Effect of organic loading rate on dark fermentative hydrogen production in the continuous stirred tank reactor and continuous mixed immobilized sludge reactor from waste pastry hydrolysate
메타 데이터
바이오화학분류
바이오정밀화학
연료
논문
Effect of organic loading rate on dark fermentative hydrogen production in the continuous stirred tank reactor and continuous mixed immobilized sludge reactor from waste pastry hydrolysate
<P><B>Abstract</B></P> <P>Waste pastry (6%, w/v) was hydrolyzed by the produced glucoamylase and protease to obtain the glucose (19.8g/L) and free amino nitrogen (179mg/L) solution. Then, the effect of organic loading rate (OLR) (8–40kgCOD/(m<SUP>3</SUP> d)) on dark fermentative hydrogen production in the continuous stirred tank reactor (CSTR) and continuous mixed immobilized sludge reactor (CMISR) from waste pastry hydrolysate was investigated and compared. The maximum hydrogen production rate of CSTR (277.76mL/(hL)) and CMISR (320.2mL/(hL)) were achieved at OLR of 24kgCOD/(m<SUP>3</SUP> d) and 32kgCOD/(m<SUP>3</SUP> d), respectively. Carbon recovery ranged from 75.2–84.1% in the CSTR and CMISR with the balance assumed to be converted to biomass. One gram waste pastry could produce 0.33g (1.83mmol) glucose which could be further converted to 79.24mL (3.54mmol) hydrogen in the CMISR or 91.66mL (4.09mmol) hydrogen in the CSTR. This is the first study which reports dark fermentative hydrogen production from waste pastry.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Hydrogen production from waste pastry hydrolysate was performed in the CSTR and CMISR. </LI> <LI> The optimal hydrogen production rate of 277.76mL/(hL) was obtained in the CSTR. </LI> <LI> The maximum hydrogen production rate of CMISR was 320.2mL/(hL) </LI> <LI> One gram waste pastry could be converted to 91.66mL hydrogen in the CSTR. </LI> <LI> This is the first study which reports hydrogen production from waste pastry. </LI> </UL> </P>