Membrane

The membrane is the heart of the treatment process which do the separation work.
AGSHYA membrane is a novel kind of membrane designed and developed to improve the already known membrane distillation (MD) liquid separation process instead of using a commercial membrane designed for other processes to reach several times more productivity and less energy consumption.
For the time being, our membrane form is flat sheet, the next step is the hollow fiber and tubular membranes.

Module

The Module is the assembled body structure that make the streams of the liquids on both sides of membrane flow efficiently to enable the membrane to act properly with liquid inlets and outlets and internal parts that make the flow always turbulent to get the maximum out of the membrane and keep the pressure and thermal loses as minimum as possible.
We Design and improve, assemble and use a proper module exclusively for membrane distillation (MD). For the flat sheet membranes, there are two main kinds of modules:
Cylindrical mostly spiral wound
Pate and frame, The hollow fiber and tubular membranes modules are mostly cylindrical form

Treatment Stations

The engineering of connecting the feed (raw material) and the permeate (product) to the outside environment, with all modules, heating and cooling, pumping, fittings, flow and measure instrumentation is simply the treatment included any additional parts or systems to use the renewable energies to complete the treatment tasks with the minimum approaching to zero energy consumption

Technology

Membrane distillation (MD) is a hybrid of thermal and membrane desalination processes. MD is a relatively new process that is being investigated worldwide as a low cost and energy saving alternative to conventional desalination techniques. Briefly, MD is a thermally driven process in which a micro-porous membrane acts as a physical support separating a warm solution from a cooler chamber, which contains either a liquid or a gas. As the process is non-isothermal, vapour molecules (water vapour in the case of concentrating non-volatile solutes) migrate through the membrane pores from the high to the low vapour pressure side; that is, from the warmer to the cooler compartment. Generally, the transport mechanism of MD can be summarized in the following steps:

  • Evaporation of water at the warm feed side of the membrane.
  • Migration of water vapour through the non-wetted pores.
  • Condensation of water vapour transported at the permeate side of the membrane.

The main requirements of this process are that the membrane must not be wetted and only vapour is present in the pores.

MD does not require a high-pressure feed like reverse osmosis. It can process very high salinity brines (salt water solutions) and can be performed on a large or small scale. It can be used in many ways depending on how liquid is recovered. One basic configuration is direct contact membrane distillation (DCMD), in which salty water (hot) and fresh water (cold) are in direct contact with both ends of the membranes.

And to have a simple idea how is the Membrane Distillation (MD) in Direct Contact Membrane Distillation (DCMD) happen, this drawing is telling more than words: