BioChem - DOS

Influence of sulfate-reducing bacteria, sulfide and molybdate on hydrogen photoproduction by purple nonsulfur bacteria

International journal of hydrogen energy

Laurinavichene, T.V.; Laurinavichius, K.S.; Belokopytov, B.F.; Laurinavichyute, D.K.; Tsygankov, A.A.

The interaction between bacterial species is of great importance for H<SUB>2</SUB> production using microbial consortia or non-sterile conditions. Sulfate reducing bacteria were found in anaerobic starch-hydrolyzing consortium and their inhibitory effect on the following H<SUB>2</SUB> photoproduction by purple nonsulfur bacteria was shown. This inhibition was clearly demonstrated in the mixed culture of Rhodobacter sphaeroides and Desulfomicrobium baculatum using the synthetic medium. This effect was conditioned by sulfide production rather than H<SUB>2</SUB> consumption or competition for organic substrate. Actually, the addition of equivalent sulfide concentration brought about the similar effects: inhibition of H<SUB>2</SUB> production without growth inhibition, cells aggregation, and the increase of carbohydrate content as an alternative way of expenditure of organic acids. In the long-term experiments the average sulfide concentration of about 0.3 mM was detrimental while in short-terms the H<SUB>2</SUB> production was not inhibited even at 3.2 mM. The protective effect of molybdates against sulfate reducers and sulfide was discussed.

2013

Pergamon Press ; Elsevier Science Ltd

0360-3199

1879-3487

38

14

pp.5545-5554

10.1016/j.ijhydene.2013.02.097

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART65883608

Hydrogen photoproduction; Purple nonsulfur bacteria; Sulfate reducing bacteria; Sulfide effect; Molybdate effect; Carbohydrates