Study on the Improved Biogas Generation Through Magnetic Field Modified Anaerobic Digestion

Abstract

— The effect of the magnetic field (MF) on the effectiveness of biogas generation was studied and it was observed that the increased intensity of magnetic field resulted in an increase in the fermentation process. A significant increase in the methane product was recorded when the medium was exposed to the magnetic field of 0.42 T. In the magnetic field digester for the first three days (lag phase) the production of the biogas was slow which was increased in 4 th to 6 th days as compared to control. 4.8 Ltr. gas production was recorded in MFF as compare to 3.4 Ltr. in the control on the 6 th day of the experiment. A decrease in pH was observed in 1 st few days of the digestion. The value of pH remains within the range of 7 to 7.3 while in control it was fluctuated between 6.4 to 7.3. NH3 – N was reduced to 87% which was 20% higher than the control. The total solid and volatile solid were reduced to 59% and 57% in MFF while in control they were reduced only 46% and 40% respectively. The content of suspended matter in slurry was reduced by 26.1% and the effectiveness of COD removal was increased as compare to control.