Method for treating waste water

摘要

PCT No. PCT/JP87/00080 Sec. 371 Date Oct. 6, 1987 Sec. 102(e) Date Oct. 6, 1987 PCT Filed Feb. 9, 1987 PCT Pub. No. WO87/04695 PCT Pub. Date Aug. 13, 1987.A method of treating raw water containing phosphorous and nitrogen compounds and organic matter in which the raw water is passed through an aerobic zone containing a porous material. Anaerobic treatment is carried out in the presence of a hydrogen donor. The porous material is tobermorite and/or xonotlite with a porosity of 50% to 90% and is produced by foaming and hardening a silica-based material, a lime-based material and water, and subjecting the porous material to hydrothermal synthesis. The order of the aerobic and anaerobic treatments may be varied.