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Outline

 

Project title:

 

 

A study on the mechanism of propionic acid accumulation in thermophilic methane fermentation and technologies for process control

Project leader:

 

Li Qian

Abstract:

Due to the accumulation of propionic acid in thermophilic methane fermentation, stable performance and efficient energy recovery aredifficultto achieve. In this project, the mechanism of propionic acid accumulation in thermophilic methane fermentation and technologies for process control will be systematically studied with the entry point of the phenomenon and driving factors analysis. Batch test combined with continuous pilot experiment will be employed for the mechanism studies of propionic acid accumulation associated with chemical, microbiological and molecular biological analysis. The dynamic mechanism of propionic acid production in hydrolysis and acid ogenesis will be confirmed by bio-ecological environment condition analysis. The role of environmental factors and inter species electron transfer will be investigated to identify the pathway and biochemical principle of propionic acid conversion. The multiple technologies for process control of thermophilic methane fermentation will be established based on the study of accumulation control and degradation enhancement of propionic acid. Findings will provide a theoretical and technical foundation for optimizing the design of thermophilic digesters and achieving stable performance with high-efficient energy recovery.