Low-Temperature Thermal Desalination (LTTD) Technology for Island Freshwater Production

overview

The Low-Temperature Thermal Desalination (LTTD) technology uses natural ocean temperature gradients to evaporate warm surface seawater under low pressure and condense it using deep cold seawater, producing freshwater sustainably. Designed for islands with deep-sea access, LTTD is environmentally friendly, fully indigenous, and already deployed across multiple Lakshadweep Islands with proven long-term reliability.

Photo Gallery

8
TRL
8
Number of units currently deployed
30
No. of days or hours of training required

Key Features

High-capacity systems –1–1.5 lakh L/day with one year of O&M support.
Eco-friendly –Brine discharge <1% and no chemicals.
Indigenous –Robust, and suitable for island conditions, requiring 400 m depth within 1.5 km.