The wastewater is separated into fluid and solid matter (fat). The fat is transferred to a fat dome where they also throw EM in twice a week. Fat Dome Before the introduction of EM, the fat dome could not process separated fat well. The water used to remain white even after going through the fat dome, and its odour was terrible. With EM application, the dome performs its role perfectly to treat the fat with fermentation and the processed water became grey, instead of white colour. (*The colour of the water is usually darker when the fat is processed well.) The fat is fermented with EM in the dome and put back to anaerobic tanks. After going through 2 different anaerobic tanks, the water is transferred to aerobic tanks for the rest of the treatment process.