Sustainability · Mar 2026
記録
What 92% water recovery actually takes
A plain account of the reverse-osmosis plant behind the dye house, including what it cost.
True Origin mill · Kojima, Okayama
The plant
In 2011 the mill built a reverse-osmosis plant behind the dye house. Spent rinse water is screened, settled, filtered and pushed through membranes, then returned to the rope-dye range. Today it recovers 92% of process water.
A plain account of the reverse-osmosis plant behind the dye house, including what it cost.
What it cost
The plant cost roughly a year of the mill’s profit at the time, and membranes are replaced on a rolling schedule. Energy for the pumps is partly covered by rooftop solar, which now supplies 38% of mill demand.
What leaves
The remaining water is tested daily against the Okayama prefectural limit and runs well inside it. There has been no discharge of untreated dye liquor since 2016, and the yearly figures are available as a signed statement for your compliance file.
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Sampling
見本
Get the notes by post
Four times a year we send a printed sheet with a swatch stapled to it. Ask for it with your sample request.