Abstract
Alternative designs of an aerated moving-bed biofilm reactor and a flat-sheet membrane module for a biofilm membrane bioreactor process have been investigated to overcome a membrane clogging problem and to determine the performance of a new membrane module. Double-deck aerated biofilm reactor with integrated designs of sludge hopper, thickener, and velocity-zone concept for particle settlement was evaluated for the suspended solid control and removal. Hydrodynamics of bubbling, liquid, and solid particles were arranged in the bioreactor to obtain a particle settlement. New membrane modules used under low suspended solid environment having smaller membrane gaps were evaluated for filtration performance and clogging problems for long-term operation. The average suspended solids concentration in the bioreactor effluent was 44.6 mg/L. Relaxation applied with the membrane module provided the most optimum result for fouling control, and no clogging problems in the modules were observed in the system after continuous operation of 3 weeks.
Original language | English (US) |
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Pages (from-to) | 1291-1297 |
Number of pages | 7 |
Journal | AIChE Journal |
Volume | 55 |
Issue number | 5 |
DOIs | |
State | Published - May 2009 |
Externally published | Yes |
Keywords
- Biofilm membrane bioreactor
- Bioreactor design
- Flat sheet membrane modules
- Moving-bed biofilm
- Sludge control
ASJC Scopus subject areas
- General Chemical Engineering
- Biotechnology
- Environmental Engineering