Comparison Study on Sonodirect and Sonoalternate Current Electrocoagulation Process for Domestic Wastewater Treatment

Table 4

Optimization of COD removal efficiency by SDCE.

Run	Factor 1	Factor 2	Factor 3	Response 1	Power consumption, KWhr/m^3
	A: pH	B: I (A)	C: time (minute)	COD removal efficiency (%)
1	7	0.4	60	85.546	6
2	5	0.4	40	86.698	4
3	9	0.5	50	81.875	10
4	3	0.5	50	88.581	19
5	9	0.4	40	78.389	7
6	5	0.4	40	86.725	10
7	7	0.4	40	82.381	11
8	9	0.5	30	79.265	18
9	3	0.5	30	86.521	17
10	5	0.4	40	86.848	16
11	3	0.3	30	82.254	15
12	7	0.4	20	78.568	10
13	5	0.2	40	78.541	17
14	7	0.4	40	82.489	11
15	9	0.3	30	79.268	14
16	7	0.4	40	82.572	12
17	3	0.3	50	84.365	13
18	9	0.4	40	80.986	9
19	5	0.5	50	87.821	8
20	3	0.3	40	83.258	13