The Characteristics of the Mixed Sludge Supernatant by Mesophilic Two-Phase Anaerobic Digestion Process

Abstract:

The mesophilic (35°C) two-phase anaerobic digestion ( TPAD) process was used to treat mixed sludge from primary sedimentation and secondary sedimentation tanks ( 1:3 ). The results show that when HRT is 10 days and organic loading rate is 1.5kgVS/ (m3•d), the upper-liquid COD of methanogenic phase and acidogenic phase increased along with time, but not obviously; The contents o^{Superscript text}f polysaccharides and proteins in upper-liquid multiplied increased with digestion time, polysaccharides and proteins in acidogenic phase upper-liquid were more than methanogenic phase; The value of CST became larger after being digested by mesophilic two-phase anaerobic digestion, but the dewaterability of sludge in methanogenic phase is better than acidogenic phase.

• Periodical: Applied Mechanics and Materials (Volumes 295-298)
• Pages: 1393-1397
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.295-298.1393
• Online since: February 2013
• Authors: Qi Wei Liu, Xiao Yu Zhang
• Keywords: Polysaccharide, Protein, Sludge Liquid, Two-Phase Anaerobic Digestion

References

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DOI: 10.1080/00139307109434990