Making of Largest Fish & Veggie Rooftop Farm


ECF has big plans for urban farming. And they plan to start at home, at the Malzfabrik, where their offices are based. The grand architecture of the rejuvenated industrial zone will now enter a new phase of evolution. A recently completed study indicates that the rooftop of the Malzfabrik can serve as the world’s largest rooftop aquaponic fish and vegetable farm. ECF plans a 7000 square meter (75,000 square feet) rooftop installation. In addition to being able to grow vegetables and fish, the dome can be equipped with PV panels and cooling turbines. The whole dome can be dismantled and packed inside the tank for easy shipping. Hopefully not only will such projects make food production more sustainable but also more local and seasonal. While the record setting Brooklyn rooftop farm is larger, it grows only vegetables.

 We have all heard of urban farms and rooftop gardens and even rooftop farms, but a rooftop fish farm might be a radical new concept. The prototype design is Globe/Hedron and it “is a bamboo  greenhouse designed to organically grow fish and vegetables on top of generic flat roofs.” The design is based on the aquaponic farming technique: The ammonia fish excrete fertilizes vegetables like tomatoes, salad leaves, and herbs in a greenhouse mounted on top of the tank! This system can produce 100 kilograms of fish and 400 kilograms of vegetables. This means that four families of four members each can be fed throughout the year. In the hot season, vegetables like cucumber, squash, tomatoes, eggplant, and melons can be grown. In the cold season, vegetables like Swiss chard, carrots, peas, broccoli, and cabbage can be grown.  All kinds of fish species can be grown like tilapia, salmon, and trout.

The structure is designed like a dome and the heavy fish tank rests on the frame of the greenhouse and its weight is redistributed to a larger surface areaIt is designed so that the water is pumped through a bio-filter from the fish tank to filter the nutrient rich feces, which is transformed into plant nutrients by bacteria. This water from the tank is pumped into the upper grow bed. Then, using gravity, the water trickles all the way down to the lower grow beds. The cleaned water is then pumped back into the tank. This ‘loop’ makes is easy for the system to run on minimal resources. The farm can be housed on roofs without any structural or building adaptation.  The structure itself is built with organically farmed bamboo, which makes it completely biodegradable and sustainable. This supports UrbanFarmers.

via TriplePundit