A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of Oxygen Partial Pressure and Chemical Oxygen Demand Loading on the Biofilm Properties in Membrane‐Aerated Bioreactors
Membrane‐aerated biofilms with oxygen and nutrients diffusing from the opposite sides possess distinct properties, including the ability to couple aerobic and anaerobic processes. The objective of this study was to examine the effects of oxygen partial pressure and chemical oxygen demand (COD) loading on biofilm properties. Two laboratory‐scale membrane‐aerated bioreactors were operated for a total of 283 days, with one reactor operated at 42, 60, and 89 kPa (0.41, 0.59, and 0.88 atm) oxygen, and the other reactor at 25 kPa (0.25 atm) oxygen (air control). The biofilm detached at the oxygen partial pressures of 60 and 89 kPa (0.59 and 0.88 atm) at a COD loading of 11.3 kg COD/1000 m 2/d, but was sustained at the oxygen partial pressures of 25 and 42 kPa (0.25 and 0.41 atm), with a porous structure at the membrane interface at the COD loading of 11.3 kg COD/1000 m 2/d. Biofilm formation was improved at a higher COD loading. It is proposed that the loss of extracellular polymeric substances at the biofilm bottom is the cause for the biofilm detachment subjected to a higher oxygen partial pressure.
Effect of Oxygen Partial Pressure and Chemical Oxygen Demand Loading on the Biofilm Properties in Membrane‐Aerated Bioreactors
Membrane‐aerated biofilms with oxygen and nutrients diffusing from the opposite sides possess distinct properties, including the ability to couple aerobic and anaerobic processes. The objective of this study was to examine the effects of oxygen partial pressure and chemical oxygen demand (COD) loading on biofilm properties. Two laboratory‐scale membrane‐aerated bioreactors were operated for a total of 283 days, with one reactor operated at 42, 60, and 89 kPa (0.41, 0.59, and 0.88 atm) oxygen, and the other reactor at 25 kPa (0.25 atm) oxygen (air control). The biofilm detached at the oxygen partial pressures of 60 and 89 kPa (0.59 and 0.88 atm) at a COD loading of 11.3 kg COD/1000 m 2/d, but was sustained at the oxygen partial pressures of 25 and 42 kPa (0.25 and 0.41 atm), with a porous structure at the membrane interface at the COD loading of 11.3 kg COD/1000 m 2/d. Biofilm formation was improved at a higher COD loading. It is proposed that the loss of extracellular polymeric substances at the biofilm bottom is the cause for the biofilm detachment subjected to a higher oxygen partial pressure.
Effect of Oxygen Partial Pressure and Chemical Oxygen Demand Loading on the Biofilm Properties in Membrane‐Aerated Bioreactors
Zhu, I. X. (author) / Allen, D. G. (author) / Liss, S. N. (author)
Water Environment Research ; 81 ; 289-297
2009-03-01
9 pages
Article (Journal)
Electronic Resource
English
Novel, Low-Energy, Membrane-Aerated Bioreactors (MABRs) for Greywater Reuse
| British Library Conference Proceedings | 2014
Investigation of oxygen transfer rates in full scale membrane bioreactors
| British Library Conference Proceedings | 2003
Research on nitrogen removal performance of membrane aerated biofilm reactor
| DOAJ | 2024
Development and Application of Membrane Aerated Biofilm Reactor (MABR)—A Review
| DOAJ | 2023