E. Statistical analysis
The study effect of addition EM ball on the wastewater
treatment can be divided into three treatments are set A,
adding only the air-flow. Set B is the water sample was added
only EM ball from our laboratory room for 108 g in water
samples 120 liters. Set C is the water sample was added only
commercial EM ball for 108 g in water samples 120 liters. The
efficiency of all experiment were analyzed and compared. A
relative comparison of efficiency of water treatment is used to
indicate the relationship of the parameters analyzed using
ANOVAs in DO BOD and COD. When analyzed using
ANOVAs to compare the relative efficiency of water
treatment with the three sets of DO, BOD and COD
parameters. The results show statistically insignificant
differences at 95% confident as shown in TABLE III.