image from http://solanacompost.wordpress.com/2008/11/06/master-composters-at-deer-park-monastery/
This may be a solution for a campus, a co-housing community, a business cooperative, or a small town. When you look at the cost of transporting wet waste to a centralized facility, the Earth Tub could pay for itself in no time.
It is a bit of work to maintain (more than the City Hall system) but can handle a whole lot of waste material and stay relatively worry free. Trouble is, just like a tumbler, what do you do when the unit is full? Their web site says it is continuous up to 20kg of food waste per day.
If you know anyone who has one, please let me know and I will try to arrange a tour.
details at http://www.compostingtechnology.com/invesselsystems/earthtub/
watch the video at http://www.youtube.com/watch?v=WtdKT26x7Uk (interesting part starts at 4 min 20 sec)