Improvement of hydrogen production of Chlamydomonas reinhardtii by co-cultivation with isolated bacteria

► Three bacteria isolated from contaminated algal cultures are identified. ► They belong to genera Stenotrophomonas, Microbacterium and Pseudomonas, respectively. ► Co-cultures of isolated bacteria with pure algae improved H2 production obviously. ► Increased O2 consumption of co-cultures is the main reason for enhancement of H2 yield.