Throughout history, it has been shown that hydroponic production of crops is a viable option for growers. Latest research shows that although hydroponically produced lettuce may require more energy compared to lettuce grown conventionally, hydroponics provide 11 times greater yields using 13 times less water (Barbosa, et al.).
Our towers utilize a fish waste water nutrient solution which eliminates inferior man made chemical fertilizers. Manual rotation of up to 16 plant carriers that carry a balanced load is easy to rotate with simple hand crank mechanical advantage to overcome inertia and slowly move the twin belts that carry the separated plant carriers. The operator simply stops turning the crank to enable manual checking twice a day to insure plants are properly fed and in some cases trimmed for repeat cuttings to order. The plant roots are not encouraged to anticipate drought conditions with need to penetrate deep into soil, as there is none! But, as long as the roots are able to supply adequate food and moisture the Sun or LED lighting works with the plant leaves to assure healthy growth.
Aquaponics is a farming technique that produces both plants and fish. The fish are fed a high nutrient food and their liquid only waste is then used to feed plants. This eliminates the need for chemical based nutrients. The major players that can make or break an aquaponic system are bacteria. Fish waste water contains nitrogen in a form that is unusable to plants. Different types of bacteria naturally accumulate in systems and aid in the transformation of ammonia to nitrites (both of which are unusable to plants), and nitrites to nitrates, which can be taken up by plant roots. The nutrients in the water are taken up by plants and the filtered water returns to the fish. Our custom designed fish tanks separates the initially incompatible solid waste that sinks away from the bio-filtered liquid waste that plants love and grow very well with limited roots if all else needed is constantly available in our controlled environment.
In Northern temperate latitudes, seasonal cold weather stops all outdoor plant growing; but our insulated tower enclosures are both integrated and secured against wind and snow with unique natural gas heating that avoids snow build up on arched clear roof coverings on two levels.
The time between harvest and consumption varies between five days to several weeks, if refrigeration is employed. A notable consequence of consuming produce that has traveled quite a distance is that the nutritional content of the produce degrades over time and with handling (Barrett).
The tower operating in Benzona, MI uses the cut-and-come-again method of harvesting leafy greens. This means a plant is kept alive longer and periodically trimmed of leaves. This allows us to provide the unique service of harvesting upon order, with pick-up scheduled within hours to deliver the freshest greens possible.
For more than two decades, there has been a rise in long-distance transportation of food. In the U.S. fruits and vegetables are transported between 1,500-2,500 miles from the farm to the store or market (Halweil). While this offers consumers a wide diversity of ingredient options, it comes at a cost of fossil fuel consumption and environmental impacts.
The NRDC publication on Food Miles has found that eating locally can provide several benefits:
To read about what you can do to help limit greenhouse gas emissions and eat healthily, see the article Food Miles.
Sky-High Aquaponic towers are designed to operate in various locations, inside or outdoors. This allows many people to become farmers for themselves and their neighbors. Being able to grow food where the consumers are located is the best way to provide food with the least amount of transportation time and expense. No inorganic technology ever touches our produce!
Land is becoming more expensive especially closer to populations of eaters, and distant farmland is disappearing. The introduction of indoor agriculture, or controlled environment agriculture, has allowed the most efficient control over all necessary resources for plant growth and development. Being able to utilize vertical space gives you the ability to increase production without having to use more floor space, and controlled environment yields multiple harvests with no delay between harvesting and replacing with new seedlings already growing before they get to the tower to mature.
The tower's rotation satisfies two needs, nutrient solution delivery and aeration for plant roots, and allows workers to keep their feet safely on the ground minimizing the need to bend and work in otherwise uncomfortable positions associated with tending to garden crops. No climbing ladders as we bring the plants to you!
The tower system design allows effective sharing of resources that would otherwise substantially increase the amount of energy needed. If the growing area (which is 130 sf on this model) were spread out over floor space, it would require a much larger area to accommodate room for moving about and accessing plants for harvesting. Also, the amount of light fixtures needed would increase by 50%. Having one shared nutrient reservoir saves energy and need for many water and air pumps or sophisticated plumbing. If all grow beds were vertically stacked, they would need as many resources as if grown across the floor including scissor lifts or ladders.
The model of tower in operation in Benzonia is 12' tall. It effectively increases the production of the space it takes up by THREE TIMES before considering multiple harvests per year! We anticipate many more towers in the same location.
Barbosa, Guilherme, Francisca Gadelha, Natalya Kublik, Alan Proctor, Lucas Reichelm, Emily Weissinger, Gregory Wohlleb, and Rolf Halden. "Comparison of Land, Water, and Energy Requirements of Lettuce Grown Using Hydroponic vs. Conventional Agricultural Methods." International Journal of Environmental Research and Public Health IJERPH 12.6 (2015): 6879-891. Web.
Barrett, Diane M. "Maximizing the Nutritional Value of Fruits and Vegetables." University of California, Davis, n.d. Web. 6 July 2016.
Halweil, Brian, and Tom Prugh. Home Grown: The Case for Local Food in a Global Market. Washington, DC: Worldwatch Institute, 2002. Print.
"NRDC: Food Miles: How Far Your Food Travels Has Serious ..." N.p., n.d. Web.