| 摘要 |
A method for wastewater treatment, in a continuous flow system, and a plant for wastewater treatment, to achieve high level reduction of biogenic nitrate compounds are provided. Subjecting a mixture of active sludge and wastewater to vacuum degassing on the mixture that has been subject to earlier nitrification, but not introduced in a recirculation-return connection, and constituting the outflow from a nitrification volume, before degassing, is subject to additional denitrification. The mixture of active sludge and wastewater, due to the additional denitrification step, may be free of carbon carried along with wastewater. An external source of readily available carbon is introduced, and further deepened nitrates removal is performed. After wastewater is degassed, treatment continues within a gaseous nitrogen undersaturated aqueous zone of a secondary sedimentation tank. |
