海水人工湿地对梭鱼室内越冬养殖废水的净化效果

为开发海水低温环境下人工湿地在水产养殖上的应用,研究人工湿地在海水环境下对梭鱼亲本室内越冬养殖废水的处理效果和净化效能。海水(16.8‰~19.6‰)人工湿地对室内越冬养殖废水的净化效果:总凯氏氮去除率为13.4%,总氨氮为32.1%,亚硝氮为33.1%,浊度为55.1%,COD为35.6%,总磷为34.6%。越冬期间养殖池水质稳定。低温对总凯氏氮和三态氮的去除率有一定影响,并制约人工湿地脱氮过程;对浊度、COD、总磷去除率影响并不明显。海水人工湿地能维持连续运转并保持越冬养殖池的水质稳定。养殖负载量、越冬期间水力负荷尚有提升空间。

Effects of purification of wastewater from indoor recirculating overwinter Chelon haematocheilus aquaculture system in seawater constructed wetland

To develop constructed wetland in the application of aquaculture under condition of seawater and low temperature, the purification effects of Chelon haematocheilus parents in the indoor recirculating overwinter aquaculture system combined with seawater wastewater constructed wetland were investigated. The results showed that the removal rates of total Kjeldahl nitrogen, total ammonia nitrogen, nitrite nitrogen, turbidity, chemical oxygen demand and total phosphorous in system were 13.4%, 32.1%, 33.1%, 55.1% , 35.6%, and 34.6%, respectively. Various water quality parameters in the culture tanks were stable. Low temperature had a certain influence on the removal rate of total Kjeldahl nitrogen, total ammonia nitrogen, nitrite nitrogen, and nitrate nitrogen, which restricted denitrification process in the constructed wetland. Low temperature had unconspicuous influence on the removal rate of turbidity, chemical oxygen demand, and total phosphorus. Seawater constructed wetland can handle wastewater from the recirculating overwinter aquaculture system continuously, and keep water quality in the culture tanks stable. There is more potential to improve aquaculture load and hydraulic loading rate during overwinter aquaculture.