Table 1 Estimated krapid, B0,rapid, Yrapid and kslow, B0,slow, Yslow, B0,total at different pre-treatment conditions using two-substrate model (with 95% confidence intervals).

From: Combined free nitrous acid and hydrogen peroxide pre-treatment of waste activated sludge enhances methane production via organic molecule breakdown

Pre-treatment

krapid (d−1)

B0,rapid (L CH4/kgVS added)

Yrapid

kslow (d−1)

B0,slow (L CH4/kgVS added)

Yslow

B0,total (L CH4/kgVS added)

Control

0.97 ± 0.09

70 ± 3

0.13 ± 0.01

0.06 ± 0.01

94 ± 2

0.17 ± 0.01

164 ± 3

FNA

0.63 ± 0.03

136 ± 4

0.25 ± 0.01

0.05 ± 0.01

124 ± 3

0.23 ± 0.01

260 ± 5

HP1

1.10 ± 0.11

77 ± 3

0.14 ± 0.01

0.06 ± 0.01

108 ± 2

0.20 ± 0.01

185 ± 4

HP2

1.13 ± 0.10

99 ± 3

0.18 ± 0.01

0.06 ± 0.01

102 ± 2

0.19 ± 0.01

201 ± 4

HP3

1.05 ± 0.08

95 ± 3

0.18 ± 0.01

0.06 ± 0.01

104 ± 2

0.20 ± 0.01

199 ± 3

HP4

0.90 ± 0.09

85 ± 4

0.16 ± 0.01

0.06 ± 0.01

108 ± 3

0.20 ± 0.01

193 ± 5

FNA + HP1

0.63 ± 0.03

141 ± 4

0.26 ± 0.01

0.05 ± 0.01

124 ± 2

0.23 ± 0.01

265 ± 4

FNA + HP2

0.53 ± 0.03

162 ± 5

0.30 ± 0.01

0.04 ± 0.01

117 ± 4

0.22 ± 0.01

279 ± 6

FNA + HP3

0.46 ± 0.02

185 ± 5

0.35 ± 0.01

0.04 ± 0.01

125 ± 4

0.24 ± 0.01

310 ± 6

FNA + HP4

0.48 ± 0.02

174 ± 6

0.33 ± 0.01

0.04 ± 0.01

122 ± 4

0.23 ± 0.01

296 ± 7