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Membrane distillation Technology & Applications Hein Weijdema, CTO May 2014.

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Presentation on theme: "Membrane distillation Technology & Applications Hein Weijdema, CTO May 2014."— Presentation transcript:

1 Membrane distillation Technology & Applications Hein Weijdema, CTO May 2014

2 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

3 Confidential information. Do not distribute. Technology Products Applications Aquaver

4 Confidential information. Do not distribute. A novel technology: membrane + thermal separation

5 Confidential information. Do not distribute. A novel technology: membrane + thermal separation Vacuum: lower boiling point = lower temp 2 nd Barrier: Hydrophobic membrane Large Surface: thin films = small volume Condensation: re-use of heat

6 Confidential information. Do not distribute. B C A vacuumFeed water A novel technology: membrane + thermal separation 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

7 Confidential information. Do not distribute. 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) A novel technology: membrane + thermal separation

8 Confidential information. Do not distribute. Schematic of the process Feed Concentrate Distillate Adjustable Recovery Ratio Heat Cooling

9 Confidential information. Do not distribute. Technology Products Applications Aquaver

10 Aquaver products portfolio certified product

11 Aquaver MDS-1000 Processing modules Feed Input Distillate output + Brine output Cooling Heating

12 Detail of control unit

13 Confidential information. Do not distribute. Technology Products Applications Aquaver

14 Confidential information. Do not distribute. 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

15 Confidential information. Do not distribute. Brine treatment Technology insensitive to concentration levels or particle size Recovery ratio (RR): close to saturation point Distillate quality:  1µS/cm

16 Confidential information. Do not distribute. Landfill leachate ParameterUnitsFeedDistillateBrine pH Conductivity µS/cm 8900< COD ppm 380<14320 BOD ppm 100<11135 HCO 3 ppm 5000<1120 SO 4 ppm 5.9<0.167 P ppm 3.4<0.140 NH 4 ppm 690< N (total) ppm 700<17950 Na ppm 920< Ca ppm 90< Fe ppm 9< Al ppm 0.3<0.053 Mg ppm 81< K ppm 400< B ppm 11< Ba ppm 0.3<0.014 Sr ppm 0.7<0.017 Zn ppm 0.05<0.051 SiO 2 reactive ppm 15<1170 SiO 2 total ppm 19<1215 Cl - ppm 1500< Cl 2 (free) ppm 000 F-F- 3<0.135 TSS ppm 37< TOC ppm 443< Landfill leachate: landfill waste + water. It contains: organic and inorganic chemicals, heavy metals, pathogens, etc. Recovery ratio (RR): 90% Distillate quality: <10µS/cm

17 Confidential information. Do not distribute. Wastewater industry Feed input: Salinity: 55 gr/l Feed contains Ca, K, Na, SiO 2, HCO 3, SO 4, 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 SiO 2 : 316 mg/l Average particle size: 45.5nm Results: Recovery ratio (RR) = 96% Distillate: <2mg/l SiO 2 (below detection limit) Concentrate SiO 2 : 8800 mg/l

18 Industry: Waste to Value Waste heat Waste water Distillate Concentrate Reduction H2OH2O Value:

19 Confidential information. Do not distribute. Industry Case 1: demiwater from waste heat Heat discharge Distillate production With Aquaver systems: Rainwater discharge Before: demiwater

20 Confidential information. Do not distribute. Industry Case 2: Concentration of waste or product Heat discharge Discharge Before: Distillate production Discharge With Aquaver systems:

21 Confidential information. Do not distribute. Industry Case 3: Material recovery Heat discharge Discharge Before: Distillate production Material recovery With Aquaver systems:

22 Confidential information. Do not distribute. Distillate production With Aquaver systems: Discharge Before: Industry Case 4: Combining technologies Heat discharge Electricity Discharge Electricity

23 Confidential information. Do not distribute. 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 m 3 /day 12 Feed water seawater Distillate water quality µS/cm <50 Electrical energy consumption kWh/m Thermal energy consumption kWh/m 3 90 Uptime (for a 1 month period) % >97% Challenge: Sustainable seawater desalination Solution: Aquaver MDS 500 powered by waste heat from diesel generator

24 Confidential information. Do not distribute. Case study II: Landfill leachate Basic information Location Houthalen-Helchteren, Belgium When April 2014 Customer Group Machiels Product MDS 1000 Technical characteristics Feed water Landfill leachate Feed water quality mS/cm 9-11 Clean water output m 3 /day 24 Distillate water quality µS/cm <30 Recovery ratio % 90 Electrical energy consumption kWh/m 3 2 Thermal energy consumption kWh/m 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

25 Confidential information. Do not distribute. Technology Products Applications Aquaver

26 Confidential information. Do not distribute. 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.

27 Oosteinde 114, 2271 EJ Voorburg, The Netherlands Tel.: Website:


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