You can find information at: ...
Published by Tom Eckhoff, Principal at Arrigetch Environmental Consulting LLC
You can find information at: https://www.researchgate.net/post/How_to_quantify_colloidal_phase_ratio_in_an_activated_sludge
Other than for research purposes, how is this used to operate an AS plant? If you want to do a qualitative analysis for EPS use an India Ink stain.