BioChem - DOS

Continuous biohydrogen production from waste bread by anaerobic sludge

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Han, Wei; Huang, Jingang; Zhao, Hongting; Li, Yongfeng

<P><B>Abstract</B></P> <P>In this study, continuous biohydrogen production from waste bread by anaerobic sludge was performed. The waste bread was first hydrolyzed by the crude enzymes which were generated by <I>Aspergillus awamori</I> and <I>Aspergillus oryzae</I> via solid-state fermentation. It was observed that 49.78g/L glucose and 284.12mg/L free amino nitrogen could be produced with waste bread mass ratio of 15% (w/v). The waste bread hydrolysate was then used for biohydrogen production by anaerobic sludge in a continuous stirred tank reactor (CSTR). The optimal hydrogen production rate of 7.4L/(Ld) was achieved at chemical oxygen demand (COD) of 6000mg/L. According to the results obtained from this study, 1g waste bread could generate 0.332g glucose which could be further utilized to produce 109.5mL hydrogen. This is the first study which reports continuous biohydrogen production from waste bread by anaerobic sludge.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Continuous biohydrogen production from waste bread by sludge was performed. </LI> <LI> The optimal hydrogen production rate of 7.4L/(Ld) was obtained. </LI> <LI> Ethanol and carbon dioxide accounted for the largest parts of consumed carbon. </LI> <LI> It could be calculated that 1g waste bread could produce 109.5mL hydrogen. </LI> </UL> </P>

2016

Elsevier

publisher-specific-oa

0960-8524

212

pp.1-5

10.1016/j.biortech.2016.04.007

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART75416324

http://manuscript.elsevier.com/S0960852416304795/pdf/S0960852416304795.pdf

Waste bread; Biohydrogen production; Continuous stirred tank reactor; Chemical oxygen demand