The Effects of Nanoparticles- Zerovalent Iron on Sustainable Biomethane Production through Co-Digestion of Olive Mill Wastewater and Chicken Manure

The impacts of nanoparticles-zerovalent iron (NP-ZVI) on anaerobic co-digestion (AcoD) were assessed. production biogas and methane (CH4), as well the removal efficiency volatile solids (VS) contaminants investigated in AcoD chicken manure (CM) olive mill wastewater (OMWW) with addition NP-ZVI at different concentrations (10–50 mg/g VS) sizes resulting from various mixing volume ratios (MVR) NaBH4:FeSO4.7H2O. results show that ? 30 VS MVR-2:1, MVR-4:1, MVR-6:1 improves AcoD. In contrast to 40–50 NP-ZVI, which caused an inhibitory impact all stages, a decrease contaminant’s efficiency, concentration 10–30 mg NP-ZVI/g MVR-4:1 achieved maximum improvement CH4 by 21.09%, 20.32%, 22.87%, respectively, improved 48.14%, 55.0%, 80.09%, vs. 0 additives. Supplementing resulted enhancement contaminant total oxygen demand (TCOD) up 73.99%, turbidity 79.07%, color 53.41%, solid (TS) 59.57%, 74.42%. It also hydrolysis acidification percentages 86.67% 51.3%, respectively.