When compared to the mesophilic digestion under thermophilic

Fig. 3. Marine microalgae and sludge co-digestion. Batch reactors, 50 °C, 20 days.Figure optionsDownload full-size imageDownload as PowerPoint slide
Fig. 4. Freshwater microalgae and sludge co-digestion. Batch reactors, 50 °C, 20 days.Figure optionsDownload full-size imageDownload as PowerPoint slide
As mentioned before, the temperature affected sewage sludge Tipranavir differently and the temperature increase improved sludge digestion. Biogas production reached 566 ± 5 mLBiogas/gVS, indicating that a 25.5% more biogas was produced by increasing temperature. Consequently, the way in which the temperature affects substrates digestion intensifies the differences between biogas production from microalgae and sludge; whereas I. galbana and S. capricornutum produced around 97% and 60% of the amount of biogas produced from sludge under mesophilic conditions, under thermophilic conditions these percentages were only 46% and 33%.