Your 1st step is to copy what ...
Published by Terry Scheurman, President at Applied Specialties, Inc.
Your 1st step is to copy what others have been doing when doing this very thing. Those that have been successfully recovering effluent from an Active sludge plant all use lime softening. There are more than a handful of reasons why. After lime softening, it is best to use RO. You will want to use CO2 to reduce the pH after the lime softening. If you have the option, you will want to consider 2 stage lime softening since you are planning on using the water as boiler make-up. You will absolutely need to consider a biocide application for the feed to the RO unless you use 2 stage softening. The permeate from the RO needs to go to a mixed bed IX. The RO reject needs to go to an evaporator or evap ponds so that you do not build the salt concentration too high and kill your bugs in the bug plant. Use the painful mistakes of others. There is no reason not to copy success.