RO Chemicals can help or harm the performance of RO plants.  You have to know what chemicals to use and where to add them in your feed water pretreatment.  I get lots of calls about pretreatment processes problems with RO chemicals and RO plant design.  If you have been an operator for a while, you probably have … More

I’ve been putting together a great new page for our Now U Know section so my blog entry will be a little shorter than last week. I had a call from one of our distributors this week.  He was setting up a large shipment of King Lee Technologies membrane cleaners to a South American organization.  His client wanted … More

We discussed membrane autopsies in our last blog.  Now let’s discuss what you should get in a membrane autopsy report so that your goal of solving your problem, or at least making progress, is met. First, look for the wet test results for the membrane elements sent in for autopsy.  This test is done before the … More

Membrane autopsies are all about getting enough additional information so that the site problem can be solved.  You can tell from the membrane system information if the problem is low productivity or salt rejection or increase in differential pressure.  You know that loss of productivity is due to fouling-scaling; that increase in salt passage is … More

Since we sell membrane cleaners, we get questions on how to get the job done.  First, we tell our clients to clean when the membranes need to be cleaned.  This probably sounds obvious, but many times we hear that operators are cleaning on a set schedule. Usually this results in either under cleaning (allowing foulant to … More

This week two membrane system operators called.  They wanted to talk about using chem pumps.  Antiscalant or other chemicals such as acid, or flocculants, are added to feed water streams as part of the pretreatment system.  To get the chemical into the feed, you need a pump that can accurately meter out and inject the … More

My last post topic was “can antiscalants affect product water quality?”.  I answered that no antiscalant which was certified under ANSI/NSF Standard 60 can past through the membrane, so it has no effect on the quality of the product water.  I said that this was the simple answer.  The answer is simple because it just answers … More

A RO equipment OEM engineer called me today to ask if the permeate quality was affected by antiscalants.  He had been contacted by customer who was seeing his product water TDS (Total Dissolved Solids) go from 9 to over 200 ppm in a just a week.  This is a big jump! The customer was new to using … More

Hello and welcome to King Lee.  I’ve included a blog on our web site so that we can have a conversation about membrane technology. As the technical support engineer at King Lee, I answered thousands of questions over the past twelve years.  These questions come from managers and operators, consulting engineers, and academics. You might … More