s):  
D.D. Sun ◽  
J.L. Zeng ◽  
J.H. Tay
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Retention Time ◽  
Membrane Bioreactor ◽  
Ceramic Membrane ◽  
Treatment Plant ◽  
High Strength ◽  
Cod Removal ◽  
Utilization Rate ◽  
Cod Removal Efficiency

A 4 L submerged tubular ceramic membrane bioreactor (MBR) was applied in laboratory scale to treat 2,400 mg-COD/L high strength wastewater. A prolonged sludge retention time (SRT) of 200 day, in contrast to the conventional SRT of 5 to 15 days, was explored in this study, aiming to reduce substantially the amount of disposed sludge. The MBR system was operated for a period of 142 days in four runs, differentiated by specific oxygen utilization rate (SOUR) and hydraulic retention time (HRT). It was found that the MBR system produced more than 99% of suspended solid reduction. Mixed liquor suspended solids (MLSS) was found to be adversely proportional to HRT, and in general higher than the value from a conventional wastewater treatment plant. A chemical oxygen demand (COD) removal efficiency was achieved as high as 98% in Run 1, when SOUR was in the range of 100-200 mg-O/g-MLVSS/hr. Unexpectedly, the COD removal efficiency in Run 2 to 4 was higher than 92%, on average, where higher HRT and abnormally low SOUR of 20-30 mg-O/g-MLVSS/hr prevailed. It was noted that the ceramic membrane presented a significant soluble nutrient rejection when the microbial metabolism of biological treatment broke down.

Comparison of the behaviour of selected micropollutants in a membrane bioreactor and a conventional wastewater treatment plant

2004 ◽  
Vol 50 (5) ◽  
pp. 29-36 ◽  
Author(s):  
M. Clara ◽  
B. Strenn ◽  
M. Ausserleitner ◽  
N. Kreuzinger
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Removal Efficiency ◽  
Membrane Bioreactor ◽  
Endocrine Disrupting Chemicals ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Point Sources ◽  
Treated Wastewater ◽  
Treatment Technique

Micropollutants as pharmaceutical active compounds (PhACs), residuals of personal care products or endocrine disrupting chemicals are of increasing interest in water pollution control. In this context the removal efficiencies of sewage treatment plants (STPs) are of importance, as their effluents are important point sources for the release of those substances into the aquatic environment. Activated sludge based wastewater treatment is the worldwide prevalently used treatment technique. In conventional plants the separation of treated wastewater and sludge occurs via sedimentation. A new development is the application of membrane technology for this separation step. The studies focus on the influence of the solids retention time (SRT) on the removal efficiency, as the SRT is the most important parameter in the design of STPs. A conventional activated sludge plant (CASP) and a membrane bioreactor (MBR) were operated at different SRTs. The substances selected are the antiepileptic carbamazepine, the analgesics diclofenac and ibuprofen, the lipid regulator bezafibrate, the polycyclic musks tonalide and galaxolide and the contraceptive 17α-ethinylestradiole. No significant differences in the removal efficiency were detected. Due to the absence of suspended solids in the MBR effluent, substances with high adsorption potential could be retained to slightly higher amounts.

scholarly journals Effect of Different Influent Conditions on Biomass Production and Nutrient Removal by Aeration Microalgae Membrane Bioreactor (ICFB-MMBR) System for Mariculture Wastewater Treatment

Membranes ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 874
Author(s):  
Yi Ding ◽  
Shiyuan Wang ◽  
Hang Ma ◽  
Binyu Ma ◽  
Zhansheng Guo ◽  
...  
Keyword(s):  
Growth Rate ◽  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Biomass Production ◽  
Nutrient Removal ◽  
Membrane Bioreactor ◽  
Removal Rate ◽  
Pollutant Removal ◽  
Average Growth ◽  
Pollutant Removal Rate

The nutrient removal and biomass production of the internal circulating fluidized bed microalgae membrane bioreactor (ICFB-MMBR) was studied under different cultivation modes, influent TOC, influent pH, and influent N/P. Platymonas helgolandica tsingtaoensis was used as the biological source. The growth of P. helgolandica tsingtaoensis and the removal efficiency of pollutants in the mixotrophy culture mode were improved compared with other culture modes. With the increased influent TOC, the average growth rate of P. helgolandica tsingtaoensis increased, and ammonia nitrogen and total phosphorus removal rate were improved. The P. helgolandica tsingtaoensis growth rate and nutrient removal efficiencies at the influent pH of 8 were the best among the different influent pH values. As the influent N/P ratio increased from 5 to 20, the P. helgolandica tsingtaoensis growth rate and pollutant removal rate increased gradually. When the influent N/P ratio was higher than 20, the P. helgolandica tsingtaoensis growth rate and pollutant removal rate tended to be stable and did not significantly change with the increase of influent N/P ratio. At the proper influent conditions, the high P. helgolandica tsingtaoensis biomass and nutrient removal efficiency could be obtained in the microalgae membrane bioreactor, which could provide a theoretical basis for the application of the system for wastewater treatment.

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