Physicochemical Characteristics of Freshwater Mussel (Pilsbryoconcha sp.) Shell from Sungai Paku Village Riau Province Indonesia

Freshwater mussel (Pilsbryoconcha sp.) shell is an untapped solid waste. Information about its nutritional value is necessary to investigate. Therefore, this research aimed to determine the physicochemical characteristics of freshwater mussel shell flour from Sungai Paku Riau Province Indonesia. The freshwater mussel shell was taken from Sungai Paku village. The sample preparation of freshwater mussel shell was made into flour and analyzed for physical characteristics (a yield, water absorption, whiteness degree) and chemically analyzed (moisture, ash, fat, protein, carbohydrate, crude fiber, and calcium content). Based on physical characteristics the freshwater mussel shell flour contained a yield 58%, water absorption 1.67%, whiteness degree 35.49% (L*=35.81, a*=2.66, b*=5.86), meanwhile based on chemical characteristics the freshwater mussel shell contained moisture, ash, fat, protein, carbohydrate (by difference), crude fiber, and calcium content was 0.41%, 93.01%, 0.18%, 3.44%, 2.97, 1.89%, 61.39%, respectively. It was found that the freshwater mussel shell from Sungai Paku, Riau contained the nutritional value, especially high in calcium content.