Influence of Granular Activated Carbon Addition on Methane Production in Dry and Semidry Anaerobic Digestion of Swine Manure.

ABSTRACT: This work investigated the effect of granular activated carbon (GAC) on methane-rich biogas production in semidry (10% total solids, TS) and dry (15% TS) anaerobic digestion (AD) of swine manure. The conductive material GAC can improve methane production exponentially in AD, even without pretreatment. However, in semidry and dry conditions, there was no significant difference in methane production yield when using raw or pretreated swine manure with the addition of 20 g/L GAC. For this condition, when using the pretreated substrate, the main observed effect was related to the lag phase increase from 6.5 to 10.6 days and from 10.4 to 32.0 days at 10 and 15% TS, respectively. In semidry AD, with pretreated manure, 10 g/L GAC addition yielded 190 mL CH₄/gVS, a value 21% higher than

SUBMITTER: de Sousa E Silva A 

PROVIDER: S-EPMC12268741 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature