From: dlzc1@cox.net   
      
   Dear Krzysztof Mitko:   
      
   On Friday, November 11, 2016 at 10:59:06 AM UTC-7, Krzysztof Mitko wrote:   
   > On 2016-11-11, dlzc  wrote:   
   > > Let's say I am looking to reuse irrigation water,   
   > > for irrigation.  I will apply some prescription   
   > > dose of ozone, for pathogen inactivation (at   
   > > minimum).   
   > >   
   > > The source water contains:   
   > > - Potassium > 90 ppm   
   > > - Ammonium as NH4-N > 61 ppm   
   > > - Phosphate > 90 ppm   
   > > - soluble Iron and Manganese (not permanganate)   
   > >   are present at elevated levels, but not toxically   
   > >   high   
   > >   
   > > Need at least a factor of 10 reduction in Potassium,   
   > > "Ammonium", and Phosphate   
   > >   
   > > Will electro-deionization remove some of this?   
   >   
   > It should remove all of this and more; but be careful,   
   > because EDI looks like overkill in your case and you   
   > may end up poisoning your plants with too clean water.   
   > Have you considered something less strict, such as   
   > reverse osmosis?   
      
   RO has a few issues:   
   - too clean, but can similarly be solved by bypassing some untreated flow;   
   - the membranes are susceptible to attack by excess dissolved ozone, so now   
   you need some other filtration method upstream to kill the ozone (and catch   
   the iron and manganese);   
   - biofilm growth is a problem on the tank that is receiving this water, so the   
   membranes will be subject to clogging by stuff that a *prescription* dose of   
   ozone won't kill; finally   
   - RO has a very large percentage waste stream, and farmers try to reuse every   
   drop.   
      
   > > Water re-use is a big deal.   
   > >   
   > > Would this "large fishing net" be of any interest   
   > > to chemists?   
   >   
   > Chemists, chemical engineers, material scientists -   
   > desalination is actually pretty huge field of science.   
      
   Yes, "Poutnik" was hoping to get some discussion traffic here.   
      
   > > Where would someone go with a water chemistry   
   > > problem, for solutions?   
   >   
   > To your nearest university or business. Where are   
   > you from?   
      
   Arridzona, USA.  ASU or U of A.   
      
   I know this is right up the line for one of my former employers, but I thought   
   I'd run this flag up a public flagpole, to see if we can attract something   
   other than thieves advertising stolen electronic copies of solutions manuals   
   here...   
      
   David A. Smith   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)