If this opportunity is for you please get me guide about yellow sludge.
I run membrane bioreactor for Artificial starch wastewater treatment,operated @ SRT=10day and hrt=12hr. after about 10day sludge color changes from brown to yellow and COD removal efficiency decreased sharply. I guess that nitosamine produced in this MBR but don't know why this matter produced.
Thanks if you get me guide.