The world-wide development of aquaculture
In 2014, the world fish supply reached 16.2 million tonnes, which represent 20kg of fish per person. It reached a new record, mostly due to the tremendous growth of aquaculture, which provides now almost half of the fish stock (73.8 million tonnes in 2014), while capture production is saturating since 1990.
Experts all agree that aquaculture will contribute significantly in the future to food security and adequate nutrition for a global population expected to reach 9.7 billion by 2050.
Intensive and closed aquaculture systems
Recirculation aquaculture systems (RAS) represent a new and unique way to farm fish. Instead of the traditional method of growing fish outdoors in open ponds, this system rears fish at high densities, in indoor tanks with a "controlled" environment. Recirculating systems filter and clean the water for recycling back through fish culture tanks.
RAS offer fish producers a variety of important advantages over open pond culture. These include a method to maximise production on a limited supply of water and land, nearly complete environmental control to maximise fish growth year-round, the flexibility to locate production facilities near large markets, complete and convenient harvesting, and quick and effective disease control.
Alternative renewable energy for aquaculture
One of the fundamental issues facing all of us today is proper management of our energy resources. The current generation has a responsibility to ensure that energy is used efficiently and with minimum impact on the environment.
As considerations of fuel diversity, market uncertainties and environmental concerns are increasingly factored into electric utility resource planning, renewable energy technologies are beginning to find their place in the utility resource portfolio.
Most countries in Southeast Asia, they are experiencing strong economic and population growth. Its energy demand is currently increasing by ten percent each year and the competition for land use is growing as a result.
Some scholars have proposed to reduce fuel energy by apply renewable green energy sources such as solar and wind power. Fossil-based fuels are less cost-effective than renewable energies; energy is of little concern for the majority of the industry, and renewable energies are of potential use in recirculating aquaculture systems (RAS). In this project, we also want to demonstrate that dual land use for aquaculture and photovoltaics can solve these systemic problems.
The electricity charge accounts for about 20-40 percent of the total production cost of aquaculture, and the average monthly electricity consumption is more than 2,000 kilowatt hours.
In view of this, as well as the advent of the era of high energy prices and the trend of energy saving and carbon reduction, it is necessary to encourage farmers to use highly efficient electrical appliances, and encourage farmers, fish and livestock to make good use of solar energy, wind power and other self-generating ways to reduce CO2 emissions.
The Aqua-PV greenhouse is 80L X 20W X 4.5H and the rooftop can install up to an incredible 720 solar panels; the generating power is about 407,808 kilowatts/year.
Read more, HERE.
The Aquaculturists
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