1. A mixture of air (18) and water vapour (19) may be used as gasifying gas.

2. Laboratory apparatus, in particular laboratory cabinets and laboratory chests, power supply units, vacuum chambers, test cabinets, gasifying cabinets, culturing cabinets and chests, solvent recovery units, the latter mainly consisting of refrigerated vessels, absorption apparatus, heating devices, and/or cooling traps

3. This only entails small temperature and pressure losses with respect to the residual quenching water leaving, and only a small additional amount of energy has to be expended to overcome the remaining pressure difference to bring the filtrate that is to be returned back to the gasifying pressure.