Chrome Tanned Leather Waste Dechroming Optimization for Potential Poultry Feed Additive Source: A Waste to Resources Approach of Feed for Future

In this study chrome tanned leather waste dechroming optimization for potential poultry feed additive source were investigated. Recovery of chrome waste would have environmental and economic benefits and, in this study, the possible application of tannery solid waste as poultry feedstuff additive for poultry growers is investigated. A structured questionnaire was used to collect chrome shaving and got good information about the waste. The elemental analysis of chromium in chrome shaving is around 5.6 mg/kg which satisfies the requirement of poultry feed. The Dechroming rate of 94.82% was achieved for the sample four after treatment by using different chemicals. The higher gelatin solution was 57% w/w in sample four dechromed powder that obtained in the 85-95 °C temperature range. Thermal treatment was used to obtain soluble protein (gelatin) and resulted in a gelatin powder product after drying at 105 °C. The amino acid composition in the isolated protein concentrate was better than the poultry feed such as soybean and wheat. Scanning electron microscope and differential scanning calorimeter were used to analyze the fiber structure and the hydrothermal stability of samples.