Increasing nitrification efficiency of an aquaponic system to cultivate cold water fish in Canada

提高加拿大冷水鱼鱼菜共生系统的硝化效率

• 批准号: 531484-2018
• 负责人: Qi, Zhiming
• 金额: $ 1.8万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=662756
• 关键词: Increasing; nitrification; efficiency; aquaponic; system

In this project, an aquaponics system purchased from U.S. will be improved to increase nitrification efficiency**for the cultivation of cold water fish in Montreal area, Canada. This aquaponic system is environmental**friendly without releasing any fish wastewater which is fully utilized by the plants in a separate hydroponic**tank. However, the existing aquaponic facility is mainly produced in the United States for warm water fish (i.e.**tilapia) at approximately 25 °C. The Aqua Bord-du-lac, a local company based in Montreal area, plans to**adopt this system for cold water fish (i.e. trout) cultivation in Canada. Two sets of aquaponic facilities were**purchased by Aqua Bord-du-lac and the experiment has started in January 2018.**Preliminary results has shown that the water temperature for cold water fish has to be controlled below 16**°C under which the ammonium produced by the fish can not be efficiently converted to nitrate. Ammonium**is toxic to fish and has caused death of fish. The biofilter of the equipment does not function well in converting**ammonium to nitrate under this cold temperature. Therefore the objective of this research is to improve the**nitrification efficiency of this aquaponic system for cold water fish cultivation.**The improvement of this system would first benefit the business of the Montreal local producer Aqua**Bord-du-lac who plans to invest million dollars to expand this aquaponic industry. It would also secondly**benefit the aquaculture industry in Canada for in-door cold water cultivation. This closed system would also**significant contribute to environmental protection in Canada.**Our research group consists of Dr. Zhiming Qi, Associate Professor at McGill specialized in water quality**management, and a Ph.D. student, Kevin Kelly, a Postdoctoral Research Associate Dr. Qianjing Jiang.

在该项目中，将改进从美国购买的鱼菜共生系统，以提高加拿大蒙特利尔地区冷水鱼养殖的硝化效率**。这种鱼菜共生系统对环境无害，不会释放任何鱼类废水，并在单独的水培罐中被植物充分利用。然而，现有的鱼菜共生设施主要是在美国生产约25℃的温水鱼（即**罗非鱼）。 Aqua Bord-du-lac 是一家位于蒙特利尔地区的当地公司，计划**采用该系统在加拿大进行冷水鱼（即鳟鱼）养殖。 Aqua Bord-du-lac购买了两套鱼菜共生设施，并于2018年1月开始实验。**初步结果表明，冷水鱼的水温必须控制在16**℃以下，否则鱼产生的铵不能有效转化为硝酸盐。铵**对鱼类有毒并导致鱼类死亡。在如此寒冷的温度下，设备的生物过滤器不能很好地将**铵转化为硝酸盐。因此，本研究的目的是提高用于冷水鱼类养殖的鱼菜共生系统的硝化效率。**该系统的改进将首先使蒙特利尔当地生产商 Aqua**Bord-du-lac 的业务受益，他们计划投资数百万美元来扩大鱼菜共生产业。其次**还有利于加拿大室内冷水养殖的水产养殖业。这个封闭系统也将为加拿大的环境保护做出重大贡献。**我们的研究小组由麦吉尔大学水质管理副教授齐志明博士和博士组成。学生凯文·凯利（Kevin Kelly），博士后研究员蒋钱静博士。