Tight Tech Tuesday presents a tight description of what PFAS water treatment solution to use for PFAS contaminated ground waters.
Challenge:
Non complex water with no co-contaminants, and low to medium PFAS levels, and low levels of suspended particles and organics.
Solution:
Step 1: A smart pre treatment step, with a smart cleaning procedure, for removal of fine suspended particles. Think outside the old fashioned sand filter solution please, we do!
Step 2: PFAS specific Ion exchange mass (AIX), contained in pressurized filter vessels that are connected in series.
Incoming water passes the pre filter where suspended solids are polished away. A very important step to maximize the life span of the expensive AIX media, that follows.
The AIX media is installed in a two step treatment process called lead and lag filter. The PFAS is adsorbed and removed from the water in the first AIX vessel, and the second vessel handles any PFAS that desorb from the first step, something that has been noted to happen as short chain PFAS – the princesses of all contaminants – don’t like crowded areas. So together the two filters in series maximizes the capacity of the AIX filter volumes.
– And if you have organics in the water, low to medium levels, a filter vessel containing activated carbon can be used after the particle treatment step, to save the sensitive AIX media from clogging.
This solution is for us, an off the shelf product that we are ready to install where ever needed, and can handle flows from above 0 and up. The size of the vessels and volumes of medias is what will vary. As well as sizes of pumps and pipes.
