▎ 摘　　要

NOVELTY - Sewage treatment agent comprises 10-30 wt.% plant fiber, 1-10 wt.% graphene, 5-20 wt.% nanomaterials, 1-10 wt.% activated carbon, 30-50 wt.% polymer resin, 5-20 wt.% dispersant and 10-35 wt.% organosilane. USE - The sewage treatment agent is used for papermaking and for industrial sewage treatment (claimed), urban sewage treatment and rural wastewater treatment. ADVANTAGE - The sewage treatment agent reduces total nitrogen, chemical oxygen demand, suspended solids, chroma and heavy metal ion content in wastewater, is economical, prevents agglomeration of graphene and nanomaterial, and reduces dosage and technical defects. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the sewage treatment agent involving (i) crushing and grinding coconut husk and other crop wastes to obtain plant fiber particles with a certain particle size, (ii) combining and adding 10-50 pts. wt. plant fiber particles, 1-20 pts. wt. nanomaterials, 1-15 pts. wt. activated carbon and 1-30 pts. wt. dispersant to 10-30 pts. wt. organosilane, adding 1-20 pts. wt. organic solvent, adjusting the stirring speed, and increasing the temperature, completing the reaction to obtain mixed solution (A), (iii) slowly adding 1-12 pts. wt. graphene, 1-15 pts. wt. nanomaterials and 5-15 pts. wt. organic solvent to 20-50 pts. wt. polymer binder, heating while adding, adjusting the speed, and uniformly stirring to obtain mixed solution (B) and (iv) slowly adding the mixed liquid (A) to the mixed liquid (B), adjusting the pH value, adjusting the stirring speed, and uniformly stirring to obtain the product; and #use of the sewage treatment agent for papermaking, where the treatment agent is applied to process industrial wastewater with a pH of 3-7.