AEROBIC NITRIFYING AND DENITRIFYING METHOD

Japanese Patent JP3444560

B2

PURPOSE: To completely remove nitrogen from night soil as the contaminant source and other waste waters and to prevent the eutrophication of a city water source by treating sewage and/or sludge successively in the hydrogen fermentation stage, aerobic nitrifying and denitrifying stage and hydrogen- reduction stage.
CONSTITUTION: Sewage and/or sludge 1 are successively treated by aerobic nitrifying and denitrifying processes. In this case, hydrogen is formed by hydrogen producing bacteria in a hydrogen fermentation stage 2, and a reducing sulfide is formed by sulfate reducing bacteria. A fermentation-digested soln. 3 or the fermentation-digested soln. 3 into which a waste washing water 10 generated by washing 9 a gas 8 with water is introduced and contg. a reducing sulfide is completely nitrified under aerobic conditions by heterotrophic sulfur bacteria in the aerobic nitrifying and denitrifying stage 4, and the formed nitrate nitrogen is removed. A gas 11 after washing is introduced into a denitrified water 7 in a hydrogen-reduction stage 5 to completely denitrifying the nitrogen compds.

JP4835580	Treatment method of nitrogen-containing waste liquid
JP3183547	BIOLOGICAL OXIDATION REDUCTION REACTION APPARATUS AS WELL AS BIOFILTRATION METHOD AND WASHING METHOD USED IN THE REACTION APPARATUS
JP2003340488	IDENTIFICATION SYSTEM AND DENITRIFICATION METHOD

Yasunori Toya

JP25609894A

September 08, 2003

September 27, 1994

Click for automatic bibliography generation  

EBARA Research Institute, Ltd.
Ebara Corporation

C02F3/34; C02F11/02; (IPC1-7): C02F3/34; C02F11/02

JP5115897A
JP5115864A
JP5317881A
JP4169178A

Dai Matsuda

Previous Patent: MARKER BUOY DEVICE FOR SUBMERSIBLE BUOY

Next Patent: METHOD AND DEVICE FOR CHARACTER RECOGNITION