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Co-digestion of Waste Glycerol with Swine Manure  

Kim, Sang-Hyoun (Department of Environmental Engineering, Daegu University)
Sung, Shihwu (Department of Civil, Construction, and Environmental Engineering, Iowa State University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.18, no.2, 2010 , pp. 71-75 More about this Journal
Abstract
Production of crude glycerol from biodiesel industry is expected to exceed the commercial demand for purified glycerol in the near future. This study aimed to evaluate the feasibility of co-digestion of crude glycerol with swine manure. Crude glycerol up to 13.8 g/L was regarded as a good co-substrate for swine manure digester. It improved methane production and productivity by 90% and 120%, respectively. Methane yield of crude glycerol at the condition was estimated to be 232 mL/g. However, it inhibited methanogenic activity at above 27.5 g/L. Optimum concentration of crude glycerol for co-digestion with swine manure would be near to 13.8 g/L.
Keywords
co-digestion; glycerol; inhibition; swine manure;
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