Different types of H 2 photoproduction by starch-utilizing co-cultures of Clostridium butyricum and Rhodobacter sphaeroides
| Autor: | Anatoly A. Tsygankov, Tatyana V. Laurinavichene |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
biology
Renewable Energy Sustainability and the Environment Starch 05 social sciences Energy Engineering and Power Technology 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics biology.organism_classification Purple bacteria Clostridia chemistry.chemical_compound Rhodobacter sphaeroides Light intensity Fuel Technology Clostridium chemistry Biochemistry 0502 economics and business Yeast extract Food science 050207 economics 0210 nano-technology Clostridium butyricum |
| Zdroj: | International Journal of Hydrogen Energy. 41:13419-13425 |
| ISSN: | 0360-3199 |
| Popis: | Co-culture of Clostridium butyricum and Rhodobacter sphaeroides displayed different types of H 2 photoproduction from starch: quick low-yield (2.6 mol/mol glucose), prolonged high-yield (6.1 mol/mol glucose) and delayed low-yield (4.2 mol/mol glucose). It depended primarily on the ratio of two species and, besides, some other factors. The first type H 2 photoproduction was similar to that in Clostridium , observed at high clostridia/purple bacteria ratio and promoted by low light intensity, temperature above and below optimum, reduced conditions, low initial pH or buffer concentration, high concentration of yeast extract (320 mg/L). The second type, high yield H 2 production, was favored by low clostridia/purple bacteria ratio, high light intensity, and high concentration of yeast extract (320 mg/L). The third type, delayed H 2 photoproduction, was observed at the lowest clostridia/purple bacteria ratio and was promoted by low concentration of yeast extract (25 mg/L). Thus, a well-known crucial effect of a species ratio on H 2 photoproduction was in turn controlled by other factors, especially yeast extract concentration. |
| Databáze: | OpenAIRE |
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