Anaerobic digestion
To improve the stability of the corn straw anaerobic digestion (AD) system and the activity of anaerobic microorganisms, CO2-nanobubble water (CO2-NBW) and iron nanoparticles (Fe0NPs) were added simultaneously to exploit individual advantages to enhance the methanogenesis process. Results show that the AD performance was enhanced by supplementing with CO2-NBW or Fe0NPs individually, and could be further improved by simultaneous addition of the two additives.