| 刊名 | Agricultural Biotechnology |
| 作者 | Liangbao TAO1, Xiaoming YE2, Ruyi WANG2, Yanfeng LIN3, Xiang LI4, Zeneng WEI5 |
| 作者单位 | 1. Agricultural Comprehensive Law Enforcement Brigade, Qingyang County Agriculture and Rural Affairs Bureau, Qingyang 247101, China; 2. Hefei Wankang Fisheries Technology Co., Ltd., Hefei 230031, China; 3. Fisheries Station of Xiuning County, Xiuning 245401, China; 4. Anhui Xijia Agricultural Development Co., Ltd., Bengbu 233000, China; 5. General Station of Fisheries Technology Extension of Anhui Province, Hefei 230601, China |
| DOI | DOI:10.19759/j.cnki.2164-4993.2026.03.014 |
| 年份 | 2026 |
| 刊期 | 3 |
| 页码 | 72-77 |
| 关键词 | Greenhouse soft-shelled turtle; Aquaculture tailwater; Integrated purification; Chemical-biological coupling; Resource utilization |
| 摘要 | Between July and August 2023, juvenile soft-shelled turtles were stocked at a density of 60 individuals/m2 in the Yangcun Soft-Shelled Turtle Breeding Base operated by Anhui Xijia Agricultural Development Co., Ltd., amounting to a total of 3.3 million juveniles. A specialized powdered feed containing 42%–46% protein was utilized, which was processed into soft pellets for feeding. The pellet size was adjusted in accordance with the turtles’ growth stages. By May to June 2024, the annual commercial turtle yield reached 1.3 million kg, accompanied by an annual tailwater discharge exceeding 50 million m3. Analysis of the tailwater revealed concentrations of ammonia nitrogen (NH3-N) at 30.9 mg/L, nitrite nitrogen (NO2⁻-N) at 7.3 mg/L, suspended solids (SS) at 363.7 mg/L, and chemical oxygen demand (COD) at 151.7 mg/L. This study investigated and optimized the design of an integrated purification system for soft-shelled turtle aquaculture tailwater, based on the municipal wastewater anaerobic-anoxic-oxic (A²/O) process. The system combined chemical flocculation, multi-stage biological treatment, the A²/O process, and advanced filtration using zeolite and activated carbon. The engineering application demonstrated that the purification system occupied an area of 200 m² and treated 200 t of tailwater per day. The effluent concentrations were as follows: TN at (4.9 ± 0.7) mg/L, TP at (0.26 ± 0.16) mg/L, SS at (26 ± 5.3) mg/L, and COD at (11.4 ± 2.1) mg/L. The corresponding pollutant removal efficiencies were 98.1%, 99.8%, 91.2%, and 92.2%, respectively. The effluent quality complied with and surpassed the Class II limits outlined in the Discharge Standard of Water Pollutants for Aquaculture in Anhui Province. The treatment cost of water amounted to 2.08 yuan/t, and annual reductions of 8.89 t of TN and 3.9 t of TP were achieved. The system demonstrated robust resistance to load fluctuations, and its modular design facilitated rapid installation and efficient operation within aquaculture facilities. |
