Production of acetic acid and volatile fatty acids from lime-pretreated bagasse/chicken manure

High-solids anaerobic fermentation of lime-pretreated Bagasse/Chicken manure (80: 20) were investigated to determine the feasibility of these feedstock for producing acetic acid and other volatile fatty acids. Batch and countercurrent fermentation were performed. The influence of solid loading rate (SLR), liquid retention time (LRT) and dilution rate (D) on the performance of the bioreactor was studied. The highest productivity of 1.49 g total acid / (L. of liquid .d) for a.SLR = 6 g VS/(L. of liquid .d) and D = 0.14 d-1, was achieved. On the other hand, the highest acid concentration of 12.5 g total acid / L. of liquid and maximum yield (0.3 g total acid / g VS fed) for a SLR = 3 g VS / (L. of liquid .d) and D = 0.07d-1, was achieved. The Continuum Particle Distribution Modeling (CPDM) method of Loescher was applied to Bagasse / Chicken manure fermentation. The model agreed with experimental final acid concentrations with standard error (0.62 - 8.26), and specific reaction rates with standard error (0.001).

Production of acetic acid and volatile fatty acids from lime-pretreated bagasse/chicken manure Academic Article