Streamlining the approvals by having the City politicians back the concept might allow the whole cycle to happen in 5 years. I think there is a great deal of hype associated with composting and even the digestion processes that will produce gas. They do not reduce the volume of materials that much, and how much soil amendment material can we get rid of on farm land etc. But why would we continue to try to force the single family model on these areas. I would suggest that vitrifying the bottom ash from incinerators is a wasted effort, consuming large amounts of energy and providing little proven benefit to the environment.
Bottom ash resembles construction aggregate.
In most cases it is not used because there is a stigma attached to waste. As I note in the following material it is used in Europe. Fly ash is largely dust. It is the condensation product formed as the gases are cooled in the boiler to generate steam. The chief means of removing the dust from the gas stream is the fabric filter, simply a giant vacuum cleaner bag that allows gas to pass but retains the dust.