Garbage burning rampant in Noida
You are correct that there are technologies for this, but it will cost. I am assuming we are talking about household garbage. If it is, the best idea is prevention of generating it. and make it less voluminous. I am assuming the garbage is mostly packaging material. Secondly, there can be a private-public partnership to build infrastructure for processing. It can be collected and processed. It is important that we create awareness among people to be responsible.
A caution: There was an electric generating station built near where I live. The fuel for it was entirely garbage. It was in existence for three or four decades. It was, however, plagued by unfavorable environmental impact, and became cost-prohibitive. Finally, it had to be shutdown. more