Hydrogen energy is a clean source for liveliness better
than fossil fuel that has hazardous effects on the environment
and atmosphere. Food wastes and organics in the sewage sludge
are a promising sustainable and renewable source for hydrogen
production where amalgamation of waste treatment and energy
production would be more than one benefit expressed in
treatment of organic pollutants and energy generation.
Discovering biohydrogen production from industrial
wastewater by dark and photo fermentation was the main aim
of this paper. The biogas produced was composed of H2 and
CO2, and the maximum H2 content was 25.94%. This ratio was
achieved at batch configuration system and initial pH 6.2 with
starch concentration 15 g/l. Cause of using dark fermentation
effluent (DFE) was used as substrate for A Rhodobacter
capsulatus strain and a clostridium culture were cultivated to
produce hydrogen under different light-dark cycles. Acetic and
butyric acids decreased due to first and second photo stages by
21.9% and 4.1 % respectively. Maximum hydrogen yield was
470.9 ml H2/mol VFAs.