Title:
【発明の名称】原水からの窒素化合物の除去方法
Document Type and Number:
Japanese Patent JPH03504938
Kind Code:
A
Abstract:
PCT No. PCT/SE89/00305 Sec. 371 Date Nov. 5, 1990 Sec. 102(e) Date Nov. 5, 1990 PCT Filed May 31, 1989 PCT Pub. No. WO89/12029 PCT Pub. Date Dec. 14, 1989.Processes for the removal of nitrogen compounds from a supply of raw water are disclosed, including an initial denitrification step followed by aeration to release cell-bound nitrogen in the form of ammonium ions from the bacteria produced in the denitrification step without converting the ammonium ions into nitrate or nitrite ions, and precipitating the ammonium ions from the water to produce a substantially nitrogen free supply of water. The precipitation preferably includes treating the water with magnesium and phosphate ions to precipitate the ammonium ions in the form of struvite.
Inventors:
Hallberg, Rolf Oskar
Application Number:
JP50621789A
Publication Date:
October 31, 1991
Filing Date:
May 31, 1989
Export Citation:
Assignee:
Eco clear
International Classes:
C02F1/52; C02F1/58; C02F1/72; C02F3/28; C02F3/30; C02F3/34; C02F9/00; (IPC1-7): C02F1/58; C02F3/30; C02F3/34; C02F9/00
Domestic Patent References:
| JPS63158197A | 1988-07-01 | |||
| JPS5367675A | 1978-06-16 | |||
| JPS5966396A | 1984-04-14 |
Attorney, Agent or Firm:
Yumi Kaida (2 outside)
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