▎ 摘　　要

NOVELTY - A mixed sewage treatment agent comprises 10-20 pts. wt. dried grapefruit peel, 5-10 pts. wt. attapulgite, 8-15 pts. wt. dodecyl dimethyl benzyl ammonium chloride, 5-15 pts. wt. graphene, 5-10 pts. wt. polymeric ferric sulfate, 0.5-1 pts. wt. butyl acetate, 5-10 pts. wt. sodium carbonate, 5-10 pts. wt. sodium xylene sulfonate, 3-10 pts. wt. sodium tripolyphosphate, 2-8 pts. wt. tall oil fatty acid, 5-18 pts. wt. peracetic acid sterilization liquid, 2-5 pts. wt. lauryl betaine, 2-5 pts. wt. octadecyltrimethylammonium chloride and 10-15 pts. wt. fly ash. USE - Mixed sewage treatment agent (claimed). ADVANTAGE - The mixed sewage treatment agent can effectively reduce the heavy metal ions, chemical oxygen demand and suspended solids content in the sewage, is simple and economical to prepare, shortens the sewage treatment period, is free of toxic substances, has excellent decolorizing effect, and reduces the odor in treated water. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of mixed sewage treatment agent, which involves (a) weighing each raw materials, (b) uniformly mixing fly ash, attapulgite and sodium carbonate, placing the mixture in a muffle furnace, preheating at 200-400 degrees C for 10-20 minutes and calcining at 450-750 degrees C for 20-50 minutes, (c) grinding the calcined material, sieving, orderly adding lauryl betaine, graphene and polymeric ferric sulfate and uniformly stirring at 40-60 degrees C, (d) placing dried grapefruit peel in a crusher, crushing and sieving through a 100-150 mesh sieve to obtain grapefruit peel powder, (e) mixing the grapefruit peel powder with peracetic acid sterilization liquid, adding butyl acetate, sodium tripolyphosphate, tall oil fatty acid, octadecyltrimethylammonium chloride, sodium xylene sulfonate and dodecyl dimethyl benzyl ammonium chloride, uniformly stirring the mixture using a stirrer and leaving at 5-15 degrees C for 10-20 minutes, and (f) mixing the material obtained in the step (c) and material obtained in step (e) and ultrasonically oscillating the mixture for 5-10 minutes to obtain finished product.