TREATMENT OF WASTEWATER WITH BIOREFRACTORY COMPOUNDS SUCH AS PULP MILL WASTEWATER

TREATMENT OF WASTEWATER WITH BIOREFRACTORY COMPOUNDS SUCH AS PULP MILL WASTEWATER

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 ultrafiltr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BAUMGARTEN, Sven, CANADA GARCIA, Pablo, DIPOFI, Moreno
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung: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.