Augmented biohydrogen production from rice mill wastewater through nano-metal oxides assisted dark fermentation

This study highlights biohydrogen production enrichment through NiO and CoO nanoparticles (NPs) inclusion to dark fermentation of rice mill wastewater using Clostridium beijerinckii DSM 791. (~26 nm) (~50 NPs were intrinsically prepared via facile hydrothermal method with polyhedral morphology high purity. Dosage dependency studies revealed the maximum characteristics for 1.5 mg/L concentration both NPs. Biohydrogen yield was improved by 2.09 1.9 folds higher optimum dosage respectively, compared control run without Co-metabolites analysis confirmed acetate butyrate pathways. Maximum COD reduction efficiencies 77.6% 69.5% observed inclusions which than (57.5%). Gompertz kinetic model fitted well experimental data assisted fermentation. Thus, seems be a promising technique augmented production.