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1. (WO2018046687) AQUEOUS EFFLUENT TREATMENT PROCESS

Pub. No.:    WO/2018/046687    International Application No.:    PCT/EP2017/072628
Publication Date: Fri Mar 16 00:59:59 CET 2018 International Filing Date: Sat Sep 09 01:59:59 CEST 2017
IPC: C02F 1/52
B01D 21/01
C02F 1/56
C02F 103/10
Applicants: S.P.C.M. SA
SNF (CHINA) FLOCCULANT CO., LTD.
Inventors: FAVERO, Cédrick
TIZZOTI, Morgan
Title: AQUEOUS EFFLUENT TREATMENT PROCESS
Abstract:
The invention relates to the treatment of mine tailings in the form of aqueous effluents comprising solid particles. The process of the invention makes it possible to separate all or part of the water from an aqueous effluent comprising solid particles. This process comprises (a) the addition to the effluent of at least one anionic modified natural polymer chosen from anionic guar gums and/or anionic starches, then (b) the addition of at least one cationic modified natural polymer chosen from cationic starches and/or cationic dextrans and/or cationic chitosans. The invention also relates to a composition comprising an aqueous effluent comprising solid particles treated by an anionic modified natural polymer and a cationic modified natural polymer. Preferably, it relates to a composition comprising an aqueous effluent comprising solid particles, at least one anionic modified natural polymer chosen from anionic guar gums and/or anionic starches, and at least one cationic modified natural polymer chosen from cationic starches and/or cationic dextrans and/or cationic chitosans.