BioChem - DOS

Biohydrogen production from microalgal biomass: Energy requirement, CO2 emissions and scale-up scenarios

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

Ferreira, A.F.; Ortigueira, J.; Alves, L.; Gouveia, L.; Moura, P.; Silva, C.

This paper presents a life cycle inventory of biohydrogen production by Clostridium butyricum through the fermentation of the whole Scenedesmus obliquus biomass. The main purpose of this work was to determine the energy consumption and CO<SUB>2</SUB> emissions during the production of hydrogen. This was accomplished through the fermentation of the microalgal biomass cultivated in an outdoor raceway pond and the preparation of the inoculum and culture media. The scale-up scenarios are discussed aiming for a potential application to a fuel cell hybrid taxi fleet. The H<SUB>2</SUB> yield obtained was 7.3gH<SUB>2</SUB>/kg of S. obliquus dried biomass. The results show that the production of biohydrogen required 71-100MJ/MJ<SUB>H2</SUB> and emitted about 5-6kgCO<SUB>2</SUB>/MJ<SUB>H2</SUB>. Other studies and production technologies were taken into account to discuss an eventual process scale-up. Increased production rates of microalgal biomass and biohydrogen are necessary for bioH<SUB>2</SUB> to become competitive with conventional production pathways.

2013

Elsevier Applied Science

0960-8524

144

pp.156-164

10.1016/j.biortech.2013.06.079

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART66561800

http://repositorio.lneg.pt/bitstream/10400.9/2293/1/BioresourceTechnology_Vol.144_156.pdf

Biohydrogen; Scenedesmus obliquus; CO2 emissions; Energy consumption; Scale-up scenarios