Post on 21-Feb-2023
Nanomaterials for Industrial Wastewater
Materials Moving Molecules 14 March 2018 – Slide 1© 2018 Dais Analytic Corporation. All rights reserved. www.daisanalytic.com
Dais: An Overview
Aqualyte™: The Foundation of Dais
NanoClear™: The Future of Clean Water
Nanomaterials for Industrial Wastewater
Materials Moving Molecules © 2018 Dais Analytic Corporation. All rights reserved. www.daisanalytic.com 14 March 2018 – Slide 2
Dais AnalyticExperienced nanotechnology innovation company
A world leader in nanotechnology polymer materials Invented/commercialized a disruptive family of nanomaterials (Aqualyte™)
Headquarters outside of Tampa, Florida, USA
22 patents issued or pending
History of Dais Incorporated in 1999, 16 employees
Developed Aqualyte as a PEM fuel cell membrane
Commercialized ConsERV energy recovery ventilator for HVAC in 2004
Added NanoClear product line in 2017
Our business model Entrepreneurial, product-based outlook
Focus on membrane and value-added components featuring the membrane
License and supply to partners who engineer and sell complete systems
Tampa, FL
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Incorporation ConsERV commercialization NanoClear development begins NanoClear commercializationNanoClear product development and testing
Innovative nanotechnology materials and processes addressing global needs in energy and water.
The unique, proven features of the Aqualyte™ family of
nanomaterials allow Dais to offer disruptive, first-in-a-generation
technology that keeps our air cleaner, conserves our energy, and
provides incredibly clean water. The employees of Dais believe
that as our company profits, so too should our planet and our
people.
Da
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Nanomaterials for Industrial Wastewater
Materials Moving Molecules © 2018 Dais Analytic Corporation. All rights reserved. www.daisanalytic.com 14 March 2018 – Slide 3
Patented polymer with carefully tailored properties
Dense, nonporous material Blocks passage of most gases and volatile compounds
Highly selective Strongly favors water molecules while rejecting most
contaminants
High flux Transfer water molecules readily via pervaporation
Fully commercialized Proven durability over 15 years
Modified block copolymer self-organizes Polar functional groups make polymer partially hydrophilic
“Like” blocks solidify beside each other
Nanoscale structure results (see TEM image)
5 – 20 nm wide region
Membrane cross-section (TEM)
Dark areas in image are solid regions of hydrophilic polymer
Conceptual image of a hydrated Aqualyte membrane (drawing is not to scale)
Hydrophobic region
Hydrophobic region
Hydrophobic region
Hydrophilic region
Hydrophilic regionPolymer swells with water molecules
Hydrophobic regions provide structure
Hydrophilic region
Hydrophilic region
Hydrophobic region
Provides a “superhighway” for water molecules to permeate through the polymer at high speed.
NanoClear™ OverviewFouling-resistant treatment of concentrated water
Nanomaterials for Industrial Wastewater
Materials Moving Molecules © 2018 Dais Analytic Corporation. All rights reserved. www.daisanalytic.com 14 March 2018 – Slide 4
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Selective membrane Strong rejection of ions & nonpolar molecules
TDS to 250,000 mg/L
COD to 50,000 mg/L
pH 2 - 11
Product water < 10 mg/L TDS; independent of wastewater input
Capture 60 – 99% of wastewater
Varying transmission of polar molecules
Size, volatility are also parameters
Pervaporation membrane distillation Water molecules permeate and evaporate
Vapor is condensed to product water
Membrane flux ≥ microporous materials
Vapor pressure difference drives transfer between surfaces
Thermal ProcessingFundamentally different from most membranes
Low pressure evaporation Driven by thermal gradient
Energy requirement is independent of TDS
Approximately 2350 kJ per kg evaporated
External heat maintains gradient Evaporative cooling reduces wastewater temperature
Circulation flow >> product flow
High volume, low pressure flow
Batch or continuous
Today’s membrane evaporator is part of a larger product line Maximizes driving force for recovery from high concentration water
Multiple effect evaporators (2H 2018 release) re-use external heat
Membrane-enhanced MVR will operate without external heat
Nanomaterials for Industrial Wastewater
Materials Moving Molecules © 2018 Dais Analytic Corporation. All rights reserved. www.daisanalytic.com 14 March 2018 – Slide 5
Concentrate
Heat Source
Membrane Evaporator
Warm Wastewater
Circulation Flow
Heated Wastewater
Makeup Water
Vacuum Pump
Condenser
Produced Water
Cooling Loop
Heat Sink
Water Vapor
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Nanomaterials for Industrial Wastewater
Materials Moving Molecules © 2018 Dais Analytic Corporation. All rights reserved. www.daisanalytic.com 14 March 2018 – Slide 6
Specializing in Harsh EnvironmentsSurface structure & chemistry reduce fouling, product excels with high TDS water
No pores
Strongly hydrophilic materials create an exclusion zone (see images ) Hydrogen bonding organizes “sheath” of water molecules that help keep material from fouling
Foulants that make it to the surface find little purchase and are easily swept away in cross-flow
Biofouling resistant Smooth surface, acidic environment
Little pretreatment required Remove suspended solids > 20 μm
Minimal maintenance
Image from Zheng, Jian-ming and Gerald Pollack. "Long-range forces extending from polymer-gel surfaces." Physical Review E (2003): 0314081-0314088
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Bacteria
Polymer Cross Section
5 - 20 nm domains
500 nm
How Small is a Nanometer?
Nanomaterials for Industrial Wastewater
Materials Moving Molecules © 2018 Dais Analytic Corporation. All rights reserved. www.daisanalytic.com 14 March 2018 – Slide 7
Fundamentally DifferentLow-pressure thermal process doesn’t act like pressure-based filtration
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NanoClear Reverse Osmosis (RO)
Technology SummaryHot wastewater passes over membrane;
water vapor transferred via vapor pressure differential
Water forced through membrane by overcoming osmotic pressure
Operational Pressures < 35 kPa 1000 – 7000 kPa
Membrane Fouling Little or no fouling Susceptible
Wastewater Treatment Little or no pretreatment Pre- and post-treatment required
High Saline Content25% salinity with no membrane damage or
energy increaseDifficult to exceed 6 – 8% salinity because
of increase in energy usage
Recovery 60 – 99% 20 – 70%
Product Water Quality (TDS) 0 – 5 ppm 100 – 400 ppm
Nanomaterials for Industrial Wastewater
Materials Moving Molecules © 2018 Dais Analytic Corporation. All rights reserved. www.daisanalytic.com 14 March 2018 – Slide 8
Market PositionNanoClear benefits vs. conventional technology
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PrefiltrationUF 1 and UF 2
$0.23/m3 OPEX RO 1 and RO 2
$0.50 - $1.50/m3 OPEX
PrefiltrationNanoClear
$0.30 - $0.40/m3Sand / ClayUndissolved Organics SolidsSuspended SolidsColloidal SolutionsOil EmulsionsMacromoleculesBacterial / CellsVirusesProteinsLow MW Organic CompoundsMultivalent IonsMonovalent IonsFilter NanoClear
Membrane
Waste Water Product
Water
Waste Water
Product Water
NanoClear OPEX assumes access to waste heat at zero cost
The NanoClear process reduces OPEX up to 77%
UF Membrane UF Membrane RO Membrane RO Membrane
OPEX =$0.30 -
$0.40/m3
OPEX =$0.73 -
$1.73/m3
Filter
Simpler process Simple filtration to 20 μm suspended solids
OPEX With freely available waste heat, OPEX = $0.30 -
$0.40/m3
Two passes of UF + RO can easily cost 3X more
CAPEX CAPEX equal to or up to 2X greater than
competition today
Optimization, design for manufacturing will bring price within 10% at scale
High quality output from concentrated brine
Nanomaterials for Industrial Wastewater
Materials Moving Molecules © 2018 Dais Analytic Corporation. All rights reserved. www.daisanalytic.com 14 March 2018 – Slide 9
Why NanoClear?Materials and process yield many advantages
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NanoClear Impact Parameters Customer Experience
Clean contaminated water no one else can clean as well
Industrial waste, high salinity brine Opens new markets
Produce high purity water 100X cleaner than the US EPA drinking water standard Product is potable water
Reduce pre-treatment 20 µm suspended solids filtration Reduces CAPEX, OPEX
Capture waste heat Low-grade waste heat to maintain 50 – 75 °C Reduces OPEX
Low water pressure required Plastic piping instead of stainless or titanium Reduces CAPEX, OPEX
Replace multiple processes with one 1 NanoClear pass = 2 x UF + 2 x RO Lower operating cost
Capture more clean water Up to 98% capture rates Less effluent, lower operating costs
Reduce biofouling ASTM G-21 and G-22 antimicrobial and antifungal testing Higher up-time and lower costs
Nanomaterials for Industrial Wastewater
Materials Moving Molecules © 2018 Dais Analytic Corporation. All rights reserved. www.daisanalytic.com 14 March 2018 – Slide 10
Case StudyShanghai, China
1 m3/day
Waste heat provided
Objective Evaluate with high-salinity wastewater
Currently feeds to four-step nanofiltration process
Motivation Seeking cost-effective method to export salts
Unhappy with current technology limits
NanoClear to increase concentration
Results Test data covers 2017/12/12 to 2018/02/01
CAPEX = $18,129
OPEX = $0.59/m3 vs $0.84/m3 for existing process
Reduced TDS by 99.99%
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Test Parameter Unit Value
Average Flux L/hr-m2 10.3
Initial Wastewater Conductivity μS/cm 86,000
Concentrated Wastewater Conductivity μS/cm 205,000
Product Water Conductivity μS/cm 4
Nanomaterials for Industrial Wastewater
Materials Moving Molecules © 2018 Dais Analytic Corporation. All rights reserved. www.daisanalytic.com 14 March 2018 – Slide 11
Commercial ProductsNanoClear membrane evaporators are currently being shipped
Evaporators are modular Connect in parallel to achieve increased capacity
Commercial evaporator capacities from 100 – 500 L/hr
Initial test units available from 4- 20 L/hr
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SubstanceBefore (mg/L)
After (mg/L)
Percent Reduction
Calcium 3,100 0.219 100%
Cesium 5,000 0.0012 100%
Chloride 132,000 4 100%
COD 50,300 13 100%
Fluoride 167 0.19 99.9%
Iron 199 0.116 99.9%
Lead 8,830 8 99.9%
Magnesium 8,820 5.93 99.9%
Potassium 1,500 2.07 99.9%
Sodium 79,600 65.2 99.9%
Sulfate 15,100 17.8 99.9%
TDS 230,000 8 100%
Third party test results show excellent product water quality
APPLICATIONS: Onsite industrial water
Implement ZLD with re-use of water
Heat sources become water resources Use power plants, incinerators, etc. to turn wastewater into potable
Nanomaterials for Industrial Wastewater
Materials Moving Molecules © 2018 Dais Analytic Corporation. All rights reserved. www.daisanalytic.com 14 March 2018 – Slide 12
Present and FutureNumerous NanoClear pilots, advancing engineering
NanoClear status Reclaimed water field trial since 2013
Customer water evaluation since 2017
Customer pilots coming online in China
Salt production brine
Coal chemical waste
Lithium battery waste
Petrochemical wastewater
Desulphurization water
15 pilot units in total
Next gen NanoClear engineering Multiple effects to improve GOR
Vapor compression: Eliminate need for external heat
Wider application
Multiple Effect Membrane Evaporation
Multiple Effect Membrane Vapor Compression
Single Effect Membrane Evaporation
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Engineering optimization will manage heat better to expand markets
Nanomaterials for Industrial Wastewater
Materials Moving Molecules 14 March 2018 – Slide 13© 2018 Dais Analytic Corporation. All rights reserved. www.daisanalytic.com
Dais believes that “waste” heat is a valuable commodity to be used productively as it travels to the environment.
Our Aqualyte membrane uses heat to reduce wastewater discharges and produce high-purity potable water for onsite re-use.
Thank you for the chance to share these exciting products.
Dais Analytic Corporation
11552 Prosperous Drive
Odessa, FL 33556 USA
www.daisanalytic.com
USA: +1-727-375-8484
China: +86 156 5263 9206