▎ 摘　　要

NOVELTY - Preparing graphene carrier comprises (a) dispersing the powdered graphene oxide in water to obtain a graphene oxide suspension, (b) gradually dropping the oxidized graphene into the sodium alginate solution, stirring uniformly to obtain the precursor solution, (c) dripping the precursor solution into the solution of calcium chloride by a peristaltic pump to form a graphene gel beads and (d) solidifying and drying the graphene gel beads to obtain the product. USE - The graphene carrier is useful in an anaerobic ammonia oxidation reactor (claimed). ADVANTAGE - The graphene carrier: does not have nanomaterial loss; improves the utilization rate of nanomaterials; is expected to accelerate the film hanging time of the reactor; improves the biological activity of anammox, and promotes the growth of functional microorganisms, thus improving the denitrification efficiency of the reactor. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an anaerobic ammonia oxidation reactor based on graphene carrier.