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1. WO2020068989 - CERIUM-LANTHANUM TREATMENT METHOD FOR REDUCTION OF CONTAMINANTS IN WASTEWATER MEMBRANE BIOREACTORS

Publication Number WO/2020/068989
Publication Date 02.04.2020
International Application No. PCT/US2019/052968
International Filing Date 25.09.2019
IPC
C02F 3/12 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
3Biological treatment of water, waste water, or sewage
02Aerobic processes
12Activated sludge processes
C02F 1/52 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
52by flocculation or precipitation of suspended impurities
B01D 61/16 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
61Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
14Ultrafiltration; Microfiltration
16Feed pretreatment
B01D 61/22 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
61Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
14Ultrafiltration; Microfiltration
22Controlling or regulating
B01D 65/08 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
65Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
08Prevention of membrane fouling or of concentration polarisation
C02F 101/10 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
101Nature of the contaminant
10Inorganic compounds
CPC
B01D 2311/04
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2311Details relating to membrane separation process operations and control
04Specific process operations in the feed stream; Feed pretreatment
B01D 2311/12
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2311Details relating to membrane separation process operations and control
12Addition of chemical agents
B01D 2311/246
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2311Details relating to membrane separation process operations and control
24Quality control
246Concentration control
B01D 2311/2642
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2311Details relating to membrane separation process operations and control
26Further operations combined with membrane separation precesses
2642Aggregation, sedimentation, flocculation, precipitation or coagulation
B01D 2311/2688
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2311Details relating to membrane separation process operations and control
26Further operations combined with membrane separation precesses
2688Biological processes
B01D 2315/06
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2315Details relating to the membrane module operation
06Submerged-type; Immersion type
Applicants
  • NEO CHEMICAL & OXIDES, LLC [US]/[US]
Inventors
  • CORNISH, Pamela, Leigh
  • HANELINE, Mason, Reames
Agents
  • HAYWORTH, Melissa, M.
  • LEWIS, George, C.
Priority Data
16/581,56124.09.2019US
62/736,12225.09.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CERIUM-LANTHANUM TREATMENT METHOD FOR REDUCTION OF CONTAMINANTS IN WASTEWATER MEMBRANE BIOREACTORS
(FR) PROCÉDÉ DE TRAITEMENT DE CÉRIUM-LANTHANE POUR LA RÉDUCTION DE CONTAMINANTS DANS DES BIORÉACTEURS À MEMBRANE POUR EAUX USÉES
Abstract
(EN)
Disclosed are methods of treating wastewater using a membrane bioreactor and achieving a target phosphorus concentration for the membrane permeate stream. These methods include the steps of dosing a wastewater stream with a rare earth clarifying agent and passing the dosed wastewater stream through the membrane to obtain a membrane permeate stream with a permeate concentration that is less than the phosphorus concentration of the influent stream. This permeate concentration also can be equal to or less than a target phosphorus concentration. In the methods as disclosed herein, the rare earth clarifying agent can be chloride salts of one or more rare earth elements and in certain embodiments, the rare earth clarifying agent can be LaC13 and LaC13.
(FR)
L'invention concerne des procédés de traitement des eaux usées à l'aide d'un bioréacteur à membrane et l'obtention d'une concentration cible en phosphore pour le flux de perméat de la membrane. Ces procédés comprennent les étapes consistant à doser un flux d'eaux usées avec un agent de clarification de terres rares et à faire passer le flux d'eaux usées dosé à travers la membrane pour obtenir un flux de perméat de membrane ayant une concentration de perméat inférieure à la concentration en phosphore du flux entrant. Cette concentration de perméat peut également être égale ou inférieure à une concentration cible en phosphore. Selon les procédés de l'invention, l'agent de clarification de terres rares peut être un sel de chlorure d'un ou plusieurs éléments de terres rares, et dans certains modes de réalisation, l'agent de clarification des terres rares peut être LaC13 et LaC13.
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