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Updated: Apr 20, 2026
Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production
Published on: June 15, 2014
Thermal analysis and 454 pyrosequencing to evaluate the performance and mechanisms for deep stabilization and
Xiaowei Li1, Xiaohu Dai1, Shijie Yuan1
1State Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Urban Pollution Control, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
Abstract:
Biodrying was firstly used for post-treatment of anaerobically digested sludge (ADS) with wheat residues (WR) as bulking agents to improve its quality and reduce its amount. After 18days of biodrying, water was removed at a rate of 664.4gkg(-1) initial water at the typical ratio of ADS/WR. A separate aerobic incubation test showed that 8.11-14.84% of volatile solid (VS) was degraded in the ADS. The degradation of C- and H-containing materials (e.g., carboxylic acid) accounted for oxygen consumption and VS loss. The WR also showed strong biodegradability, and contributed approximately 86.01% of biogenerated heat during the process. Thermal balance analysis showed that the produced heat was primarily consumed through water evaporation and conductive transfer. 454 pyrosequencing implied the obvious succession from the anaerobic to aerobic microorganisms during the process. Some dominant Firmicutes, such as Clostridium and Bacillales, seemed to relate with organic matter degradation of the substrates.
