SolarSpring membrane distillation

A membrane material which is both hydrophobic and microporous separates the liquid from the distillate, but allows vapours to pass. The driving force for the distillation is a temperature difference, or partial vapour pressure respectively between an evaporator and a condenser channel. In between the hot and cold channel lies the distillate channel, which is separated from the other channels by a condenser film towards the condenser channel and a membrane on the evaporator side. As only vapours can pass the membrane a highly pure distillate is generated. The process operates at low temperatures of 35-95 °C and at ambient pressure, which reduces operational and maintenance costs.

Depending on the application, one of five different membrane distillation channel variants are implemented:

  • Permeate Gap MD (PGMD)
  • Direct Contact MD (DCMD)
  • Air Gap MD (AGMD)
  • Vacuum MD (VMD)
  • Vacuum Air Gap MD (VAGMD)

Advantages of MD-technology:

  • High chemical resistance towards corrosive or acidic process liquids
  • Maintenance friendly systems with simple component replacement
  • System integration into existing processes
  • Competitive economics compared to state of the art solutions
  • Cost reduction of your total process costs

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SolarSpring drinking water treatment

Our drinking water filtration systems are a smart combination of 5 stages; an Ultrafiltration module, a sandfilter, a disk filter, an activated carbon stage and an Ultraviolet-Disinfection unit. Interaction between the stages is synchronized and fully automatic – self-sufficient cleaning cycles enable a constant and smooth operation. A cubic meter of drinking water only takes 0,3 kWh of electric energy to produce at an operating pressure at 2,5 bar.


Night time operation is sustained by an AGM-Batterie which is charged during the day time through the solar panel and charge controller- all included in the package. For remote monitoring, a 3G module can be added to the Siemens Logo PLC so that you always have an eye on all the important parameters.

SolarSpring ultrafiltration

Ultrafiltration is a filtration technology that utilizes a semipermeable membrane as physical barrier, through which the feed water is pressed under pressure. Typical pore sizes of ultrafiltration systems are between 0,01 and 0,1 µm. Suspended solids and larger dissolved substances are held back whereas water and dissolved substances that are smaller than the pore size can pass through the membrane.

Ultrafiltration technology reliably retains 99,999% of microorganisms, bacteria and viruses. As it is a very efficient low- pressure process, the energy consumption is also low.

Ultrafiltration is increasingly implemented in advanced drinking water treatment processes around the globe. In comparison to standard drinking water treatment methods, ultrafiltration has many advantages:

  • Consistent quality of the produced drinking water
  • Uncomplicated automation
  • Low surface requirements
  • Low operational costs