Fukuoka's desalination plant treats about 16400 m^3 of water per day. Assuming 3kWh per m^3 of water, this works out to a time-averaged power consuption of ~2000kW.
The osmotic power plant generates about 100kW, so it's about 5% of the total desalination energy requirement.
The osmotic power plant generates about 100kW, so it's about 5% of the total desalination energy requirement.