TABLE 2.
pH range, total ammonia concentration, and ammonia recoverya
| Material | Treatment | 34°C
|
24°C
|
14°C
|
4°C
|
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| pH rangea | NHtot (mM)b | NHrecovery (%)c | pH range | NHtot (mM) | NHrecovery (%) | pH range | NHtot (mM) | NHrecovery (%) | pH range | NHtot (mM) | NHrecovery (%) | ||
| Feces | U2 | 9.0-8.8 | 862 ± 72 | 83 ± 7 | 9.1-8.9 | 675 ± 68 | 67 ± 7 | ||||||
| U1 | 8.8-8.7 | 541 ± 8 | 84 ± 1 | 8.9-8.7 | 441 ± 29 | 73 ± 5 | |||||||
| AU1 | 12.8-12.7 | 72 ± 6 | 15 ± 1 | 10.0-9.6 | 261 ± 31 | 51 ± 6 | |||||||
| A | 12.8-12.7 | 71 ± 6 | 78 ± 6 | 10.5-9.7 | 60 ± 6 | 65 ± 6 | |||||||
| U0 | 8.3-8.1 | 247 ± 9 | 8.3-8.0 | 214 ± 4 | |||||||||
| Urine | 1:0 | 9.0 | 439 ± 16 | 9.0 | 415 ± 30 | 9.1 | 419 ± 32 | 9.1 | 432 ± 12 | ||||
| 1:1 | 8.9-8.8 | 203 ± 3 | 92 ± 6 | 8.9-8.7 | 219 ± 5 | 97 ± 3 | 8.9-8.8 | 205 ± 3 | 101 ± 6 | 8.9-8.8 | 207 ± 2 | 105 ± 2 | |
| 1:3 | 8.7 | 131 ± 1a | 8.7 | 107 ± 9 | 9.0 | 103 ± 7 | 9.1 | 105 ± 8 | |||||
a
Initial pH (maximum) to final pH (minimum) in fecal material.
b
Total ammonia concentration (NH3 + NH4+) in fecal material measured on day 35 (24°C) and day 3 (34°C) and in urine on day 182 (dilution 1:1) and day 150 (dilutions 1:0 and 1:3). Values are means ± standard deviations.
c
For fecal matter, recovery of ammonia is measured ammonia compared with the expected amount according to additions of urea, while for urine the fraction is ammonia measured at day 182 (1:1) compared with day 1. Values are means ± standard deviations.