Updated Apr 23, 2019



Part of University of Toronto

Field Evaluation of Passive Aeration System for Aquaculture

The innovation has no owner


Stage 2: Research & Development

Through more cost-effective, sustainable aeration, Curiositate is improving aquaculture pond water quality, which has the potential to increase fish yields, raise incomes, and improve food security in Bangladesh. With DIV funding, Curiositate is partnering with the BRAC fisheries program to install and refine of devices that use a new method of aeration that does not require electricity, has extremely low maintenance requirements, and can be widely and cheaply deployed. The method utilizes the thermal temperature differences of the aquaculture pond and induces convective water circulation by heating a portion of the bottom pond layer. The method relies on passive thermal collection plates and insulated heat transfer channels. Through this innovation, Curiositate is refining a clean energy innovation with the potential to enhance food security and improve yields throughout aquaculture in South and Southeast Asia.

Registered in Canada.

Focus Areas:

Agriculture and Aquaculture

Agriculture and AquacultureSEE LESS

Implemented In:


BangladeshSEE LESS

Country Implemented In
Verified Funding

Innovation Description

Curiositate developed an aeration method that doesn't require electricity, has few maintenance requirements, and is inexpensive to fabricate and deploy. The system uses heat that is captured through a solar thermal absorber plate and transferred to the bottom of the pond to heat the bottom water. The heated water will rise and mix the pond, spreading oxygen-rich water from the top through the entire depth of the pond, which can result in improved water quality and higher pond yields.
How does your innovation work?
Aquaculture is a large industry in many low income countries (LICs); fish farms account for about 5 percent of the GDP of Bangladesh. Improving the quality of aquaculture pond water has the potential to increase fish yields, raise incomes, and improve food security. In large aquaculture facilities, aeration has been shown to improve water quality and increase yields. However, aeration equipment is costly and requires electrical power inputs which can limit its use in LICs. Dissolved oxygen (DO) that is used by the fish is provided by photosynthesis, which is related to sunlight and takes place during daylight hours. The oxygen is produced at the pond surface and much oxygen is lost to the atmosphere. By circulating the water, more oxygen can be introduced. The system will allow for increased density of fish stock, higher yields of fish, as well as larger fish that have a higher market value and demand. Fish feed is also used more efficiently, which reduces feed and operation costs. The solution is an alternative to power-hungry aeration systems that consume a significant amount of energy and capital. For farmers not using aeration, the technology will provide all of the benefits described above. For farmers using aeration, replacing or supplementing existing devices can greatly decrease energy consumption for aquaculture.


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