The article presents oxygen gasification installation for waste biomass in the waste-to-fuel technology, in which the final product is liquid methanol (being the reference case). The balance of the system includes the energy consumption of the Air Separation Unit. The installation of oxygen gasification of waste biomass has two potential locations to use the waste heat of the generated syngas. The first such location is in front of the SHIFT reactor and the second is in front of the membrane. A comparison of the use of an expander, Stirling engines and ORC modules to power the electrolytic hydrogen generation installation was proposed. The produced hydrogen is an additional substrate for the methanol reactor, which will consequently increase the methanol yield from the entire installation and reduce the specific CO2 emissions. Oxygen from the electrolysis process can be used in the gasifier, which will reduce the energy consumption of the Air Separation Unit, and thus increase the efficiency of the entire gasification system.