多功能生态塘对高密度水产养殖尾水的净化效果

Purification effect of multi-functional ecological pond on tail water from high density aquaculture

为实现高密度养殖尾水的高效净化和循环利用,选择由具有弹性填料的接触氧化塘、稳定塘和沉水涵养塘耦合的多功能生态塘,对高密度水产养殖尾水的净化效果进行研究。结果表明,当接触氧化塘填料生物膜挂膜成熟后,当养鱼塘尾水(总氮浓度为6.84~13.98 mg/L,总磷浓度为0.92~6.52 mg/L)与多功能生态塘之间水体交换量处于6.25%~37.50%时,耦合的多功能生态塘对高密度养殖尾水的总氮、总磷、硝态氮、亚硝态氮和氨态氮均有良好的去除效果,净化后水体亚硝态氮和氨态氮浓度均低于中国渔业养殖水标准值0.12 mg/L和0.02 mg/L,可循环至养鱼池再利用。因此,本研究耦合的多功能生态塘可达到改善水源水质,高效净化养殖尾水并循环利用的目的,对中国养殖业的可持续发展和水资源高效利用具有积极意义。

To achieve efficient purification and recycling of tail water from high density aquaculture,multi-functional ecological pond which was consisted of biological contact oxidation pond,stable pond and standing pond was used,and the purilication effect w-as studied.The results show-ed that total nitrogen(TN)and total phosphorus(TP)concentration of tail w-ater from fish pond was in the range of6.84-13.98mg/L and0.92-6.52m g/L,respectively.When the exchange amount of water between the fish pond and the multi-functional ecological pond ranged from6.25%to37.50%,the coupled multi-functional ecological pond had good removal effects for the TN,T P,NO3-N,N〇2-N and ammonia nitrogen in tail w,ater.Moreover,the concentrations of N〇2-N and a^mnonia nitrogen in the w-ater w-ere low-er than the standard value(0.12mg/L and0.02mg/L)of fisher^^aquaculture w-ater qualit^^in China after purification,and the purified w-ater w-as recycled to the fish pond for reutilization.Therefore,the multi-functional ecological pond had the ability of improving the water quality of high density aquaculture,and had great significance to the sustainable development of aquaculture industry and the efficient utilization of water resources.