Phd High recovery and chemical-free desalination using advanced electrodialysis schemes

Phd High recovery and chemical-free desalination using advanced electrodialysis schemes


Phd Excessive restoration and chemical-free desalination utilizing superior electrodialysis schemes

Analysis challenges – Regardless of many research and potential improvements are aiming for the best attainable water restoration, even as much as zero liquid discharge (ZLD), real-life purposes keep restricted. Typically these ZLD schemes embody recovering stable salts (or organics) from brines, which solely sometimes will present an affordable enterprise case when the plant proprietor can reuse these onsite safely and sustainably. Applied sciences concerned use further chemical compounds for regeneration, acids and bases for momentary pH changes, antiscalants and dispersants, cleansing chemical compounds. Furthermore, excessive quantities of power per kilogram of recovered stable and finally per water produced are employed. On this undertaking, we purpose to create a desalination scheme that splits the saline supply water into demineralized product water and a number of concentrated waste streams, with the specified specs for eventual post-processing and recycling. We purpose to realize these objectives with out including (excessive quantities of) salts or different chemical compounds, to keep away from accumulation of sodium and/or chloride in brines onsite or within the product water for first and second use. Superior electrodialysis (ED) configurations allow to realize desalination by manipulating ionic compositions with the feed water and electrical power as the only inputs.

Goals and methodology – On this undertaking, we’ll advance on chemical-free ED configurations in hybrid desalination schemes. Feed water compositions (total salinity, monovalent-divalent ionic ratios; eventual useful parts or natural molecules) will outline the probabilities to represent the perfect output streams for given use instances from our industrial companions. For chosen instances, an ED stack configuration can be designed and examined, primarily based on mass stability and transport price modelling. The selectivity wanted to acquire the a number of focus streams can be reached by making use of selective membranes (e.g. bi-polar, monovalent/divalent selective membranes) and by controling operational situations. Enter parameters of the mannequin can be primarily based on literature and membrane charachterization experiments. The design can be realized in a laboratory scale ED setup. The setup can be run with each nicely outlined salt water mixtures to validate the mannequin assumptions, and with water from the chosen instances as a prelimaniry take a look at for a pilot scale research.

We ask

  • MSc diploma in chemical engineering or a associated self-discipline;
  • Data of water chemistry, electrochemistry, membrane expertise, and course of modeling;
  • Skill to carry out water high quality experiments and expertise evaluation at laboratory and pilot scale.

We provide

Wageningen College & Analysis provides wonderful phrases of employment. Just a few highlights from our Collective Labour Settlement embody:

  • sabbatical depart, research depart, and paid parental depart;
  • working hours that may be mentioned and organized in order that they permit for the absolute best work-life stability;
  • the choice to accrue further vacation hours by working extra, as much as 40 hours per week;
  • there’s a sturdy deal with vitality and you can also make use of the sports activities amenities accessible on campus for a small price;
  • a hard and fast December bonus of 8.3%;
  • wonderful pension scheme.

Along with these first-rate worker advantages, you’ll in fact obtain an excellent wage.

Extra info

Educational supervisors: Prof. Dr. Huub H.M. Rijnaarts (promotor), and Dr. Harry Bruning (Environmental Know-how (ETE), Wageningen College)
Wetsus supervisor: Dr. Jan W. Publish (Theme Coordinator Desalination)

You’ll be able to apply by choosing your emptiness on Purposes on to WUR won’t be considered. The process to use is written intimately on

Solely purposes which might be full, in English, and submitted through the applying webpage earlier than the deadline can be thought of eligible.

Key phrases: Electrodialysis metathesis (EDM), bipolar membrane electrodialysis (BPMED), Selective electrodialysis (SED), ion-selective membranes, bipolar membranes


Desalination has change into a big various water supply because of the rising water demand and insufficient standard water sources in lots of areas. Desalination removes extra salts and different dissolved solids from water to get clear water for human utilization. Analysis and improvement and ensuing improvements typically purpose to decrease power consumption or cut back desalination prices. Nonetheless, with the accessible mature membrane and thermal applied sciences, there appears to not be a lot room for enhancements in each points.
Thus, we imagine different drivers for innovation might be: (1) reducing the environmental impression by avoiding chemical compounds additions and results of brine discharge, (2) creating useful water streams or mining of the precious compounds from brines, whereas avoiding extra quantities of invaluable compounds, and (3) rising the added worth of already used desalted water for a second use in agriculture or aquifer recharge.

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