Modeling and Multiresponse Optimization for Anaerobic Codigestion of Oil Refinery Wastewater and Chicken Manure by Using Artificial Neural Network and the Taguchi Method

Table 1

Chemical characteristics of the utilized substrates.

Characteristics	Substrates
	Sonicated ORWW with different time durations			CM	Inoculum
	0 min	15 min	30 min
TS (%)	1.73 ± 0.03	1.81 ± 0.01	1.94 ± 0.06	33.86 ± 2.50	2.51 ± 0.10
VS (% of TS)	2.69 ± 0.70	2.82 ± 0.45	2.77 ± 0.23	65.35 ± 0.60	49.35 ± 1.00
TOC (g/Kg of TS)	30.28 ± 2.10	31.14 ± 1.89	31.09 ± 0.51	440.22 ± 3.50	36.81 ± 4.30
OM (g/Kg of TS)	52.17 ± 2.95	53.65 ± 2.66	53.57 ± 0.72	758.49 ± 4.94	63.42 ± 6.05
TN (g/Kg of TS)	0.20 ± 0.01	0.19 ± 0.03	0.21 ± 0.12	42.27 ± 0.10	2.04 ± 0.20
C : N ratio	151.40 : 1	163.89 : 1	148.05 : 1	10.41 : 1	17.71 : 1

Mean ± Stdev.