In North Carolina much of the feed is imported into the state and hogs exported, leaving the manure in state as a result of the production process. This study examined a anaerobic biofilm digestor with intermittent aeration, and evaluated the effectiveness of energy recovery, organics reduction and nutrient removal from swine effluent. A significant reduction in organics (66% COD and 56% TOC) and suspended solids (68% TSS and 72% VSS) was realized in the anaerobic digestor, and biogas production was 43.2 ml per litre of digestor volume per day, achieving a methane content of 85%. Organics reduction and strong nitrification were achieved through the aeration tank, however no significant denitrification was observed in the intermittent aeration process.









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