Abstract: A method for extracting chondroitin sulfate from eggshell membrane is disclosed in the present disclosure, belonging to the technical field of biochemical agents. The method for extracting chondroitin sulfate from eggshell membrane includes following steps: adding a mixed reagent into ultramicro-pulverized eggshell membrane, followed by water bath extraction; and centrifuging an extractive solution to obtain the chondroitin sulfate; the mixed reagent includes an alkali reagent and a salt reagent, and an alkali-salt ratio of the alkali reagent and the salt reagent is (3-7) mL:1 mL; the material-liquid ratio of the mixed reagent to the ultramicro-pulverized eggshell membrane is 1 g:(13-17) mL.

Abstract: Water conservancy construction sewage treatment mechanism, including a support mounting cylinder, where a variable-diameter sedimentation cylinder is arranged at one end of the support mounting cylinder, one half of the cylinder wall of the support mounting cylinder is a thin wall and the other half is a thick wall, and the thin wall and the thick wall are disposed oppositely. The water conservancy construction sewage treatment mechanism also includes: a variable-diameter diversion cylinder, which is arranged on the thin wall at the other end of the support mounting cylinder; several displacement diversion modules, which are arranged on the thick wall of the support mounting cylinder and include guide displacement structures and combined diversion structures; and a magnetic attraction displacement adjusting structure, which is arranged on the outer side of the thick wall of the support mounting cylinder and is matched with the guide displacement structures and the combined diversion structures.