(credit to: http://www.verticalfarm.com )
Problem Statement
By the year 2050, nearly 80% of the earths population will reside in urban centers. Applying the most conservative estimates to current demographic trends, the human population will increase by about 3 billion people during the interim. An estimated 109 hectares of new land (about 20% more land than is represented by the country of Brazil) will be needed to grow enough food to feed them, if traditional farming practices continue as they are practiced today. At present, throughout the world, over 80% of the land that is suitable for raising crops is in use (sources: FAO and NASA).
Potential Solution
The concept of indoor farming is not new, since hothouse production of tomatoes, a wide variety of herbs, and other produce has been in vogue for some time. What is new is the urgent need to scale up this technology to accommodate another 3 billion people. An entirely new approach to indoor farming must be invented, employing cutting edge technologies. The Vertical Farm must be efficient (cheap to construct and safe to operate). Vertical farms, many stories high, will be situated in the heart of the worlds urban centers. If successfully implemented, they offer the promise of urban renewal, sustainable production of a safe and varied food supply (year-round crop production), and the eventual repair of ecosystems that have been sacrificed for horizontal farming.
Vertical Farms Advantages
- Year-round crop production; 1 indoor acre is equivalent to 4-6 outdoor acres or more, depending upon the crop (e.g., strawberries: 1 indoor acre = 30 outdoor acres)
- No weather-related crop failures due to droughts, floods, pests
- All VF food is grown organically: no herbicides, pesticides, or fertilizers
- VF virtually eliminates agricultural runoff by recycling black water
- VF returns farmland to nature, restoring ecosystem functions and services
- VF greatly reduces the incidence of many infectious diseases that are acquired at the agricultural interface
- VF converts black and gray water into potable water by collecting the water of evapotranspiration
- VF adds energy back to the grid via methane generation from composting non-edible parts of plants and animals
- VF dramatically reduces fossil fuel use (no tractors, plows, shipping.)
- VF converts abandoned urban properties into food production centers
- VF creates sustainable environments for urban centers
- VF creates new employment opportunities
- We cannot go to the moon, Mars, or beyond without first learning to farm indoors on earth
- VF may prove to be useful for integrating into refugee camps
- VF offers the promise of measurable economic improvement for tropical and subtropical LDCs. If this should prove to be the case, then VF may be a catalyst in helping to reduce or even reverse the population growth of LDCs as they adopt urban agriculture as a strategy for sustainable food production.
- VF could reduce the incidence of armed conflict over natural resources, such as water and land for agriculture
Vertical Farms Designs
Courtesy of: http://archdezart.com/2011/09/25/loft-london-farm-tower-competition/
Courtesy of: http://axisoflogic.com/artman/publish/Article_59707.shtml
Courtesy of: http://www.inspirationgreen.com/vertical-farms.html
Comment:
Farm Towers are nicely suited for Aquaponics system. The fish tanks would be located on the ground floor since it is where the sunlight is most deficient. The hydroponics will then occupy all the floors above it. Using minimal pumps, the water flow would be highly energy efficient since it travels back to the fish tank using gravity. In addition to that, the tower could also be energy independent if renewable energy sources such as wind and solar are tapped.
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