| abstract |
1297316 Treating waste water PROCTER & GAMBLE CO 25 Sept 1970 [29 Sept 1969] 45842/70 Heading C1C [Also in Divisions C3 and C6] Soil &c. present in water is subjected to enzymatic attack by passing the water over a composition which comprises an alkaline protease enzyme derived from Bacillus subtilis bonded through the linkage to a water-insoluble polymethacryloyl chloride resin matrix. Water treated in this way may, be effluent from a washing appliance, the treated water possibly being recycled to the appliance. |