4. Conclusion
Codigestion of Taihu blue algae with swine manure resulted in improved CH4 yield of 212.7 mL g−1 VS at ISR 2.0, while digestion of blue algae simply led to optimized CH4 production of 73.5 mL g−1 VS at ISR 3.0. During the digestion and codigestion processes, pH, TAN and VFAs corroborated the appropriate stability of the anaerobic processes and showed no significant difference. VS removal and key enzymes variation manifested codigestion had higher efficiencies in biodegradation and methanation, which confirmed AD of blue algae with swine manure is a promising technology for both solid wastes treatment and renewable-energy production.