Impact of Attrition Ball-Mill on Characteristics and Biochemical Methane Potential of Food Waste

The impact of attrition ball-mill pretreatment on food waste particle size, soluble chemical oxygen demand (SCOD), biochemical methane potential, and microbial community during anaerobic digestion was investigated based milling speed time. uniformity size improved with increasing SCOD the pretreated samples increased to 4%, 7%, 17% at speeds 150, 225, 300 rpm, respectively, compared control. Milling time did not significantly change SCOD. cumulative productions 430, 440, 490 mL/g-VS were observed while untreated sample exhibited production 390 mL/g-VS. Extended improve much. When times 10, 20, 30 min applied fixed 490, 510, 500 respectively. Ball-mill also total volatile fatty acids. During (AD) treated waste, acetoclastic methanogens predominated, a relative abundance 48–49%. Interestingly, hydrogenotrophic 1.6 higher in than those These results showed potential ball as for improving production.