New cyanobacterial strains for biohydrogen production

Under certain conditions, cyanobacteria can switch from photosynthesis to hydrogen production, which is a good energy carrier. However, the biological diversity of hydrogenreleasing cyanobacteria has a great unexplored potential. This study is aimed to investigate the ability of new strains of cyanobacteria Cyanobacterium sp. IPPAS B-1200, Dolichospermum sp. IPPAS B-1213, and Sodalinema gerasimenkoae IPPAS B-353 to release H2 and to evaluate the effects of photosystem II inhibitor 3-(3,4-dichlorphenyl)-1,1-dimethylurea (DCMU) on H2 production under light and dark conditions. The results showed that cultures treated with DCMU produced several times more H2 than untreated cells. The highest rate of H2 photoproduction of 4.24 mmol H2 (mg Chl a h)-1 was found in a Dolichospermum sp. IPPAS B (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.