Article ID Journal Published Year Pages File Type
7074823 Bioresource Technology 2015 33 Pages PDF
Abstract
In order to investigate the effects of feedstock ratio and organic loading rate (OLR) on the anaerobic mesophilic co-digestion of rice straw (RS) and pig manure (PM), batch bottle tests (2.5 L) were carried out at volatile solid (VS) ratios of 0:1, 1:2, 1:1, 2:1, and 1:0 (RS/PM), and continuous bench experiments (40 L) were carried out at OLRs of 3.0, 3.6, 4.2, 4.8, 6.0, 8.0, and 12.0 kg VS/(m3 d) with optimal VS ratio. The results showed that the optimal ratio was 1:1 in terms of biogas yield. Stable biogas production with an average specific biogas production of 413 L/kg VS was obtained at an OLR of 3-8 kg VS/(m3 d). Anaerobic co-digestion was severely inhibited by the accumulation of volatile fatty acids when the OLR was 12 kg VS/(m3 d). Further, light and serious foaming were observed at OLR of 8 and 12 kg VS/(m3 d), respectively.
Related Topics
Physical Sciences and Engineering Chemical Engineering Process Chemistry and Technology
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