Anaerobic digestion is a biological method used to convert organic wastes into a stableproduct for land application without adverse environmental effects. The biogas produced can beused as an alternative renewable energy source. Dry anaerobic digestion (> 15% TS: total solid) hasan advantage over wet digestion (<10% TS) because it allows for the use of a smaller volume ofreactor and because it reduces wastewater production. In addition, it produces a fertilizer that iseasier to transport. Performances of anaerobic digestion of animal manure-switchgrass mixture wereevaluated under dry (15% TS) and thermophilic conditions (55oC).Three different mixtures of animalmanure (swine manure, poultry manure, and dairy manure) and switchgrass were digested usingbatch-operated 1-L reactors. Swine manure test unit showed 58% VS removal during 30 day trialwhile dairy and poultry manure test units showed 24% and 31%, respectively. Over the 30 daydigestion, the swine manure test unit yielded the highest amount of methane yield 0.229 L CH4 /g VS,while, the dairy and poultry manure test units showed very poor methane yield 0.009 L CH4 /g VSand 0.002 L CH4 /g VS, respectively. These results indicate that the swine manure test unit has thehighest biogas production potential among the three different types of animal manure.
การแปล กรุณารอสักครู่..
