Improving efficiency of a microbial bioreactor for aquaponics

提高鱼菜共生微生物生物反应器的效率

• 批准号: 538488-2019
• 负责人: Stein, Lisa
• 金额: $ 1.82万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=680783
• 关键词: Improving; efficiency; microbial; bioreactor; aquaponics

NutraPonics Canada Corporation (NCC) operates a self-contained aquaponics system whereby water continuously circulates through a fish tank, a microbial bioreactor, and plant-growth beds. This integrated system enables plants to grow twice as fast relative to traditional farming. The microbial bioreactor produces an abundance of plant growth-promoting nutrients by decomposing fish waste. Principally, nitrifying microorganisms grown as biofilms on circulating plastic carriers within the bioreactor convert ammonia excreted by the fish into nitrate, which the plants readily absorb. To maximize and optimize the full potential of microorgansims within the aquaponics system, this proposal aims to: 1) identify microorganisms comprising the carrier biofilms in the bioreactor, those associated with fish gill tissues, and those associated with plant roots; 2) determine the rates of nitrogen conversions by the carrier biofilm microbial communities under variations of ammonium concentration, pH, and oxygen level; and 3) determine the greenhouse gas production and consumption potential (i.e. carbon dioxide, nitrous oxide, methane) of microbial communities within the bioreactor. This knowledge will inform the design, future improvements, and marketing of the company's aquaponics system. The data will allow for optimization of nitrogen use efficiency and other useful functions of microorganisms throughout the system, which will save the company time and resources as they upgrade and scale operations.

NutraPonics 加拿大公司 (NCC) 运营着一个独立的鱼菜共生系统，水通过鱼缸、微生物生物反应器和植物生长床不断循环。 该集成系统使植物的生长速度是传统农业的两倍。微生物生物反应器通过分解鱼类废物产生大量促进植物生长的营养物质。主要是，在生物反应器内循环塑料载体上生长为生物膜的硝化微生物将鱼排泄的氨转化为植物容易吸收的硝酸盐。为了最大化和优化鱼菜共生系统中微生物的全部潜力，该提案旨在：1）识别生物反应器中包含载体生物膜、与鱼鳃组织相关的微生物以及与植物根相关的微生物； 2) 确定载体生物膜微生物群落在铵浓度、pH 和氧水平变化下的氮转化率； 3) 确定生物反应器内微生物群落的温室气体产生和消耗潜力（即二氧化碳、一氧化二氮、甲烷）。这些知识将为公司鱼菜共生系统的设计、未来改进和营销提供信息。这些数据将允许优化整个系统中微生物的氮利用效率和其他有用功能，这将在公司升级和规模化运营时节省时间和资源。