Simulation and Optimization of Domestic Wastewater Nutrients Removal Process: Vfas as External Carbon Source

Abstract:

The aim of this study is to investigate the effect of nutrient removal process by addition of volatile fatty acids (VFAs) as external carbon sources, and how a model can be applied to a pilot test system to simulate the system. The results showed that: the effect of nutrients removal can be substantially increased with the addition of VFAs: before the addition of VFAs, the removal rate of TN and TP are 22% and 26% respectively; after the addition of VFAs, removal rates of TN and TP achieved 74% and 80% respectively. From an error analysis between simulated value and experimental value on the condition of external carbon addition, the average relative errors of CODcr, TN, NH3-N and NO3-N are 9.5%,23.4%,36% and 22% respectively, which illuminated the correctness of the model; optimum working conditions of the system established by the model are: internal reflux ratio is 200%,external reflux ratio is 75%,sludge retention time is 10d.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 6554-6560
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.6554
• Online since: November 2011
• Authors: Mao Dong Hu, Xue Fei Zhou, Ya Lei Zhang, Ming Jiang, Yan Zhong Tan
• Keywords: Additional Carbon Source, ADM1, ASM2D, Mathematic Modeling

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