Employing the concepts of environmentally friendly utilization and recycling, Yuen Foong Yu's Cheng Kung plant had by the second half of last year manufactured one ton of paper with only 20 tons of waste water (though the production process still required 300 tons of water). They thus saved a great deal in water costs and in waste water treatment fees (which are NT $ 4-5 per ton).
在這種循環利用及回收的理念下，永豐餘成功廠已在去年下半年做到一噸紙平均只排放廿噸廢水（雖然整個製程實際仍要用到三百噸的水），水費和廢水處理費（一噸約四∼五元）因此節省不少。