Ultra low pressure reverse osmosis membrane performance for … · 2020. 5. 26. · Part of: LANXESS Performance Chemicals Segment Customers: > 1,500 Market position: One of the top

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

J. Ogier, Madrid, 19-20 November 20192


Introduction


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


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


Context


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


▪ 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


Test setup


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


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/


Experimental Results


▪ 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


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


High level of nitrate rejectionExperimental results


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


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


Ammonium rejectionExperimental results


High level of micro-pollutant rejection

High micro-pollutant rejection

▪ Impact of water matrix

▪ Impact of membrane fouling

▪ Impact of molecule configurations


▪ 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.


Conclusion & Outlook


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.

The manner in which you use and the purpose to which you put and utilize our products, technical assistance and information (whether verbal, written or by way ofproduction evaluations), including any suggested formulations and recommendations are beyond our control. Therefore, it is imperative that you test our products,technical assistance and information to determine to your own satisfaction whether they are suitable for your intended uses and applications. This application-specificanalysis must at least include testing to determine suitability from a technical as well as health, safety, and environmental standpoint. Such testing has not necessarilybeen done by us. Unless we otherwise agree in writing, all products are sold strictly pursuant to the terms of our standard conditions of sale. All information andtechnical assistance is given without warranty or guarantee and is subject to change without notice. It is expressly understood and agreed that you assume and herebyexpressly release us from all liability, in tort, contract or otherwise, incurred in connection with the use of our products, technical assistance, and information.

Any statement or recommendation not contained herein is unauthorized and shall not bind us. Nothing herein shall be construed as a recommendation to use anyproduct in conflict with patents covering any material or its use. No license is implied or in fact granted under the claims of any patent.

Safe harbor statement


Thank you for your attention !



Documents

Ultra low pressure reverse osmosis membrane performance for … · 2020. 5. 26. · Part of: LANXESS Performance Chemicals Segment Customers: > 1,500 Market position: One of the top