Table 5: 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 waste and chicken rumen at different agitation speed

Models	Constant Variables	Agitation (rpm)
		30	40	50	60	70
Logistic Kinetic	a	5.065	4.819	4.582	4.285	3.858
	b	-5.065	-4.819	-4.582	-4.285	-3.858
	k(day-1)	9.872	9.963	10.05	10.14	10.26
	R2	0.4317	0.4218	0.4155	0.3842	0.4665
Exponential Rise to Maximum	A(dm3/gm)	7.002	6.732	6.437	6.293	5.156
	k(day-1)	0.04731	0.04333	0.04222	0.04167	0.03748
	R2	0.9767	0.9676	0.9644	0.9621	0.9519
Modified Gompartz Kinetic	A(dm3/gm)	5.978	5.724	5.451	5.12	4.798
	rm(dm3/gm/day)	152.7	60.58	30.95	16.9	0.9342
	λ(day)	0.4641	0.4755	0.4832	0.4843	1.485
	R2	0.9713	0.9699	0.9682	0.9524	0.9937