Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Fresh city tomatoes, any time

01.02.2012
Why not produce lettuce, beans and tomatoes where most of the consumers are to be found: in the city? The flat roofs of many buildings are well-suited for growing vegetables. Rooftop greenhouses can also make use of a building‘s waste heat and cleaned waste water.

What could be fresher? On his way home from the office, the computer scientist harvests tomatoes from his company‘s rooftop greenhouse. The plants growing there thrive on the building‘s purified waste water and waste heat. Plantation systems such as this are still unheard-of in Germany. But they may make their debut soon: “In our inFarming project – which is short for ‘integrated farming‘ – we are developing solutions that can be speedily implemented for the urban landscape.

Our goal is to grow vegetables atop existing buildings,“ certified engineer Volkmar Keuter, project manager at the Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT in Oberhausen, explains. Actually, there are many varieties of plants suitable for growing on city farms. “Along with vegetables and fruit, we also want to look into growing plants that produce active ingredients for medications.“

The benefits: reducing the area required for agriculture, almost no transportation costs and, as a result, lower emissions - not to mention the boost in freshness when the tomatoes grow right on the consumer‘s roof. Waste heat from buildings and additional solar modules would be enough to supply the greenhouses with the energy they need. Semi-transparent solar cells are ideally suited for the purpose because they do not rob the plants of the light they need to grow. Water consumption is minimal, too: in a self-contained system, water used for the plants is circulated back, cleaned and reused.

Multifunctional microsieves and photocatalytic and thus self-cleaning coatings keep the water quality high. Nutrients for the plants can even be filtered out of rainwater and waste water. “Our concept relies on hydroponic systems or hydrocultures. A thin, controlled film of water is all it takes for plants to absorb needed nutrients. The advantage: the yield is ten times higher, and soil is too heavy for many building roofs. That is why we are working on systems to supply plants with nutrients,“ the researcher reports.

In Germany there are around 1,200 million square meters‘ worth of flat-roofed, non-residential buildings. Roughly a quarter of this area could provide herbs and vegetables with a place to thrive. The plants would then absorb some 28 million metric tons of 28 CO2 in Germany‘s cities each year. This is the equivalent of 80 percent of CO2emissions produced by industrial operations in Germany. “Our cooperation partner – BrightFarm, a US firm - has already completed several projects in New York. The company started out in 2005 with a small research institution on a raft before going on to build greenhouses atop a school for teaching purposes. This year, 1500 square meters‘ worth of roof space were developed in both the South Bronx and Brooklyn. Here in Germany, we are building an applications lab at the Fraunhofer-inHaus-Center in Duisburg. This is the Fraunhofer innovation workshop for intelligent room and building systems,“ certified geographer Simone Krause, Volkmar Keuter‘s colleague, points out.

The idea for urban agriculture is not new and is a hot topic of discussion at international level. Urban, vertical, sky or rooftop farming are the names by which the various approaches are known. Worldwide, futuristic, garden-bearing structures are the brainchildren of designers and architects in particular. Keuter and Krause, on the other hand, intend to make use of existing buildings. The researchers have their work cut out for them. “For instance, we have to set up logistics chains for regionally produced lettuce and herbs. Other questions include: Which products are best-suited? How widely accepted are nutrient solutions as an alternative to soil? We are relying on very high-quality vegetables, not on mass production,“ Simone Krause quickly adds. As of yet, there are only a handful of tomatoes growing on rooftops or in high-rises, but the idea is bearing fruit worldwide - after all, the freshness is hard to beat.

Volkmar Keuter | Fraunhofer Research News
Further information:
http://www.infarming.de

More articles from Agricultural and Forestry Science:

nachricht Filling intercropping info gap
16.11.2017 | American Society of Agronomy

nachricht Climate change, population growth may lead to open ocean aquaculture
05.10.2017 | Oregon State University

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

Im Focus: Wrinkles give heat a jolt in pillared graphene

Rice University researchers test 3-D carbon nanostructures' thermal transport abilities

Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

NASA detects solar flare pulses at Sun and Earth

17.11.2017 | Physics and Astronomy

NIST scientists discover how to switch liver cancer cell growth from 2-D to 3-D structures

17.11.2017 | Health and Medicine

The importance of biodiversity in forests could increase due to climate change

17.11.2017 | Studies and Analyses

VideoLinks
B2B-VideoLinks
More VideoLinks >>>