초록
<P><B>Abstract</B></P> <P>Hydrogenogenic batch fermentation without nutrients addition was investigated at different SLS: POME mixing ratios of 100:0, 95:5, 90:10, 85:15, 80:20, 75:25, 70:30, 65:35, 60:40, 55:45,50:50, and 0:100 (Volatile Solid, VS basis) at initial organic concentrations of 21 and 7 g-VS/L. Satisfactory hydrogen yield of 84.5 ± 0.7 mL H<SUB>2</SUB>/g-VS<SUB>added</SUB> was achieved from 7 g-VS/L batch having SLS: POME-VS mixing ratio of 55:45. Adding NaHCO<SUB>3</SUB> 3 g/L or 0.43 g-NaHCO<SUB>3</SUB>/g-VS) in the two-stage anaerobic system at 7 g-VS/L could provide sufficient buffering capacity. Hydrogenogenic effluent from 7 g-VS/L batch at SLS: POME mixing ratio of 55:45 (VS basis) could further generate rather high methane yield of 311.2 ± 8.0 mL- CH<SUB>4</SUB>/g-VS<SUB>added</SUB> in themethanogenic stage.According to the experimental results, bio-hythane approximately 55.5 × 10<SUP>6</SUP> m<SUP>3</SUP>/year with 21% (V/V) of hydrogen, equivalent to51.0 × 10<SUP>6</SUP> <SMALL>L</SMALL>-gasoline could be produced potentially from 3.88 × 10<SUP>6</SUP> m<SUP>3</SUP> of mixed SLS and POME through the two-stage anaerobic co-digestion.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Synthetic nutrients is not required for co-digestion of SLS and POME. </LI> <LI> Co-digesting SLS with POME is capable of creating synergetic effect. </LI> <LI> H<SUB>2</SUB> yield 84.5 mL/g-VS<SUB>added</SUB> and CH<SUB>4</SUB> yield of 311.2 mL/g-VS<SUB>added</SUB> were achieved. </LI> <LI> Two-stage anaerobic process is technically feasible for generation of bio-hythane. </LI> </UL> </P>