Modelling High-temperature EBPR by Incorporating Glycogen and GAOs: Challenges from a Preliminary Study
| Autor: | Pei Yee Ho, Kee Fui Liau, Tadashi Shoji, Adeline Seak May Chua, Hak Koon Yeoh |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Hot Temperature Activated sludge model 010501 environmental sciences 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Polyphosphates Environmental Chemistry Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Glycogen Sewage Management science Chemistry Ecological Modeling Glycogen metabolism Phosphorus Models Theoretical Pollution Kinetics 030104 developmental biology Enhanced biological phosphorus removal Biochemical engineering |
| Zdroj: | Water environment research : a research publication of the Water Environment Federation. 89(1) |
| ISSN: | 1061-4303 |
| Popis: | Recently reported kinetic and stoichiometric parameters of the Activated Sludge Model no. 2d (ASM2d) for high-temperature EBPR processes suggested that the absence of glycogen in the model contributed to underestimation of PHA accumulation at 32 °C. Here, two modified ASM2d models were used to further explore the contribution of glycogen in the process. The ASM2d-1G model incorporated glycogen metabolism by PAOs (polyphosphate-accumulating organisms), while the ASM2d-2G model further included processes by GAOs (glycogen-accumulating organisms). These models were calibrated and validated using experimental data at 32 °C. The ASM2d-1G model supported the hypothesis that the excess PHA was attributed to glycogen, but remained inadequate to capture the dynamics of glycogen without considering GAOs activities. The ASM2d-2G model performed better, but it was challenging to calibrate as it often led to wash-out of either PAOs or GAOs. Associated hurdles are highlighted and additional efforts in calibrating ASM2d-2G more effectively are proposed. |
| Databáze: | OpenAIRE |
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