Model-based analysis of increased loads on the performance of activated sludge and waste stabilization ponds

摘要: In a way to counter criticism on low cost-effective conventional activated sludge (AS) technology, waste stabilization ponds (WSPs) offer valid alternative for wastewater treatment due their simple and inexpensive operation. To evaluate this with respect its robustness resilience capacity, we perform in silico experiments of different peak-load scenarios two mathematical models representing the systems. A systematic process quality assurance these virtual is implemented, including sensitivity identifiability analysis, non-linear error propagation. Moreover, model calibration 210-day real experiment 31 days increased load was added evaluation. Generally speaking, increased-load run showed that WSP systems are more resilient towards intermediate disturbances, hence, suitable treat not only municipal wastewater, but also industrial such as poultry paperboard wastewater. However, when disturbances extreme (over 7000 mg COD.L-1), common design natural system fails better than AS. Besides, application analysis reveals most influential parameters performance AS system, related autotrophic bacteria have highest influence dynamics particulate organic matter, while nitrogen removal largely driven by nitrification denitrification. Conversely, an insignificant contribution heterotrophs, nutrient pond mostly done algal assimilation. Furthermore, model-based proved be means investigating maximum systems, from avoiding environmental problems high economic costs cleaning surface waters after severe overload events.