The impact of hematite on the anaerobic digestion of cattle manure

Authors : Yasin ODABAŞ, Yasemin Dilşad YILMAZEL

Pages : 70-78

Doi:10.31015/jaefs.2023.1.8

View : 12 | Download : 7

Publication Date : 2023-03-27

Article Type : Research Paper

Abstract :A metal-based conductive material, hematite insert ignore into journalissuearticles values(Fe 2 O 3 );, was used as an amendment in the anaerobic digestion process to determine the effects on the performance of anaerobic digestion of cattle manure insert ignore into journalissuearticles values(CM); at mesophilic temperature insert ignore into journalissuearticles values(35 0 C);. The first set of experiments insert ignore into journalissuearticles values(Set 1); was designed to assess whether there is a need to supplement nutrients for the effective digestion of CM. To this purpose, basal medium insert ignore into journalissuearticles values(BM); composed of macro nutrients, micro nutrients, reducing agent, and buffer was added to the reactors and a biochemical methane production assay was conducted. The presence of BM showed negative impacts on the anaerobic digestion of CM and its absence caused up to 40% higher methane production yield. In Set 2 experiments, the impact of hematite addition on methane production performance was determined. Two different dosages as 20 mM Fe insert ignore into journalissuearticles values(Fe20); and 50 mM Fe insert ignore into journalissuearticles values(Fe50); were applied to the batch reactors. Hematite amendments increased methane yield; at Fe20 insert ignore into journalissuearticles values(131 ± 2.6 mL CH4/g VS added ); the increase was around 8% and at Fe50 insert ignore into journalissuearticles values(135 ± mL 0.2 CH4/g VS added ); the increase was around 12% as compared to the control. Further, up to 36% increase in the methane production rate was calculated via Modified Gompertz fitting.
Keywords : Anaerobic digestion, Cattle manure, Methane production, Conductive materials, Hematite