Development of Biocalcium Production Process from Hybrid Catfish (Pangasianodon gigas × Pangasianodon hypophthalmus) Bone

Biocalcium from fish bones is a high quality of organic calcium product . The objective of this research was to develop a process for biocalcium production from hybrid catfish ( Pangasianodon gigas x Pangasianodon hypophthalmus ) bones including 4 steps : 1 ) high pressure water jet process 2 ) soaking in alkaline solution 3 ) ethanol immersion process 4 ) bleaching and grinding to obtain biocalcium powder . % Yield, chemical composition, color values, lipid oxidation and the microstructure of all processes of fish bone were analyzed . It found that obtained biocalcium had % yield of 14 . 46 %. In addition, bio - calcium had a low protein, fat and moisture contents but increasing in ash content and the lightness values ( L *) were observed ( p ≤ 0 . 05 ). However, the process of ethanol immersion, bleaching and grinding to obtain biocalcium powder decreased in Thiobarbituric acid-reactive substances (TBARS) values ( p ≤ 0 . 05 ) compared to the previous process . The particle sizes of biocalcium powder were in a range of 2 - 10 µm and distributed uniformly . Therefore, biocalcium production was suitable process to obtain a good quality biocalcium of fine powder, white color, without fishy and rancid odor . It can be developed as a calcium supplement . Keywords : biocalcium ; process ; fish bone ; hybrid catfish