Table 3: Value of model constants and coefficient of determination (R²) obtained from kinetic models fitted to cumulative biogas production data of biomethanization of mixed animal wastes co-digested with pineapple fruit wastes and chicken rumen at different feed/inoculums ratio.

Models	Constant Variables	Feed/Inoculum Ratio
		1:1	1:2	1:3	2:1	3:1
Logistic Kinetic	a	3.858	5.216	5.396	5.181	5.205
	b	-3.858	-5.216	-5.396	-5.181	-5.205
	k(day-1)	10.26	9.814	9.74	9.827	9.818
	R2	0.4665	0.4155	0.4427	0.4443	0.3884
Exponential Rise to Maximum	A(dm3/gm)	5.156	7.292	7.556	7.063	7.385
	k(day-1)	0.04223	0.04492	0.04731	0.03857	0.04443
	R2	0.9767	0.959	0.9714	0.9702	0.9517
Modified Gompertz Kinetic	A(dm3/gm)	4.798	6.161	6.844	6.05	6.233
	rm(dm3/gm/day)	0.02682	0.9342	27.5	0.02417	0.03591
	λ(day)	1.485	0.9813	0.5067	0.5011	0.4918
	R2	0.9937	0.964	0.9936	0.9708	0.9568