TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred System: The control system further comprises at least a recovery of the enthalpy of steam and/or gas generated in reactor. The purge recovery system of the enthalpy of steam and/or gas generated in the reactor is a turbine. In addition, at least refrigeration vapor and/or gas generated in reactor. The cooling system is a capacitor. It further comprises condensate storage tank. The tank further comprises entry and, least condensate output and steam outlet and/or gas located plots in the top of the tank. The tank further comprises device selected from a pressure regulating valve, a pressure sensor, a temperature probe, a level probe, a deaerator, a vacuum breaker and a safety valve, as well as any combination of the above. The tube connector between the reactor and the reservoir (a) leads to the deposit below the surface of condensate. It further comprises a steam injection system. It further comprises at least an external steam generator. The external device is a steam generator boiler steam or compressor. It comprises, additionally, of the following equipment: (a) a pressurization equipment, (b) a vertical reactor investment flow, and (c) a cooling equipment. Preferred Method: Controlling temperature and pressure further comprises an additional step of pretreatment of biomass. The pretreatment stage comprises in turn, stage crushing and step of washing the biomass. The method comprises an additional step to recover part of the heat released cooling the mixture with charred biomass, at least, process water resulting from hydrothermal carbonization process preheating the aqueous mixture of biomass and catalyst fed to the system. Preferred Reactor: In the vertical reverse-flow reactor, the reactor further includes device selected from a group consisting of a safety valve, a pressure sensor, a temperature sensor, an air vent and gas and a vacuum breaker. The reactor includes turn on the side, entry for steam injection. EXAMPLE - No suitable example given.