Here are some options
Chickens:
They are the easiest to farm in the city, anyone can do it. Chickens provide both meat and eggs and they eat kitchen scraps (this reduces waste) Their manure can be used to make a “tea” which is a good fertilizer (it can't be used 'raw' because it's too high in nitrogen.
There’s a great video on a chicken coop designed for use on patios and terraces, so you could even keep 2 or 3 chickens in a high-rise apartment
http://www.youtube.com/watch?v=RSbQF6AJLCo
also:
http://www.nytimes.com/2007/09/19/dining/19yard.html
This is an interesting article in the New York Times about people keeping chickens in the city. It talks about some of the problems (it’s illegal in some cities) and advantages, and mentions several websites for city-dwelling chicken owners, including The Chicken City (http://home.centurytel.net/thecitychicken/index.html) which is a great site for anyone who wants to raise chickens in the city; lots of information on breeds, coops, issues that may arise and how to solve them. Most of the information is for people who want to keep chickens in their backyard, focusing on chicken tractors (portable coops), but I also found the link to the above terrace coop on this site. Lots of great pictures
Manure digesters:
The manure undergoes an anaerobic digestion that produces methane and carbon dioxide which are then burned to make electricity. This produces heat. Any kind of manure (chicken, cattle etc.) can be used, and the manure can still be used as fertilizer after the digestion.Currently, they used only on large farms, but they could be adapted for residential use
| Roberts, Guy. "SMALL-SCALE MANURE DIGESTERS: POTENTIAL FOR ON-FARM HEAT AND ENERGY." http://www.uvm.edu/~cmorriso/AltEnergy/smallmanure.pdf (accessed Nov. 9, 2010). | |
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