Fermentative hydrogen production by conventionally and unconventionally heat pretreated seed cultures: A comparative assessment

P. Bakonyi, B. Borza, K. Orlovits, V. Simon, N. Nemestóthy, K. Bélafi-Bakó

Research output: Article

29 Citations (Scopus)

Abstract

In this study, the effects of pretreatment temperature and time during conventional and unconventional, microwave-assisted heat shock on the hydrogen producing capability of anaerobic seed sludge from soluble starch was focused. It was found that the different heat transfer techniques resulted in seed cultures with comparable hydrogen production potentials, with the highest obtainable values of approximately 0.9 L H2/L-d. A comprehensive, statistical analysis revealed that both treatment temperature and time could be designated as significant process variables, however, in distinguishable extents for the two alternative methods. The results indicated that microwave-based sludge pretreatment needed remarkably shorter curing times (2 min) to eliminate H2-consuming, methanogenic activity in comparison to the conventional heat shock method (30 min). It was also demonstrated that microwave irradiation increased the soluble organic matter content in the seed sludge.

Original languageEnglish
Pages (from-to)5589-5596
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number11
DOIs
Publication statusPublished - ápr. 4 2014

Fingerprint

sludge
hydrogen production
Hydrogen production
Seed
seeds
microwaves
heat
pretreatment
shock
Microwaves
Microwave irradiation
starches
curing
Starch
statistical analysis
Biological materials
Curing
Statistical methods
heat transfer
Heat transfer

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

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title = "Fermentative hydrogen production by conventionally and unconventionally heat pretreated seed cultures: A comparative assessment",
abstract = "In this study, the effects of pretreatment temperature and time during conventional and unconventional, microwave-assisted heat shock on the hydrogen producing capability of anaerobic seed sludge from soluble starch was focused. It was found that the different heat transfer techniques resulted in seed cultures with comparable hydrogen production potentials, with the highest obtainable values of approximately 0.9 L H2/L-d. A comprehensive, statistical analysis revealed that both treatment temperature and time could be designated as significant process variables, however, in distinguishable extents for the two alternative methods. The results indicated that microwave-based sludge pretreatment needed remarkably shorter curing times (2 min) to eliminate H2-consuming, methanogenic activity in comparison to the conventional heat shock method (30 min). It was also demonstrated that microwave irradiation increased the soluble organic matter content in the seed sludge.",
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TY - JOUR

T1 - Fermentative hydrogen production by conventionally and unconventionally heat pretreated seed cultures

T2 - A comparative assessment

AU - Bakonyi, P.

AU - Borza, B.

AU - Orlovits, K.

AU - Simon, V.

AU - Nemestóthy, N.

AU - Bélafi-Bakó, K.

PY - 2014/4/4

Y1 - 2014/4/4

N2 - In this study, the effects of pretreatment temperature and time during conventional and unconventional, microwave-assisted heat shock on the hydrogen producing capability of anaerobic seed sludge from soluble starch was focused. It was found that the different heat transfer techniques resulted in seed cultures with comparable hydrogen production potentials, with the highest obtainable values of approximately 0.9 L H2/L-d. A comprehensive, statistical analysis revealed that both treatment temperature and time could be designated as significant process variables, however, in distinguishable extents for the two alternative methods. The results indicated that microwave-based sludge pretreatment needed remarkably shorter curing times (2 min) to eliminate H2-consuming, methanogenic activity in comparison to the conventional heat shock method (30 min). It was also demonstrated that microwave irradiation increased the soluble organic matter content in the seed sludge.

AB - In this study, the effects of pretreatment temperature and time during conventional and unconventional, microwave-assisted heat shock on the hydrogen producing capability of anaerobic seed sludge from soluble starch was focused. It was found that the different heat transfer techniques resulted in seed cultures with comparable hydrogen production potentials, with the highest obtainable values of approximately 0.9 L H2/L-d. A comprehensive, statistical analysis revealed that both treatment temperature and time could be designated as significant process variables, however, in distinguishable extents for the two alternative methods. The results indicated that microwave-based sludge pretreatment needed remarkably shorter curing times (2 min) to eliminate H2-consuming, methanogenic activity in comparison to the conventional heat shock method (30 min). It was also demonstrated that microwave irradiation increased the soluble organic matter content in the seed sludge.

KW - Biohydrogen

KW - Heat

KW - Irradiation

KW - Microwave

KW - Pretreatment

KW - Sludge

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