The Effect of Adding Corn Silage at Different Ratios to Orange and Tangerine Wastes on Biogas Production Efficiency

Metin Dağteki̇n,Ali Aybek,Serdar Üçok,Abdullah Beyaz

doi:10.15832/ankutbd.347918

Abstract

In this study, biogas production efficiencies of mixtures obtained by adding corn silage (CS) to citrus industrial wastes at different ratios were determined. Orange (OJPW) and tangerine processing juice wastes (TJPW) (crusts and shells) were selected as materials in the study. 25%, 50%, 75% of CS was added to these selected wastes. Changes in the obtained mixture chemical properties (dry matter, dry organic matter, crude ash, crude protein, crude oil, Acid Detergent Fiber (ADF), Neutral Detergent Fiber (NDF)), biogas production and methane content in the biogas were investigated. The results of the study showed that the highest crude protein content was found in 100% TJPW (10%), raw fat percentage in 100% TJPW (5.14%), dry matter content in 100% CS (93.56%), ADF in 100% CS (22.74%) and the NDF in a mixture of 25% OJPW + 75% CS (45.08%). The highest methane production was determined for a mixture of 100% TJPW and 50% TJPW + 50% OJPW (0.46 m3 kg-1 ODM). Also the highest biogas production was determined in a mixture of 50% OJPW + 50% TJPW (0.90 m3 kg-1 ODM). The mixing of CS in TJPW and OJPW reduced significantly the production of methane and biogas in the mixture. As a result of the statistical analysis, significant differences (P≤0.05) were found in both methane and biogas production of agricultural wastes.

Highlights

Today the gradual decrease of fossil fuel resources has increased the need for renewable energy sources (Üçok et al 2016)
Orange juice processing waste (OJPW) and tangerine juice processing waste (TJPW) in the form of pulp were selected as materials, and corn silage (CS) with a high biogas potential was selected as co-fermentation material
The highest cumulative specific methane and biogas production values were found in 100% TJPW, 100% orange juice processing waste (OJPW) and the mixture of 50% OJPW+50% TJPW, while the lowest such values were found in mixtures of OJPW and TJPW containing 75% CS, and 100% CS

Summary

Introduction

Today the gradual decrease of fossil fuel resources has increased the need for renewable energy sources (Üçok et al 2016). Due to its contribution to the sustainable development of countries, there is increasing interest in the energy obtained from biomass, especially biogas (Mansourpoor & Shariati 2012; Üçok et al 2016; Mojtaba & Ahmad 2012). There are significant problems in the export of products grown in recent years due to political and geopolitical problems among these countries, to which exports have been made. Most of these products can not be consumed due to excess supply in the domestic market (Çallı 2012)

Methods

Results

Conclusion