ultra low pressure reverse osmosis membrane performance for … · 2020. 5. 26. · part of:...
TRANSCRIPT
Ultra low pressure reverse osmosis membrane performance for water decontamination
Jaume Alemany Rosaleny
Agenda
1. Introduction
2. Context
3. Test setup
4. Experimental results
5. Conclusion and outlook
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Introduction
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LANXESS – A globally operating specialty chemicals company
▪ Spin-off from Bayer in 2004
▪ Specialty chemicals portfolio:
chemical intermediates, specialty chemicals and plastics
Specialty
chemicals
company
Global
success
story
Strategy of
profitability
and resilience
▪ 60 sites worldwide
▪ Approximately 15,400 employees in 33 countries
▪ Global sales of EUR 7,2 billion in 2018
▪ Strengthening of leading position in medium-sized markets
▪ Consolidation in Europe, expansion in USA and Asia
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Liquid Purification Technologies – a leading global solution
supplier for liquid treatment
▪ Part of: LANXESS Performance Chemicals Segment
▪ Customers: > 1,500
▪ Market position: One of the top ion exchange resin (IX) manufacturer
Strong commitment to new reverse osmosis (RO) business
▪ Ion exchange resins, iron oxide adsorbers & functional polymers
▪ Reverse osmosis membrane elements
▪ Leading design software for IX and RO equipment dimensioningProducts &
Brands
Applications
Facts
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Context
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Chemical pollution of waterThreat to the environment and human health
Contamination sources
▪ Waste water treatment plant
▪ Water runoff
▪ Industrial discharge
▪ Agricultural area runoff
Points of concerns
▪ Global contamination
▪ Chemical contamination
▪ Efficiency of treatment plants
▪ Regulation
▪ Public pressure
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▪ Nitrate
▪ Ammonium
▪ Micro-pollutants:
− Benzotriazole
− Diclofenac
− Glyphosate
− Carbamazepine
− Ibuprofen
− Etc.
Rejection investigation at lab and large scale
Test of ultra low pressure reverse osmosis membrane
Laboratory scale test
Pilot test unit
Lewabrane® ULP reverse
osmosis membrane
Compounds of interest
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Test setup
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Laboratory scale setup for rejection evaluation
Nitrate and ammonium rejection
▪ 8 inch element Lewabrane® B400 ULP ASD
▪ Feed pressure : 7.6 bar
▪ Recovery : 15%
▪ Feed pH : 3 to 11
▪ Feed temperature : 10°C to 40°C
▪ Feed composition :− 500mg/L NaCl, 200mg/L NO3
-, 35mg/L NH4+
▪ Design of Experiment and surface response
methodology
Micro-pollutants rejection
▪ Coupon of Lewabrane® ULP membrane
▪ Feed pressure : 7.6 bar
▪ Feed composition :
− 500mg/L NaCl, 5µg/L of each micro-pollutants
▪ Feed temperature : 25°C
▪ Feed pH : 7
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Onsite pilot testReal operating conditions
Basis
▪ Exploration of waste water reuse
opportunities
▪ Funded by the German Federal Ministry of
Education and Research
▪ Nordenham, Germany
▪ 4 inch Lewabrane® B085 ULP 4040
▪ Conductivity : 1000-3500 µS/cm
▪ Recovery : 75%
WWTP
coagulation
Ultra filtration Reverse
osmosis
▪ Long-term tests
▪ Stability of the RO-process in operation
▪ Rejections of conductivity (<28µS/cm) and
micro-pollutants evaluation
Objectives Pilot test setup
https://water-multi-reuse.org/en/
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Experimental Results
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▪ Fit quadratic model
▪ Wide range of application covered
▪ Rejection higher than 95% for pH range 6 – 8
▪ Significant influence of pH on rejection
High level of nitrate rejectionExperimental results
Contour plot for nitrate rejection, lab experimentLab experiment
Nitrate rejectionNitrate rejection
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Contour plot for nitrate rejection, lab experiment
▪ Fit quadratic model
▪ Wide range of application covered
▪ Rejection higher than 95% for pH range 6 – 8
▪ Significant influence of pH on rejection
Nitrate rejectionNitrate rejection
Lab experiment
Pilot unit result
▪ Nitrate rejection 97.2%
▪ pH 6.7
▪ Temperature : 13.5°C
Good match
https://water-multi-reuse.org/en/
High level of nitrate rejectionExperimental results
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Fitted curve for ammonium rejection, lab experiment
Ammonium rejection, strong impact of pHExperimental results
Lab experiment
Ammonium rejection
▪ No quadratic model → fitted curve
▪ Wide range of pH covered
▪ Only pH influenced the rejection
▪ Rejection above 96% for pH from 5.5 to 7.2
Ammonium rejection
▪ Ammonia/ammonium pKa : 9.25
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Fitted curve for ammonium rejection, lab experimentLab experiment
Ammonium rejection
▪ No quadratic model → fitted curve
▪ Wide range of pH covered
▪ Only pH influenced the rejection
▪ Rejection above 96% for pH from 5.5 to 7.2
Ammonium rejection
Pilot unit result
▪ Ammonium rejection 96.5%
▪ pH 6.7
▪ Temperature : 13.5°C
Good match
https://water-multi-reuse.org/en/
Ammonium rejectionExperimental results
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High level of micro-pollutant rejection
High micro-pollutant rejection
▪ Impact of water matrix
▪ Impact of membrane fouling
▪ Impact of molecule configurations
https://water-multi-reuse.org/en/
▪ High level of rejection
▪ Comparable order of magnitude
between lab and onsite results
▪ High efficiency in comparison to other
techniques like oxidation or activated
carbon.
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Conclusion & Outlook
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Conclusion & Outlook
▪ Lewabrane® ULP-membranes suitable for water decontamination due to
▪ High rejection of nitrate
▪ High rejection of ammonium
▪ High rejection of studied micro pollutants
▪ Laboratory results confirmed by onsite test results
▪ Comparison of removal efficiency to other technologies such as activated carbon
▪ Investigation of fouling impact on rejection
Health and Safety Information: Appropriate literature has been assembled which provides information concerning the health and safety precautions that must beobserved when handling the LANXESS products mentioned in this publication. For materials mentioned which are not LANXESS products, appropriate industrial hygieneand other safety precautions recommended by their manufacturers should be followed. Before working with any of these products, you must read and become familiarwith the available information on their hazards, proper use and handling. This cannot be overemphasized. Information is available in several forms, e.g., material safetydata sheets, product information and product labels. Consult your LANXESS representative in Germany or contact the Regulatory Affairs and Product Safety Departmentof LANXESS Deutschland GmbH or - for business in the USA - the LANXESS Corporation Product Safety and Regulatory Affairs Department in Pittsburgh, PA, USA.
Regulatory Compliance Information: Some of the end uses of the products described in this publication must comply with applicable regulations, such as the FDA, BfR,NSF, USDA, and CPSC. If you have any questions on the regulatory status of these products, contact – for business in the USA- , the LANXESS Corporation RegulatoryAffairs and Product Safety Department in Pittsburgh, PA, USA or for business outside US the Regulatory Affairs and Product Safety Department of LANXESS DeutschlandGmbH in Germany.
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Safe harbor statement
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Thank you for your attention !
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