Introduction
Materials and methods
Materials
Material | Parameter | Value |
---|---|---|
Wastepaper | Total COD (g/kg) | 1046.7 |
TS (%) | 92.2 | |
VS (%TS) | 95.0 | |
Rumen fluid | Total COD (g/L) | 14.3 |
Dissolved COD (g/L) | 8.6 | |
TS (g/L) | 6.2 | |
VS (%TS) | 68.6 | |
Seed sludge | Total COD (g/L) | 11.3 |
Dissolved COD (g/L) | 0.4 | |
TS (%) | 1.5 | |
VS (%TS) | 72.2 |
SDS addition and pretreatment of wastepaper with rumen fluid
Anaerobic digestion
Chemical measurements
Evaluation of cell viability
Results
Rumen ciliate viability after pretreatment
Solubilization of waste paper during pretreatment
Degradation of waste paper
Pretreatment | Methane fermentation | |||
---|---|---|---|---|
TS (%) | VS (%) | TS (%) | VS (%) | |
Control | 9.0 | 17.7 | 68.6 | 74.1 |
SDS 0.1 g/L | 8.5 | 15.5 | 69.5 | 74.8 |
SDS 0.2 g/L | 7.1 | 17.8 | 70.2 | 76.6 |
SDS 0.4 g/L | 6.9 | 18.6 | 69.7 | 71.7 |
SDS 0.8 g/L | 8.4 | 17.9 | 67.4 | 67.8 |
VFA production during methane fermentation
Methane production from waste paper
Methane production (mL) | Methane yield (%) | T80 (days) | ||
---|---|---|---|---|
Pretreatment | Methane fermentation | |||
Control | 9.5 | 1700.7 | 59.3 | 23.5 |
SDS 0.1 g/L | 9.7 | 1862.3 | 64.7 | 16.0 |
SDS 0.2 g/L | 5.4 | 1892.3 | 65.3 | 15.5 |
SDS 0.4 g/L | 0.4 | 383.2 | 13.1 | 8.0 |
SDS 0.8 g/L | 0.0 | 346.1 | 11.6 | 21.0 |