Abstract—In order to make effective use of the processing waste of scallops as resources such as fertilizer and feed, a simple and low cost method was developed to remove cadmium (Cd) of hazardous metal. The waste was treated with 1%, 2% or 4% citric acid, acetic acid or water respectively, then the concentration of cadmium in the waste was compared. At the same time, the effect of cadmium on the adsorption and washing liquid was discussed. The results are as follows: 1, the Cd concentration in the waste decreased after citric acid, acetic acid and water washing treatment, the best washing condition is 4% citric acid and double weight water which can make the concentration of Cd decreased from 5.95mg / kg to 1.22mg/kg. 2, The eggshell had ability to adsorb the Cd, the Cd concentration in citric acid washing liquid decreased from 2.22 mg/kg to 0.39 mg/kg. The effect of eggshell adsorption on the washing liquid treated by 4% citric acid and double weight water was significant. The method has the advantages of simple operation, convenient operation, low cost and good application.
 

Index Terms—scallop, waste, cadmium, washing, eggshell

Cite: Weijie Mao, Goro Akimitsu, and Huifeng Ren, "Study on a Simple Method Removing Cd from Scallop Processing Waste," International Journal of Food Engineering, Vol. 4, No. 1, pp. 32-35, March 2018. doi: 10.18178/ijfe.4.1.32-35