The Gompertz model constants for different pH values^a.

pH	P (mL)	R m (mL h−1)	λ (h)	R 2
Uncontrolled	7.39 ± 0.02	0.63 ± 0.02	−2.1 ± 0.27	0.96
4.0	188.43 ± 0.98	4.07 ± 0.08	8.27 ± 0.49	0.96
5.0	502.94 ± 6.44	15.19 ± 1.02	16.46 ± 1.17	0.94
6.0	1106.4 ± 8.9	47.93 ± 1.84	55.9 ± 0.45	0.99
7.0	1381.53 ± 11.3	38.68 ± 0.93	32.57 ± 0.66	0.98

^aMean ± standard error.