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1. (WO2018001743) METHOD FOR OPERATING A MEMBRANE BIOREACTOR OF A WATER TREATMENT SYSTEM AND CORRESPONDING MEMBRANE BIOREACTOR AND WATER TREATMENT SYSTEM

Pub. No.:    WO/2018/001743    International Application No.:    PCT/EP2017/064605
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Thu Jun 15 01:59:59 CEST 2017
IPC: C02F 3/12
C02F 1/44
Applicants: UNIVERSITAT DE GIRONA
FUNDACIÓ INSTITUT CATALÀ DE RECERCA DE L'AIGUA (ICRA)
Inventors: BLANDIN, Gaetan
RODRÍGUEZ-RODA LAYRET, Ignasi
COMAS I MATAS, Joaquim
Title: METHOD FOR OPERATING A MEMBRANE BIOREACTOR OF A WATER TREATMENT SYSTEM AND CORRESPONDING MEMBRANE BIOREACTOR AND WATER TREATMENT SYSTEM
Abstract:
Method for operating a membrane bioreactor of a water treatment system for water production and corresponding bioreactor and water treatment system. The MBR comprises a mixed liquor basin (2) and a membrane stack (4) with a plurality of UF or MF membrane modules (6) operable to produce a non-potable water stream. Depending on the incoming wastewater and the water production needs the method comprises a replacing step in which at least one UF or MF membrane module (6) is replaced by at least one corresponding semipermeable membrane module (8) in the same membrane stack (4). With the semipermeable membrane module (8) a forward osmosis step is carried out circulating a draw solution having a higher osmotic pressure than the osmotic pressure of said mixed liquor such as to produce a diluted draw solution stream downstream of said membrane stack (4).