Desalination of Mixed Tannery Effluent with Membrane Bioreactor and Reverse Osmosis Treatment

2005 ◽  
Vol 39 (21) ◽  
pp. 8505-8511 ◽  
Author(s):  
W. G. Scholz ◽  
P. RougÉ ◽  
A. BÓdalo ◽  
U. Leitz
Keyword(s):  
Reverse Osmosis ◽  
Membrane Bioreactor ◽  
Tannery Effluent

Reclaiming Municipal and Industrial Wastewater Using Combined Membrane Bioreactor and Reverse Osmosis

2009 ◽  
Vol 3 (1) ◽  
pp. 1-15
Author(s):  
Glen T. Daigger ◽  
Andrew Hodgkinson ◽  
David Evans
Keyword(s):  
Reverse Osmosis ◽  
Industrial Wastewater ◽  
Membrane Bioreactor

scholarly journals Recycling of Reverse Osmosis Concentrates to the Membrane Bioreactor in the MBR-RO Process for Water Reuse: effect on mbr performances

2017 ◽  
Vol 30 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Thi Thu Nga Vu ◽  
Manon Montaner ◽  
Christelle Guigui
Keyword(s):  
Organic Matter ◽  
Reverse Osmosis ◽  
Membrane Fouling ◽  
Water Reuse ◽  
High Performance ◽  
Membrane Bioreactor ◽  
Membrane System ◽  
Size Exclusion ◽  
Ro Concentrate ◽  
The Impact

Wastewater effluents can be treated by an integrated membrane system combining membrane bioreactor (MBR) and reverse osmosis (RO) for effective removal of micropollutants in the field of high-quality water reuse. However, discharging the RO concentrate waste stream directly into the natural environment could lead to serious problems due to the toxic components contained in the concentrates (micropollutants, salts, organic matter). A possible solution could be the recirculation of RO concentrate waste to the MBR. However, such an operation should be studied in detail since the recirculation of non-biodegradable organic matter or high concentrations of salts and micropollutants could directly or indirectly contribute to MBR membrane fouling and modification of the biodegradation activity. In this context, the work reported here focused on the recirculation of such concentrates in an MBR, paying specific attention to MBR membrane fouling. Lab-scale experiments were performed on a continuous MBR-RO treatment line with RO concentrate recirculation. The main goal was to determine the recovery of the RO unit and of the global process that maintained good process performance in terms of biodegradation and MBR fouling. The results demonstrate that the impact of the toxic flow on activated sludge depends on the recovery of the RO step but the same trends were observed regardless of the organic matter and salt contents of the concentrates: the concentration of proteins increased slightly. Size-exclusion high performance liquid chromatography (HPLC-SEC) was employed to study the effects of RO concentrate on the production of protein-like soluble microbial products (SMPs) and demonstrated a significant peak of protein-like substances corresponding to 10-100 kDa and 100-1 000 kDa molecules in the supernatant. Thus a significant increase in the propensity for sludge fouling was observed, which could be attributed to the increased quantity of protein-like substances. Finally, the effect of the concentrate on sludge activity was studied and no significant effect was observed on biodegradation, indicating that the return of the concentrate to the MBR could be a good alternative.

scholarly journals Tannery Effluent Treatment by Nanofiltration, Reverse Osmosis and Chitosan Modified Membranes

Membranes ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 378
Author(s):  
Asmaa Zakmout ◽  
Fatma Sadi ◽  
Carla A. M. Portugal ◽  
João G. Crespo ◽  
Svetlozar Velizarov
Keyword(s):  
Reverse Osmosis ◽  
Fourier Transforms ◽  
Divalent Cations ◽  
Appropriate Technology ◽  
Effluent Treatment ◽  
Polymeric Membrane ◽  
Tannery Effluent ◽  
Reflectance Ftir ◽  
Environmentally Sound ◽  
Water Pollutant

The objective of this work is to develop an appropriate technology for environmentally sound membrane-based purification of a tannery effluent assuring, simultaneously, the recovery of chromium, considered as the most hazardous inorganic water pollutant extensively used in leather tanning. A comparison between the permeate fluxes obtained during treatment of a synthetic tannery effluent through nanofiltration (NF270 and NF90 membranes) and reverse osmosis (BW30 and SW30) membranes was first performed. Then, a dedicated polymeric membrane was prepared by coating chitosan (cs) on a polyethersulfone (PES) microfiltration membrane (cs-PES MFO22) support. The resulting membrane was characterized by Fourier Transforms Infrared Spectroscopy Attenuated Total Reflectance (FTIR-ATR), Emission Scanning Electronic Microscopy (SEM) to confirm the process of surface modification and cross-linking of chitosan with glutaraldehyde. This membrane was found to be highly effective for chromium removal (>99%), which was more than eight times higher in reference to monovalent cations (e.g., Na+ and K+) and more than six times higher in reference to the divalent cations (Mg2+ and Ca2+) studied. The reverse osmosis permeate conforms to local Algerian regulations regarding being discharged directly into the natural environment (in this case, Reghaia Lake) or into urban sewers linked to wastewater biological treatment stations. While the SW30 membrane proved to be the most effective for purification of the tannery effluent, the chitosan modified membrane proved to be appropriate for recovery of chromium from the reverse osmosis concentrate.

Performance of nanofiltration and reverse osmosis after membrane bioreactor for urban source-separated urine treatment and water reuse

2017 ◽  
Vol 95 ◽  
pp. 18-33 ◽  
Author(s):  
Mathias Monnot ◽  
Bénédicte Nguyen ◽  
François Zaviska ◽  
Geoffroy Lesage ◽  
Marc Héran
Keyword(s):  
Reverse Osmosis ◽  
Water Reuse ◽  
Membrane Bioreactor ◽  
Urine Treatment

Advanced Water Treatment of Non-nitrified Secondary Effluent with Tertiary Membrane Bioreactor and Reverse Osmosis Processes

2013 ◽  
Vol 2013 (8) ◽  
pp. 6366-6376
Author(s):  
Robert Morton ◽  
Thomas Knapp ◽  
Nick Smal ◽  
Naoko Munakata ◽  
Chi-Chung Tang ◽  
...  
Keyword(s):  
Water Treatment ◽  
Reverse Osmosis ◽  
Membrane Bioreactor ◽  
Secondary Effluent

Assessing inorganic components of cake layer in A/O membrane bioreactor for physical-chemical treated tannery effluent

Chemosphere ◽  
2020 ◽  
Vol 250 ◽  
pp. 126220
Author(s):  
Lijie Zhou ◽  
Wenyu Zhang ◽  
Yashika G. De Costa ◽  
Wei-Qin Zhuang ◽  
Shan Yi
Keyword(s):  
Membrane Bioreactor ◽  
Tannery Effluent ◽  
Physical Chemical ◽  
Cake Layer ◽  
Inorganic Components
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