Abstract:

The organic content of sludge is characterized by high-protein and low-fat，so the sludge can be used to produce protein solution，and then made into protein foaming agent. With the purpose of improving the foaming performance of the agent，twelve kinds of additives belonging to three main categories，inorganic，small，and large organic molecules were selected and their effects on the foaming performance of the protein solution were examined. By comparing the forming and stabilized bubbling performance，zinc sulfate，sugar and Arabic gum were the three kinds of additives which could significantly enhance the activity of protein molecules，increase liquid viscosity，or improve film strength，and improve the foaming performance of the protein solution.