membrane distillation technology & applications hein weijdema, cto may 2014

Membrane distillation

Technology & Applications Hein Weijdema, CTO

May 2014

Confidential information. Do not distribute.

Membrane Distillation

Membrane Distillation is a breakthrough technology with unique characteristics

• It can treat almost any water source

• It runs on low-grade heat

• It produces pure distillate

• It has high recovery ratios


Technology

Products

Applications

Aquaver


A novel technology: membrane + thermal separation



Vacuum: lower boiling point = lower temp

2nd Barrier: Hydrophobic membrane

Large Surface: thin films = small volume

Condensation: re-use of heat


B

C

A

vacuum Feed water


Principle: Separation by differences in vapor

pressure using hydrophobic membranes (membrane distillation)

Characteristics• Thermal separation process: non

sensitive to concentration or particle size• Operating at low pressure

(vacuum): the process can be driven by low temperature heat

• Enlarge surface areas (A): thin water films

• Hydrophobic membranes (B): guarantee 100% separation

• Re-use of the heat (C): multi-stage process

• Plastic-made (PP & PTFE): no corrosion, dry membranes

• No leakages: friction welding manufacturing


Low temp heat

• Feed thermally separated into distillate and concentrate• System powered by low grade heat (vacuum)• Multi-stage process: re-use of heat

Concentrate

Feed Distillate

Repetition of individual units into multi-stage systems (below)



Schematic of the process

Feed

Concentrate

Distillate

Adjustable Recovery Ratio

Heat

Cooling


Technology

Products

Applications

Aquaver

Aquaver products portfolio

certified product

Aquaver MDS-1000

Processing modules

FeedInput

Distillateoutput +Brine output

Cooling

Heating

Detail of control unit


Technology

Products

Applications

Aquaver


Waste Heat

Seawater

Diesel Generator

• For small communities (up to 5000 people)

• With existing or new diesel generator installations

• For permanent or emergency situations

Sustainable desalination


Brine treatment

Technology insensitive to concentration levels or particle size

Recovery ratio (RR): close to saturation pointDistillate quality: 1µS/cm


Landfill leachateParameter Units Feed Distillate Brine

pH 4 7.0 2.7

Conductivity µS/cm 8900 <10 92000COD ppm 380 <1 4320BOD ppm 100 <1 1135HCO3 ppm 5000 <1 120SO4 ppm 5.9 <0.1 67P ppm 3.4 <0.1 40NH4 ppm 690 <0.1 7830N (total) ppm 700 <1 7950Na ppm 920 <0.05 10449Ca ppm 90 <0.01 1024Fe ppm 9 <0.02 105Al ppm 0.3 <0.05 3Mg ppm 81 <0.01 920K ppm 400 <0.1 4540B ppm 11 <0.01 125Ba ppm 0.3 <0.01 4Sr ppm 0.7 <0.01 7Zn ppm 0.05 <0.05 1

SiO2 reactive ppm 15 <1 170SiO2 total ppm 19 <1 215Cl- ppm 1500 <0.1 17040Cl2 (free) ppm 0 0 0F- ppm 3 <0.1 35TSS ppm 37 <0.01 420TOC ppm 443 <0.01 5032

Landfill leachate: landfill waste + water. It contains: organic and inorganic chemicals, heavy metals, pathogens, etc.

Recovery ratio (RR): 90%Distillate quality: <10µS/cm


Wastewater industry

Feed input:

• Salinity: 55 gr/l

• Feed contains Ca, K, Na, SiO2, HCO3, SO4, etc.

Results:

• Recovery ratio (RR) = up to 80% (approaching crystallization limit)

• Pure distillate production

Industrial and difficult-to-treat waters

Nanoparticles wastewater

Feed input:

• Concentration SiO2: 316 mg/l

• Average particle size: 45.5nm

Results:

• Recovery ratio (RR) = 96%

• Distillate: <2mg/l SiO2 (below detection limit)

• Concentrate SiO2: 8800 mg/l

Industry: Waste to Value

Waste heat

Waste water

Distillate

Concentrate

Reduction

H2O

Reduction

Value:


Industry Case 1: demiwater from waste heat

Heatdischarge

Distillate production

With Aquaver systems:

Rainwaterdischarge

Before:

demiwater


Industry Case 2: Concentration of waste or product

Heatdischarge

Discharge

Before:


Discharge



Industry Case 3: Material recovery

Heatdischarge

Discharge

Before:


Material recovery





Discharge

Before:

Industry Case 4: Combining technologies

Heatdischarge

Electricity

Discharge

Electricity


Case study I: Sustainable desalination

Gulhi, Maldives

MDS 500 at Gulhi desalination plant

Basic information Location Gulhi, Maldives

When February 2014

Customer Aquiva Foundation

Product MDS 500

Technical characteristics Clean water output m3/day 12 Feed water seawater Distillate water quality µS/cm <50 Electrical energy consumption kWh/m3 2.2 Thermal energy consumption kWh/m3 90 Uptime (for a 1 month period) % >97%

Challenge: Sustainable seawater desalination

Solution: Aquaver MDS 500 powered by waste heat from diesel generator


Case study II: Landfill leachate

Basic information Location Houthalen-Helchteren, Belgium When April 2014 Customer Group Machiels Product MDS 1000Technical characteristics Feed water Landfill leachate Feed water quality mS/cm 9-11 Clean water output m3/day 24 Distillate water quality µS/cm <30 Recovery ratio % 90 Electrical energy consumption kWh/m3 2 Thermal energy consumption kWh/m3 180 Uptime (for a 1 month period) % >95%

Challenge:Reduce landfill leachate water footprint in a robust and economical way

Solution:Aquaver MDS 1000 driven by low-grade heat

MDS 1000 at Machiels water treatment plant


Technology

Products

Applications

Aquaver


About Aquaver

• Aquaver is based in the Netherlands. Part of the Ecover Group, a global organization with a strong sustainability track record.

• Developed world’s first commercial systems based on membrane distillation.

• Products with wide range of applications.

• Marketing, sales and maintenance coordinated with our local partners.

Oosteinde 114, 2271 EJ Voorburg, The NetherlandsTel.: +31 703 002 570

E-mail: [email protected]: www.aquaver.com

membrane distillation technology & applications hein weijdema, cto may 2014

Documents

confidential information

scm slide

reuse of heat slide

novel technology

control unit slide

breakthrough technology

lowgrade heat

low temp heat feed