PERANCANGAN GEOMETRI DAN POWER PENGADUK UNTUK BIOREAKTOR
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Abstract
Sei Pagar's palm oil mill (PKS Sei Pagar), PTPN V Riau processes fresh fruit bunch into crude palm oil
(CPO). This processing also generates waste like empty fruit bunches (EFB), shells, fiber, and palm oil
mill effluent (POME). POME has a high content of chemical oxygen demand (COD), approximately
30,000-80,000 mg/L, which is usually fermented by bacteria. This fermentation mechanism can be
used to produce biogas containing methane in a continuous stirred tank reactor (CSTR). Since POME
or organic materials for biogas production generally contain sludge, the biogas production process
should have an agitator to mix sediment in the base reactor and improve biogas production. This
research aims to determine the agitator's specifications for the biogas pilot plant in PKS Sei Pagar,
consisting of power type and type of stirrer include diameter calculation, geometry, and power
calculation. The agitator's power and geometry are determined based on input data from the datasheet
reactor and the efficiency of the stirrer is calculated by Reynolds reynolds numbers. From this
research's calculations, an agitator geometry for the biogas pilot plant in PKS Sei Pagar had a length of
0.875 m, a width of 0.7 m, and a height of 3.5 m. This research also obtained that the motor power result
was 23.55 HP. The selection of motor power in the Biogas pilot plant's stirring process in PKS Sei Pagar
should have a standard agitator motor power of 25 HP.
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