The Applied Research On Using A Fluid Contain Copper,Zinc Or Iron For Pidan Processing

1. The waster of Pidan industry can be reused. This research builds an elementary model op recycle of the waster and tests the model. The result indicates that the model is simple, effective and easy to operate.2. CuSO4 5H2O is the best substitute of PbO. ZnSO4 7H2O also can be used to product Pidan. However, FeSO4 7H2O is not a useful material.3. A mixed fluid is used to process duck eggs for Pidan. This fluid can dissolve ten times more metal than water. The concentration of copper and zinc in this fluid is much more higher then iron, this is why FeSO4 7H2O can not be used to process Pidan. Metal dissolving at first in the fluid settles so concentration of metal decreases along with processing procedure. Copper concentration in fluid decreases more and smoothlier than zinc or iron.4. Copper can prevent significantly the OH- in fluid from entering inside of eggs, yet accelerating the OH- in fluid go into duck is cardinal function of zinc. Wherefore the OH" concentration in zinc-only fluid decreases more than that in copper-only fluid.5. Unlike zinc or iron, when use CuSO4 ?H2O as an ingredient, less OH" enter duck eggs in processing procedure so pH in eggs is lower, too. Additionally, pH in eggs processed in copper-only fluid decreases along with the increasing of proportion of copper in the fluid. By the contrary, pH in eggs processed in zinc-only fluid increases along with the increasing of proportion of zinc. In all conditions pH in eggs increase along with processing procedure.6. In the first month, copper concentration in eggs decease, but zinc concentration decrease at first and than increase. Both two in eggs decrease by processing. In all conditions metal concentration in eggs increases along with the increasing of proportion of metal in the fluid.