公开(公告)号：US20210253463A1

公开(公告)日：2021-08-19

申请号：US17251085

申请日：2019-06-27

Applicant: BL TECHNOLOGIES, INC.

Inventor： Sven BAUMGARTEN ,  Moreno DIPOFI ,  Pablo CANADA GARCIA

IPC: C02F9/00 ,  C02F1/44 ,  C02F3/12 ,  B01D69/02 ,  B01D69/12 ,  B01D61/18

Abstract: In a system and process described herein, wastewater such as pulp mill wastewater is treated with a membrane bioreactor (MBR) or another biological process coupled with tertiary filtration. An intermediate filtrate such as permeate from the membrane bioreactor is then treated with a tight ultrafiltration membrane optionally having a molecular weight cut-off of 500-4,500 Da on polyethylene glycol. Optionally, concentrate from the ultrafiltration membrane is sent to a black liquor evaporator of the pulp mill.