| 摘要 |
The invention relates to a method for treating industrial wastewater containing organic compounds. The industrial wastewater undergoes a biological purification process (4, 8) in which impurities contained in the industrial wastewater are decomposed using bacteria, and subsequently sludge is separated from the wastewater which has been at least partly biologically purified using at least one membrane separation system (6, 10, 12, 15). According to the invention, permeate drawn from the membrane separation system (6, 10, 12, 15) is not discharged as purified water and dispensed in liquid form into the environment but rather supplied for utilization, whereby a wastewater-free process is carried out. The permeate drawn from the membrane separation system (6, 10, 12, 15) is at least partly supplied to a metal production and/or metal machining process and used for cooling slag. At least one part of the residual material contained in the permeate remains on the slag after the cooling process. |
