An optical node is configured to enable time-division distribution of pump light for effectively utilizing pump power. The system may include a milk inlet system for pressurizing the milk, an air inlet system for pressurizing the air, a mixing area to mix the pressurized milk, the pressurized air, and the steam, and an expansion area to expand the mixture of the pressurized milk, the pressurized air, and the steam. the injection temperature, the outlet temperature and the bottomhole temperature is disclosed. The impeller is attached to an electric motor powered by batteries.