An evaluation of the phosphorus storage capacity of an anaerobic/aerobic sequential batch biofilm reactor
| Autor: | Ren-Jie Chiou, Yi-Rong Yang |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Environmental Engineering
chemistry.chemical_element Bioengineering Waste Disposal Fluid Polyhydroxyalkanoates Phosphates Water Purification chemistry.chemical_compound Bioreactors Bioreactor Anaerobiosis Biomass Waste Management and Disposal Dose-Response Relationship Drug Renewable Energy Sustainability and the Environment Chemistry Polyphosphate Phosphorus Hydrolysis Environmental engineering Biofilm General Medicine Pulp and paper industry Aerobiosis Carbon Oxygen Biofilms Fermentation Aerobie Aeration Anaerobic exercise Biotechnology |
| Zdroj: | Bioresource technology. 99(10) |
| ISSN: | 0960-8524 |
| Popis: | The aim of this work was to assess the phosphorus storage capability of the polyphosphate (poly-P) accumulating organisms (PAO) in the biofilm using a sequential batch biofilm reactor (SBBR). In the anaerobic phase, the specific COD uptake rates increases from 0.05 to 0.22 (mg-COD/mg-biomass/h) as the initial COD increases and the main COD uptake activity occurs in the initial 30 min. The polyhydroxyalkanoates (PHAs) accumulation from 18 to 38 (mg-PHA/g-biomass) and phosphorus release from 20 to 60 (mg-P/L) share a similar trend. The adsorbed COD cannot be immediately transformed to PHAs. Since the PHAs' demand per released phosphorus is independent of the initial COD, the enhancement of the PHA accumulation would be of benefit to phosphorus release. The only requirement is to have an initial amount of substrate that will result in sufficient PHA accumulation (approximately 20 mg-PHA/g-biomass) for phosphorus release. During the aerobic phase, the aeration should not only provide sufficient dissolved oxygen, but should also enhance the mass transfer and the diffusion. In other words, the limitation to the phosphorus storage capability always occurs during the anaerobic phase, not the aerobic phase. |
| Databáze: | OpenAIRE |
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