Energy-efficient biomimetic membranes for blue energy harvesting

EcoBLUE

This project aims to produce affordable and clean energy using the pressure retarded osmosis (PRO) process, also known as blue energy. PRO generates energy from the salinity gradient between two water sources using a semipermeable membrane. The project proposes a new biologically-inspired membrane called 'MangBrine,' derived from mangrove roots, for PRO to produce blue energy (EcoBLUE).

Funders

SEM image of synthesized composite membrane

Project information

Project duration

-

Funded by

Research Council of Finland - Academy Project

Funding amount

857 231 EUR

Project coordinator

University of Oulu

Contact information

Project leader

Other persons

Project description

The term "blue energy" is also synonym to salinity gradient power, which is a form of renewable energy that generates energy from the salinity gradient between two water sources. One of the most common sources of blue energy is in the coastal areas where freshwater and seawater co-exists. In this process, a semipermeable membrane is used to separate concentrated saline (sea) water and diluted freshwater. Water diffuses from the feed solution to the draw solution containing pressurized saline water. The mixing of both solutions results in blue energy generation, which can be expressed by Gibbs energy of mixing. Ideally, membranes with perfect hydrodynamics provide water passage and fully retain all other solutes or ions. This research aims to contribute to clean and cost-effective blue energy generation, aligning with Goal 7 of the sustainable development goals.