3 years ago

Effect of ultrasonic pretreatment of the dairy manure on the electricity generation of microbial fuel cell

Effect of ultrasonic pretreatment of the dairy manure on the electricity generation of microbial fuel cell
Microbial fuel cells (MFCs) represent a promising emerging technology for organic waste treatment and bioelectricity could be obtained simultaneously. In order to effectively develop the resource and energy in dairy manure, two-compartment MFC using dairy manure as main substrate (DMMFC) were proposed and the effect of ultrasonic pretreatment on the electricity generation of DMMFC was studied comprehensively. The results showed that when the ultrasonic power for the pretreatment of dairy manure was 600W, DMMFC showed the highest closed-circuit voltage (CCV) of 212mV at solid content of 10%. With external loading of 1000Ω, the power densities reached 29.9mW/m2, 56.2mW/m2, 102mW/m2 and 72.6mW/m2 at the ultrasonic power of 0, 300, 600, and 900W, respectively. The maximum current density arrived 102mA/m2 on the 14th day when the dairy manure was treated 20min under the ultrasonic of 600W. After 203 d, removal rate of chemical oxygen demand (COD) arrived 74.6%, and the energy of over 10.5kJ/kg (dry manure) was obtained.

Publisher URL: www.sciencedirect.com/science

DOI: S1369703X17302656

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