Wastewater purification system comprises biological purification stage, where part of the wastewater is conducted into a purification stage with wet oxidation after biological purification stage and is guided back again to the wastewater

摘要

The wastewater purification system comprises a biological purification stage (5), where a part of the wastewater (1) is conducted into a purification stage with wet oxidation after the biological purification stage and is guided back again to the wastewater in an upstream section of the wastewater purification system after the wet oxidation. The biological purification stage is aerobically carried out and works after the activated sludge process. The biological purification stage has an activated sludge tank (2a) and a subsequent settling tank (2b). The wastewater purification system comprises a biological purification stage (5), where a part of the wastewater (1) is conducted into a purification stage with wet oxidation after the biological purification stage and is guided back again to the wastewater in an upstream section of the wastewater purification system after the wet oxidation. The biological purification stage is aerobically carried out and works after the activated sludge process. The biological purification stage has an activated sludge tank (2a) and a subsequent settling tank (2b), where the part of the wastewater conducted by the wet oxidation-purification stage is partially guided into the activated sludge tank or is guided back from the activated sludge tank to the wastewater. The wet oxidation-purification stage is electrochemically carried out in an UV-supporting manner. The biological purification stage is the last biological purification stage of the wastewater purification system, and follows a further biological purification stage, which is aerobically formed and is formed as bio-filter. The biomass accruing during bio-filter is partially guided back into the biological purification stage aerobically arranged before the wet oxidation-purification stage. A decay accelerating factor-purification stage (4) is arranged between the biological purification stage and the wet oxidation-purification stage. The wastewater originates from a machine for producing and/or finishing a paper-, cardboard or other fibrous material web.