142 Mm3/day drinking water by RO plants based on 2019. So based on this report (https://www.netsolwater.com/how-much-electricity-is-consumed-by-ro-systems.php?blog=250), 3-10 kWh/m3 is the range of Reverse osmosis plants, so 420-1420 M Kwh/m3day.
Specific energy consumption (SEC) of seawater reverse osmosis (SWRO) process is about 2.5-4 kWh/m3, so total around the word based on report of 2019, 355-568 M Kwh/m3day
However, the technology is improving and we definitely have lower value nowadays, I think around 1.7-1.8 kWh/m3 (depending on the efficiency of the ERD and high-pressure pump)
In the link you shared, the report said "Reverse osmosis plants around the world consume more than 200 million kWh/day". so, can I convert this number to kWh/m3?
You should consider a range of values depending from size of the plant, salinity of raw seawater, and of course recovery ratio , use of brine rejects and finaly if you run the plant with energy from the grid or hybrid including renewable energy, solar mainly.
Current data are ranging from 2.7 to 10 kWh/m3 for the most efficient to the smallest ones not updated
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