Foam‐less fermentation for biosurfactant synthesis via advanced membrane aeration

2020 ◽  
Vol 92 (9) ◽  
pp. 1204-1204
Author(s):  
P. Bongartz ◽  
I. Bator ◽  
L. Blank ◽  
M. Wessling
Keyword(s):  
Membrane Aeration

Comparison of the efficiency of large-scale ceramic and membrane aeration systems with the dynamic off-gas method

2002 ◽  
Vol 46 (4-5) ◽  
pp. 317-324 ◽  
Author(s):  
J.A. Libra ◽  
A. Schuchardt ◽  
C. Sahlmann ◽  
J. Handschag ◽  
U. Wiesmann ◽  
...  
Keyword(s):  
Large Scale ◽  
Operating Conditions ◽  
Air Distribution ◽  
Energy Costs ◽  
Dissolved Oxygen Concentration ◽  
Membrane Aeration ◽  
Aeration System ◽  
Oxygen Transfer Efficiency ◽  
Aeration Efficiency ◽  
Period Measurement

The aeration systems of two full-scale activated sludge basins were compared over 2.5 years under the same operating conditions using dynamic off-gas testing. Only the material of the diffuser was different, membrane vs. ceramic tube diffusers. The experimental design took the complexity and dynamics of the system into consideration. The investigation has shown that, although the membrane diffusers have higher initial standard oxygen transfer efficiency (SOTE) and standard aeration efficiency (SAE), these decreased over time, while the SAE of the ceramic diffusers started lower, but increased slightly over the whole period. Measurement of air distribution in the basins along with dissolved oxygen concentration profiles have provided important information on improving process control and reducing energy costs. The results show that dynamic off-gas testing can effectively be used for monitoring the aeration system and to check design assumptions under operating conditions. The information can be used to improve the design of new aeration systems or in retro-fitting existing basins.

Use of transverse flow hollow fibers for bubbleless membrane aeration

1996 ◽  
Vol 30 (2) ◽  
pp. 440-446 ◽  
Author(s):  
Tariq Ahmed ◽  
Michael J. Semmens
Keyword(s):  
Transverse Flow ◽  
Hollow Fibers ◽  
Membrane Aeration

Trinitrophenol treatment in a hollow fiber membrane biofilm reactor

2000 ◽  
Vol 41 (4-5) ◽  
pp. 235-238 ◽  
Author(s):  
S.J. Grimberg ◽  
M.J. Rury ◽  
K.M. Jimenez ◽  
A.K. Zander
Keyword(s):  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Biofilm Reactor ◽  
Pure Oxygen ◽  
Outer Diameter ◽  
Packing Factor ◽  
Membrane Biofilm Reactor ◽  
Membrane Aeration ◽  
Novel Approach ◽  
Fiber Spacing

Treatment of recalcitrant wastewaters in traditional suspended growth systems is ineffective due to the required large contact times and large aeration basins. Hollow-fiber gas permeable membranes are being investigated as a novel approach to overcome oxygen and 2,4,6-trinitrophenol (TNP) mass transfer limitations of conventional fixed film systems. Three independent hollow fiber biofilm reactors using bubbleless membrane aeration technology were used to treat TNP. The reactors contained 14, 30, or 57 fibers, with a fiber spacing of 3, 2.7, or 2.1 mm, respectively, which resulted in a packing factor of 0.5%, 1% and 2%. A pure culture of Nocardioides simplex (strain Nb), which has been shown to mineralize TNP, was immobilized on the surface of 281.5 (m outer diameter microporous fibers. Pure oxygen was supplied through the lumen of the fibers and diffused throughout the biofilm and into the reactor. Removal of TNP in the 14, 30, and 57 fiber reactors was 99.1, 83.2, and 85.4%, respectively at a contact time of approximately 14 hours and a TNP loading of 40 mg/day. Results indicate TNP diffusion into the biofilm limited performance at high substrate concentrations.

Organic carbon promotes algae proliferation in membrane-aeration based bacteria-algae symbiosis system (MA-BA)

2020 ◽  
Vol 176 ◽  
pp. 115736 ◽  
Author(s):  
Han Zhang ◽  
Weijia Gong ◽  
Weichen Zeng ◽  
Zhongsen Yan ◽  
Baohui Jia ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Membrane Aeration

A biocatalytic cascade reaction sensitive to the gas–liquid interface: Modeling and upscaling in a dynamic membrane aeration reactor

2011 ◽  
Vol 68 (2) ◽  
pp. 154-161 ◽  
Author(s):  
Wouter Van Hecke ◽  
Dietmar Haltrich ◽  
Björn Frahm ◽  
Helmut Brod ◽  
Jo Dewulf ◽  
...  
Keyword(s):  
Cascade Reaction ◽  
Liquid Interface ◽  
Dynamic Membrane ◽  
Membrane Aeration ◽  
Interface Modeling

A New Approach to Minimizing Membrane Aeration Energy Costs

2008 ◽  
Vol 2 (4) ◽  
pp. 1-8
Author(s):  
J. Pawloski ◽  
J. Peeters ◽  
B. Ginzburg ◽  
J. Winn
Keyword(s):  
Energy Costs ◽  
New Approach ◽  
Membrane Aeration
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