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Increased water recovery from organic laden process streams (olaps) byning NF with selected downstream processes and fouling prevention

Objective



The objective of this project is to demonstrate the feasibility of increased water recovery from organic-laden process streams by applying NF where it has previously been hard to use to concentrate the organic components in the process stream.

This will be done by addressing 3 issues that have been potential barriers to NF use:
1. NF membrane fouling by the process stream;
2. NF concentrate disposal;
3. Integration with other processes to allow NF permeate to be reused rather than discharged.

NF membrane fouling will be reduced by the following strategies:
1. Pre treatment with a novel compact softening process combining precipitation and filtration leading to adsorptive removal on a renewable adsorbent (the precipitate from the softening reaction) Two. Membrane surface modification involving in situ graft polymerisation of monomers on the membrane surface using redox initiators to generate radicals on the surface.

This method potentially allows in situ modification of commercial spiral wound elements. Three. Adaptation of commercial cross-rotational UF module to use NF membrane instead. The better mass transfer provided by this module has been demonstrated by several fold flux increase in past UF applications. Downstream processing will involve the following treatments: NF - concentrate - biodegradation or biotransformation in a membrane bioreactor. Ozonolysis may be coupled with the biodegradations to breakdown refractory materials. NF-permeate - ozonolysis, UV to further breakdown LMW organics that pass through the NF membrane, further treatment of salt mixtures if necessary. The combining of these processes will be mathematically modelled in order to identify regions for optimal operation with respect to operating costs. Initial technical feasibility will be demonstrated by running 2-4 on site demonstrations for 2-6 months treating slipstreams (up to 100 LPM) of the user partners. Operational goals are to demonstrate potential recovery of at least 90% of water volume in the slipstream and reduction of the volume of organic concentrate requiring disposal to less than half of what would be generated in conventional NF processes.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

BEN GURION UNIVERSITY OF THE NEGEV
Address
1,Hashalom Street 1
84105 Beer Sheva
Israel

Participants (7)

A H Marks and Company Ltd
United Kingdom
Address
Wyke Lane
BD12 9EJ Wyke - Bradford
DEAD SEA BROMINE GROUP LTD
Israel
Address
Kroitzer Street 12
84101 Beer Sheva
Dow Deutschland Inc.
Germany
Address

77834 Rheinmünster
FUMA-TECH GESELLSCHAFT FUER FUNKTIONELLE MEMBRANEN UND ANLAGENTECHNOLOGIE MBH
Germany
Address
Am Grubenstollen 11
1327 St Ingbert
LAPPEENRANTA UNIVERSITY OF TECHNOLOGY
Finland
Address
Skinnarilankatu 34
53851 Lappeenranta
UPM-Kymmene Corporation
Finland
Address

37601 Valkeakoski
University of Bath
United Kingdom
Address
Claverton Down
BA2 7AY Bath