Study on processing technology of superfine plaice bone paste

Superfine fish bone paste was prepared by using wet superfine grinding. The grinding parameters of superfine bone paste were investigated to provide reference to the high-value processing and utilization of fish bone. The results showed that the particle size, sensory quality, temperature and cadmium solubility of fish bone paste were influenced by method, grinding times, and the addition of ice water. With the higher degree of grinding, the particle size of fish bone paste became smaller, while the cadmium solubility increased. The optimum grinding parameters were as follows:the crude paste was complex with 3-fold volume ice water when grinded by colloid mill. Then, the fine paste was complex with 5-fold volume ice water and superfine grinded for 2 times to make superfine bone paste. Finally, 100 mesh size of superfine bone paste were obtained and the yield was 60.57%. The last superfine fish bone paste concluded a higher content of protein and lower fats, and the ratio of calcium and phosphorus was close to 2:1, indicating the fish bone paste had a rich and balanced nutrient value. Meanwhile, the total colonies number and TVB-N value of superfine bone paste met the demand of the relevant standards.