Discharge Distribution and Quality of Tail Water for Mariculture in Tianjin

• 作者: Daiyan WEI Jiahong LIU Xiaoming CHEN Meng SUN
• 来源期刊: 农业生物技术:英文版
• 学科: 地球科学
• 关键词: POND FACTORY MARICULTURE POLLUTANTS Evaluation
• 年，卷（期）: 2021,（1）
• 页码范围: 53-58
• 页数: 6页
• 分类号: P73

摘要

[Objectives] This study was conducted to understand the pollution load of mariculture in Tianjin. [Methods] The tail water discharged by the main mariculture methods in Tianjin was monitored, and the tail water quality was evaluated. According to the aquaculture area and distribution and the discharge destination of the aquaculture tail water, a preliminary evaluation of the pollutant discharge situation was carried out, and different aquaculture methods were compared and analyzed for the differences in discharged pollutants. [Results] The main pollution factors in pond mariculture were chemical oxygen demand(CODMn), active phosphate and total phosphorus. The main pollution factors in factory mariculture were inorganic nitrogen, active phosphate and total nitrogen. Pond mariculture showed higher up-to-standard rates of inorganic nitrogen and active phosphate contents and lower up-to-standard rates of suspended solids, CODMn, and total phosphorus content than factory mariculture, and the up-to-standard rates of total nitrogen and total phosphorus contents in the flowing water type of factory mariculture were higher than those in the circulating water type. The discharge of pond mariculture was less than factory mariculture, and mariculture had the greatest impact on Fuzhuang Drainage Canal in that 92.3% of the total pollutant discharge monitored went to Fuzhuang Drainage Canal. The circulating water type could reduce pollutant discharge compared with the flowing water type of factory mariculture. [Conclusions] This study proposed countermeasures and suggestions for reducing pollution from marineculture.