NOVELTY - The aquaculture wastewater treatment system comprises a filter grille, a grit chamber, a solid-liquid separation tank, a large-scale biogas anaerobic tank, ammonia stripping tower, two-stage reaction tank, a sludge tank, and a biogas purification gas generator. The filter grille, the grit chamber, the solid-liquid separation tank, the large-scale biogas anaerobic tank, the ammonia stripping tower and two-stage reaction tank are connected to each other.    USE - Aquaculture wastewater treatment system for producing fertilizers for farming.    ADVANTAGE - The aquaculture wastewater treatment system facilitates better treatment of chemical oxygen demand, ammonia and other harmful pollutants in the aquaculture wastewater, and reduces environmental pollution in a reduced cost.    DETAILED DESCRIPTION - The aquaculture wastewater treatment system comprises a filter grille, a grit chamber, a solid-liquid separation tank, a large-scale biogas anaerobic tank, ammonia stripping tower, two-stage reaction tank, a sludge tank, and a biogas purification gas generator. The filter grille, the grit chamber, the solid-liquid separation tank, the large-scale biogas anaerobic tank, the ammonia stripping tower and two-stage reaction tank are connected to each other. The two-stage reaction tank is connected to the sewage mud pool, where the large-scale biogas anaerobic tank is connected to the biogas purification tank. An INDEPENDENT CLAIM is included for a method for processing aquaculture wastewater, which involves:    (A) passing aquaculture wastewater by filtration grit into pool grill;    (B) pumping the aquaculture wastewater into solid-liquid separation tank;    (C) treating fermentation broth in large-scale biogas anaerobic tank;    (D) passing ammonia into stripping tower fermentation liquid; and    (E) drying the formed sludge in fertilizer tank.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the aquaculture wastewater treatment system. (Drawing includes non-English language text).