For lab testing purposes we simply dose our concentrated chemistry directly into the liquid wastes at 1%v/v. So if you have 40 mls of waste add 0.4 mls of SAS product. Shake well for 5 to 10 seconds in order to thoroughly mix. then centrifuge in a benchtop centrifuge at circa 3000 rpm for 2 - 3 minutes and observe any separation results. Sometimes shining a light behind the sample can show better separation as solids often stick to the walls of the centrifuge tubes making viewing of phase separation difficult.
SAS products tend to be incompatible with polymers. Polymers should NOT be used prior to dosing with SAS product as they prevent the SAS product from working. SAS product should always be used first. If polymer needs to be added it should only be added in small quantities AFTER the SAS chemistry has been dosed and mixed.
Once we know the chemistry works the only way to move forward is to run extended and repeated field tests in order to determine optimal chemical dosing and mixing. Accurate prediction of required dose levels cannot be made from running lab tests. The ONLY way to get this level of detail is to run extended and repeated field batch tests in order to generate this data and allow for inter batch variability. Many aspects change from lab testing and field work. Field work is also required to see just how low a chemical dose we can get away with. Clearly the lower the chemical dose rate the more profitable it will be for our customers.
For more information please visit SAS Environmental Services.