| Based on numerical simulation and engineering experience, the two-dimensional model was used to analyze the characteristics of aquaculture tailwater discharge in the sea area of Dajiao Bay, Hainan, and the optimal location of the discharge outlet was determined by combining environmental capacity, economy and discharge demand. The results show that the point setting of the discharge outlet is D9, and the tailwater discharge is upgraded on the basis of the primary restriction standard in Table 2 of the Aquaculture Tailwater Discharge Standard (DB46/475-2023), namely: Suspended matter concentration ≤22 mg/L, CODMn concentration ≤4.5 mg/L, inorganic nitrogen concentration ≤1.6 mg/L, active phosphate concentration ≤0.22 mg/L, the maximum emission is 200 000 m3/d, which can meet the shortterm (5 years) emission demand of the breeding park, and the long-term (10 years) discharge location is given. This study provides technical reference for the selection and setting of tailwater discharge outlet in aquaculture park, and supports the green and sustainable development of mariculture industry. |
