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Project title:


Granular Carbon Source Reclamation and Activated Primary System Mechanism of Urban Sewage Treatment

Project leader:


Zhang Qionghua


Carbon source shortage during sewage treatment processes is a common problem in cities with a low carbon-nitrogen ratio. Therefore, this project is set to calculate the materials and energy flows by using the CFD system. It also seeks to analyze the sedimentation characteristics of matter at different water fluxes and HRT. Furthermore, based on the rules of flow deformation for states-of-matter in traditional primary systems, the project aimed to discuss the utilization of carbon source in input water and its loss during the whole process of sewage treatment. Also, it presents the characteristics of granular microorganisms for organics degradation and hydrolysis. Besides, the project is to discuss the quantity of carbon source in primary systems, and comprehend the rules of carbon source utilization and its multiplication in the whole system, as well as evaluating the recyclability of granular carbon source in the primary system. The project also will verify the fermentation effect of primary sludge and the release potential of carbon source in the primary system by analyzing the factors influencing carbon source release and recycling during primary sludge fermentation. Moreover, the project seeks to elucidate the fermentation mechanism of primary sludge and distribution of microbial species. The project will improve the elutriation and fermentation of primary sewage, and develop a carbon source recycling model, along with building a system of carbon source materials balance in the primary system. Overall, the project will maximize the utilization and multiplication of carbon source during sewage treatment processes by continuous technological tests and will provide technical support for carbon source reclamation and sewage reduction.