TABLE 2.
EPS component analysis for each extraction method
| Sample and reactor | Pretreatment | Mean value (mg g−1 VSS−1) ± SEa
|
|||
|---|---|---|---|---|---|
| Protein | Carbohydrates | TOC | PN/PSb | ||
| NaOH extraction | |||||
| Reactor 1 | Nonhomogenized | 199 ± 28 | 26 ± 9 | 227 ± 44 | 7.8 |
| Reactor 1 | Homogenized | 190 ± 28 | 30 ± 9 | 234 ± 44 | 6.4 |
| Reactor 2 | Nonhomogenized | 185 ± 28 | 18 ± 9 | 86 ± 44 | 10.9 |
| Reactor 2 | Homogenized | 210 ± 28 | 26 ± 9 | 203 ± 44 | 7.9 |
| Dowex extraction | |||||
| Reactor 1 | Nonhomogenized | 39 ± 5 | 5 ± 2 | 33 ± 4 | 7.5 |
| Reactor 1 | Homogenized | 50 ± 5 | 8 ± 2 | 44 ± 4 | 6.6 |
| Reactor 2 | Nonhomogenized | 23 ± 5 | 3 ± 2 | 15 ± 4 | 7.6 |
| Reactor 2 | Homogenized | 73 ± 5 | 11 ± 2 | 69 ± 4 | 6.7 |
a
Standard errors were calculated based on separate extractions of triplicate samples.
b
PN/PS, protein/polysaccharide ratio.