Seed Pretreatment for Increased Hydrogen Production Using Mixed-Culture Systems with Advantages over Pure-Culture Systems

Hydrogen is an important source of energy and is considered as the future energy carrier post-petroleum era. Nowadays hydrogen production through various methods is being explored and developed to minimize the production costs. Biological hydrogen production has remained an attractive option, highly...

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Bibliographic Details
Published in:Energies (Basel) 2019-02, Vol.12 (3), p.530
Main Authors: Pachapur, Vinayak Laxman, Kutty, Prianka, Pachapur, Preetika, Brar, Satinder Kaur, Le Bihan, Yann, Galvez-Cloutier, Rosa, Buelna, Gerardo
Format: Article
Language:English
Subjects:
Acetylene
Acids
Biogas
Carbohydrates
Cell culture
Cellulase
chemical
Chemical treatment
Civil engineering
Energy
Fermentation
Glycerol
heat
Heat treatment
Hydrogen
Hydrogen production
Metabolic pathways
Metabolism
Metabolites
microwave
mixed-culture
Mutants
nanoparticle
Organic chemistry
organic-wastes
Pretreatment
Sewage sludge
Sludge digestion
ultrasound
Wastewater
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Summary:Hydrogen is an important source of energy and is considered as the future energy carrier post-petroleum era. Nowadays hydrogen production through various methods is being explored and developed to minimize the production costs. Biological hydrogen production has remained an attractive option, highly economical despite low yields. The mixed-culture systems use undefined microbial consortia unlike pure-cultures that use defined microbial species for hydrogen production. This review summarizes mixed-culture system pretreatments such as heat, chemical (acid, alkali), microwave, ultrasound, aeration, and electric current, amongst others, and their combinations to improve the hydrogen yields. The literature representation of pretreatments in mixed-culture systems is as follows: 45–50% heat-treatment, 15–20% chemical, 5–10% microwave, 10–15% combined and 10–15% other treatment. In comparison to pure-culture mixed-culture offers several advantages, such as technical feasibility, minimum inoculum steps, minimum media supplements, ease of operation, and the fact it works on a wide spectrum of low-cost easily available organic wastes for valorization in hydrogen production. In comparison to pure-culture, mixed-culture can eliminate media sterilization (4 h), incubation step (18–36 h), media supplements cost ($4–6 for bioconversion of 1 kg crude glycerol (CG)) and around 10–15 Millijoule (MJ) of energy can be decreased for the single run.
ISSN:1996-1073
1996-1073
DOI:10.3390/en12030530