Provided is a waste-to-energy conversion apparatus. The waste-to-energy conversion apparatus comprises a primary combustion chamber capable of holding a load of waste, and the primary combustion chamber further comprises a heat source to heat the waste and generate a synthetic gas stream, grates, within the primary chamber, capable of supporting the load of waste during heating, a mixing chamber wherein the synthetic gas is mixed with additional combustion gas, a multi-chambered secondary combustion chamber for combusting the mixture of synthetic gas and additional combustion gas, and an energy extraction system for extracting the heat energy generated by the combustion of the mixture of synthetic gas and additional combustion gas.