الفهرس 
APPROVAL SHEETOnly 14 pages are availabe for public view
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Abstract
Focusing on the production of energy from waste has great importance to solve the energy crisis and environmental pollution. Anaerobic digestion is considered one of the most important techniques to convert organic wastes into renewable energy in the form of methane byproduct. Studying how to improve biogas production is still an area of concern. This study investigated the simultaneous effects of Co3O4 NPs activated by halogen lamp on biogas and methane production from dry anaerobic co-digestion of livestock manure with cheese whey. The treatments were: mono-digestion of manure control), co-digestion of manure with whey (2:1), co-digestion of manure and whey (2:1) and 1,2 and 5 mg/L of photoactivated Co3O4 NPs, respectively under mesophilic conditions 37.5 °C. Photoactivated Co3O4 NPs enhanced and accelerated the dry anaerobic co-digestion process. The most effective concentration is 5mg/L which results in reducing the period of biogas production to 20 days and increasing the biogas yield and the methane yield 1777.40 mL biogas g-1 VS and 1098.54.