乙酸/丙酸作为EBPR碳源的动力学模型研究(Ⅰ)--模型的建立

Kinetic Model of Enhanced Biological Phosphorus Removal with Mixed Acetic and Propionic Acids as Carbon Sources(Ⅰ): Model Constitution

以活性污泥ASM2模型为基础,采用混合短链脂肪酸(SCFAs)作为基准物质,建立了增强生物除磷系统中聚磷菌和(PAO)的厌氧/好氧动力学模型.模型的显著特点是厌氧代谢过程中的糖原水解、聚羟基烷酸合成、以及聚磷水解速率由SCFAs的速率方程表示,并考虑了厌氧维持对动力学和计量学的影响.模型建立了过程计量学系数矩阵,包括3个溶解性组分、4个颗粒性组分,同时考虑了pH对代谢动力学的影响.最后,在PAO模型的基础上,建立了GAO的动力学模型,该模型包含7个过程,磷的浓度仅对其好氧生长有影响.

Based on activated sludge model No. 2 （ASM2）, the anaerobic/aerobic kinetic model of phosphorus-accumulating organisms （PAO） was established with mixed short-chain fatty acids （SCFAs） as the base substance in enhanced biological phosphorus removal process. The characteristic of the PAO model was that the anaerobic metabolism rates of glycogen degradation, poly-13- hydroxyalkanoates synthesis and polyphosphate hydrolysis were expressed by SCFAs uptake equation, and the effects of anaerobic maintenance on kinetics and stoichiometry were considered. The PAO kinetic model was composed of 3 soluble components, 4 particulate components and a pH parameter, which constituted the matrix of stoichiometric coefficients. On the basis of PAO model, the GAO kinetic model was established, which included 7 processes, and phosphorus content influenced the aerobic metabolism only.