I too live in an urban environment. I would love to build a gasifier for extra security. I also have questions about the possibility of combining a biochar retort with other elements to capture and use the gasses that are released from the charcoal production. Is this possible? What are the safety concerns we urbanites would be facing in building a gasifier and living in such close quarters? Thanks so much!!
I am not sure what you are totally wanting but you could easily make a small gasifier to do all you cooking and to warm up plenty of hot water. I sat for a couple of days watching youtubes on this subject while sick. Some are incredibly easy to make out of a couple of cans and get much more advanced when adding in water heating. I made a small one and used if for a week while camping and only had to burn some twigs and pinecones. HTH.
In an urban environment you don't have alot of space for a 500 lb. gas producer unless you are at a community waste facility. If you where a contractor building houses you have wood waste and you are allowed to be messy and make noise. That would be the sweet spot.
Like Kim is saying, for cooking and power outage purposes you can make little woodgas camp stoves that will take up the space of a coffee can. That is your best best.
Learn how to make free motor fuel at home using wood. It's called wood gasification. It's a 100+ year old technology that powered 1 million vehicles during WWII. Learn more at http://woodgasifierplans.com
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