Two problems that I thinks we cannot control: 1. The odor produced when all the organic is composting (many people will not like it), especially if we planned to bound the composting site in urban areas for any convenience reason. 2. Cannot filter what people will throw in the composting site (all we want is organic matters)
There already a method called "Waste Sorting" on public trash can, maybe if to provide more of this can we can start to get the the organic waste resources from there, then we can transport only the organic waste to registered farmers area to be composed. (so collecting in urban area, composing in another area).