Alaqua Inc is the rising film evaporators supplier that is also known as the LTV or Long Tube Vertical Evaporators which is the combination of rising and falling film evaporators. They operate on the “thermo-siphon” principle where a very high ratio of evaporation is necessary to feed and the bundle of tubes that can be divided or separated into two parts where the first one to operate is a rising film and the second part operates as a falling-film. The rising film evaporators can be used for the concentration of sugarcane syrups, nitrates, black liquor in paper plants, and electrolytic tinning liquors.