Study on bio-hydrogen production of different fermentation types

By the researches and analyses of the fermentation type in the bio-hydrogen production system, ethanol-type fermentation bacteria had the largest H-2-production capability, butyric acid type fermentation bacteria took the second place, and propionic acid-type fermentation bacteria had the least H-2-poduction capability. When the organic loading rate (OLR) is 24kgCOD/m(3).d, HRT is 8h and temperature is 35 degrees C, the highest hydrogen production capability corresponding were 4.2, 1.3 and 0.018 mol.kg MLVSS-1.d(-1), so ethanol-type fermentation was optimal type for hydrogen production.