초록
Cyanobacteria are an inexpensive and sustainable source of photobiological H<SUB>2</SUB> production due to their simple nutritional conditions. Combination of toxic contaminant degradation with H<SUB>2</SUB> production is a promising approach in wastewater treatment. This study demonstrated that Lyngbya sp., a filamentous cyanobacterium, can generate H<SUB>2</SUB> in the presence of benzoate which is a central intermediate during the anaerobic degradation of many aromatic compounds. The highest H<SUB>2</SUB> production rate of 17.05 μmol H<SUB>2</SUB>/g Chla/h was obtained in the second cycle and 600 mg/L benzoate was depleted within 64 h in H<SUB>2</SUB> production test. The strain has shown a higher H<SUB>2</SUB>-producing capacity, which was comparable to those of certain noted strains such as N<SUB>2</SUB>-fixing filamentous Anabaena variabilis PK84 and non-N<SUB>2</SUB>-fixing filamentous Microcystis PCC 7806. The co-metabolism of benzoate for H<SUB>2</SUB> production by Lyngbya sp. makes it an interesting model strain for clean energy production and hazardous pollutant removal.