Process for producing hydrogen by alga in alternating light/dark cycle.

摘要

Hydrogen is biologically, effectively produced by an alga in an alternating light/dark cycle which comprises alternating a step vor cultivating the alga in water under light 'aerobic conditions to accumulate photosynthetic products in the alga and a step for cultivating the alga in water under dark microaerobic conditions to decompose accumulated material by photosynthesis to evolve hydrogen.