BioChem - DOS

Fermentative hydrogen production from fresh leachate in batch and continuous bioreactors

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

Liu, Qiang; Zhang, Xiaolei; Yu, Lijia; Zhao, Aihua; Tai, Jun; Liu, Jianyong; Qian, Guangren; Xu, Zhi Ping

<P><B>Research highlights</B></P><P>&#x025BA; Hydrogen is produced from fresh leachate for the first time. &#x025BA; Phosphate addition significantly enhances hydrogen production from fresh leachate. &#x025BA; Hydrogen production is mainly determined by the organic loading rate in EGSB reactor. &#x025BA; Hydrogen production from fresh leachate mainly undergoes ethanol-type fermentation.</P> <P><B>Abstract</B></P><P>This research for the first time investigated hydrogen production from the fresh leachate originated from municipal solid wastes. We found that fermentation of the leachate generated H<SUB>2</SUB> and was very much enhanced in the presence of extra phosphate in the batch reactor. The continuous expanded granular sludge bed (EGSB) reactor started to generate H<SUB>2</SUB> at day 20 and continued to 176days with 120mg/l of extra phosphate present. The highest chemical oxygen demand (COD) removal efficiency (66.9%) was achieved at liquid up-flow velocity of 3.7m/h and hydraulic retention time of 12h. Under proposed optimal operation conditions, the mean H<SUB>2</SUB> production rate reached up to 2155ml/(lday). We also found that over 80% liquid metabolites were acetic acid and ethanol, suggesting the ethanol-type fermentation was dominant in the bioreactor. These findings indicate that the fresh leachate can be used as the source for continuous hydrogen production.</P>

2011

0960-8524

102

9

pp.5411-5417

10.1016/j.biortech.2010.10.061

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART55759436

Hydrogen bioproduction; Fresh leachate; Batch bioreactor; Expanded granular sludge bed (EGSB) bioreactor; Phosphate