초록
Comprehensive experiments were designed to study the relative function of two bioreactor configurations viz., biofilm and suspended growth for dark-fermentative hydrogen (H<SUB>2</SUB>) production along with wastewater treatment at two varying feed pH conditions (6 and 7). Both the reactors were operated in sequencing batch mode using anaerobic inoculum after pretreatment (combined treatment: acid-shock, heat-shock and chemical-shock). Biofilm system showed efficient H<SUB>2</SUB> production over the corresponding suspended growth operation at feeding pH 6. VFA profiles visualized high acetate fraction supporting feasible microenvironment for higher H<SUB>2</SUB> production. Voltammogram profiles visualized significant variation in the bio-electrochemical behavior with the function of operating pH and reactor configuration. It can be inferred from this study that biofilm systems are efficient for H<SUB>2</SUB> production particularly at acidiophilic microenvironment.