[Retracted] Kinetics of Sludge Superheated Steam Drying and Optimization of Process Parameters

Table 3

Fitting results of restoration stage of sludge superheated steam drying under different drying conditions.

Fixed factor condition	Variable factor condition	Model coefficients k0	R^2	χ^2 ×10^−6	RMSE ×10^−3
6 mm, 22 m^3/h	180°C	−7.02597 × 10^−4	0.9905	5.70518	2.39
	195°C	−8.00787 × 10^−4	0.98437	7.70733	2.78
	220°C	−8.32655 × 10^−4	0.9754	11.8885	3.45
	260°C	−9.16322 × 10^−4	0.98018	5.18684	2.28
220°C, 22 m^3/h	2 mm	−0.00301	0.98283	17.3144	4.16
	3.5 mm	−0.00131	0.94455	26.0287	5.1
	6 mm	−9.32495 × 10^−4	0.98895	4.01967	2
	10 mm	−5.40755 × 10^−4	0.95479	11.6066	3.41
220°C, 6 mm	22 m^3/h	−7.95143 × 10^−4	0.98769	7.281	2.7
	29 m^3/h	−8.51206 × 10^−4	0.96472	14.2672	3.78
	36 m^3/h	−8.0649 × 10^−4	0.91675	31.8707	5.65
	40 m^3/h	−0.00111	0.96107	8.79375	2.97