Direct and indirect effects of membrane pore size on fouling development in a submerged membrane bioreactor with a symmetric chlorinated poly (vinyl chloride) flat-sheet membrane

2021 ◽  
pp. 107023
Author(s):  
Toshio Sano ◽  
Yasunori Kawagoshi ◽  
Ituki Kokubo ◽  
Hiroaki Ito ◽  
Kei Ishida ◽  
...  
Keyword(s):  
Indirect Effects ◽  
Membrane Bioreactor ◽  
Direct And Indirect Effects ◽  
Membrane Pore ◽  
Submerged Membrane Bioreactor ◽  
Poly Vinyl Chloride ◽  
Flat Sheet ◽  
Flat Sheet Membrane ◽  
Membrane Pore Size ◽  
Sheet Membrane

Impact of chemical cleaning and air-sparging on the critical and sustainable flux in a flat sheet membrane bioreactor for municipal wastewater treatment

2008 ◽  
Vol 57 (12) ◽  
pp. 1873-1879 ◽  
Author(s):  
G. Guglielmi ◽  
D. Chiarani ◽  
D. P. Saroj ◽  
G. Andreottola
Keyword(s):  
Membrane Bioreactor ◽  
Municipal Wastewater ◽  
Membrane Surface ◽  
Municipal Wastewater Treatment ◽  
Chemical Cleaning ◽  
Critical Flux ◽  
Submerged Membrane Bioreactor ◽  
Flat Sheet ◽  
Exponential Trend ◽  
Flat Sheet Membrane

The paper discusses the experimental optimisation of both chemical and mechanical cleaning procedures for a flat-sheet submerged membrane bioreactor fed with municipal wastewater. Fouling was evaluated by means of the critical flux concept, which was experimentally measured by short-term flux-stepping tests. By keeping constant most important parameters of the biological process (MLSS, sludge age), two different chemical cleaning protocols (2,000 mg L−1 NaOCl and 200 mg L−1 NaOCl) were applied with different frequency and, after approximately 9 months of operation, the criticality threshold was determined under different values of SADm (specific aeration demand per unit of membrane surface area). The weaker and more frequent chemical cleaning regime (200 mg L−1, monthly) proved much more effective than the stronger and less frequent strategy (2,000 mg L−1, once every three months). The improvement of performances was quantified by two TMP-based parameters, the fouling rate and the ΔTMP (difference between TMP values during the increasing and decreasing phase of hysteresis). The best performing configuration was then checked over a longer period by running four long-term trials showing an exponential trend of the sub-critical fouling rate with the imposed flux.

A new flat sheet membrane bioreactor hybrid system for advanced treatment of effluent, reverse osmosis pretreatment and fouling mitigation

2015 ◽  
Vol 192 ◽  
pp. 177-184 ◽  
Author(s):  
Majid Hosseinzadeh ◽  
Gholamreza Nabi Bidhendi ◽  
Ali Torabian ◽  
Naser Mehrdadi ◽  
Mehdi Pourabdullah
Keyword(s):  
Reverse Osmosis ◽  
Hybrid System ◽  
Membrane Bioreactor ◽  
Advanced Treatment ◽  
Flat Sheet ◽  
Fouling Mitigation ◽  
Flat Sheet Membrane ◽  
Sheet Membrane
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