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1. (WO2017037254) METHOD FOR TREATING INDUSTRIAL WASTEWATER CONTAINING ORGANIC COMPOUNDS

Pub. No.:    WO/2017/037254    International Application No.:    PCT/EP2016/070758
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Sep 03 01:59:59 CEST 2016
IPC: C02F 9/00
B01D 61/02
B01D 61/04
B01D 61/14
B01D 61/16
B01D 61/58
C02F 3/22
C02F 1/44
C02F 1/28
C02F 1/52
C02F 1/66
C02F 11/12
C02F 101/10
C02F 101/34
C02F 101/18
C02F 101/16
C02F 103/16
C02F 103/36
C02F 103/18
C02F 1/74
C02F 3/30
Applicants: THYSSENKRUPP INDUSTRIAL SOLUTIONS AG
thyssenkrupp AG
Inventors: THIELERT, Holger
STENZEL, Kerstin
Title: METHOD FOR TREATING INDUSTRIAL WASTEWATER CONTAINING ORGANIC COMPOUNDS
Abstract:
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.