The study of recirculating aquaculture system in pond and its purification effect

7th International Conference on Environment and Industrial Innovation

生态环境科学;工业技术

Qu, Jiangqi^1 ; Zhang, Qingjing^1 ; Jia, Chengxia^1 ; Liu, Pan^1 ; Yang, Mu^1

Department of Fisheries Ecology and Environmental, Beijing Key Laboratory of Fishery Biotechnology, Beijing Fisheries Research Institute, Beijing

100068, China^1

关键词: Ecological floating beds;    Fresh water resources;    High-density cultures;    Microbial communities;    Purification effect;    Purification systems;    Recirculating aquaculture system;    Water quality parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/67/1/012028/pdf
DOI  :  10.1088/1755-1315/67/1/012028

来源: IOP

【 摘 要 】

In this paper, a recirculating aquaculture purification system (RAPS) was designed to solve the problems of aquaculture pollution and shortage of freshwater resource according to the characteristic of northern freshwater ponds of China. The system were arranged in series and composed of high density culture pond, deposit pond, floating and submerged plant pond, ecological floating bed pond and biofilm filtrate pond. At the fish density of 20∼30kg/m3in the high density culture pond, the water quality parameters were monitored seasonally. The results indicated that the removal rate of total nitrogen, total phosphorus, ammonia nitrogen and nitrite nitrogen in the recirculating aquaculture system were 69.59%, 77.89%, 72.54% and 68.68%, respectively. The floating and submerged plant pond and ecological floating bed pond can remove TN and TP obviously, and increase dissolved oxygen and transparency significantly. And the biofilm filtrate pond has good effect of removing ammonium nitrogen and nitrite nitrogen, meanwhile, the microbial communities in the recirculating aquaculture system regulate on the water quality. Therefore, the RAPS show significant effects on water saving and pollution emission reducing.