Toyobo Co., Ltd. is supplying the hollow fiber type reverse
osmosis membrane modules to the seawater desalination plant
of the Fukuoka District Waterworks Agency which formally began
operating in June 2005.
The daily production capacity of 50,000 m3/day for the Fukuoka
seawater desalination plant. boasts the largest scale in Japan
, and the operating recovery of 60% for the RO process is one
of the highest levels of efficiency in the world. An ultra-filtration
membrane system was adopted for the pretreatment step, and
the newest reverse osmosis seawater desalination process system
was selected based on a partial, two - pass design including
a low-pressure reverse osmosis process. This advanced system
design allows for adjustment to seasonal seawater changes,
meeting production quantity and quality requirements, and minimizes
overall operating costs.