The influence analysis of cow dung additional at biogas production of Palm Oil Mill Effluent (POME)

Abstract

Palm Oil Mill Effluent (POME) with the anaerobic fermentation method can be converted into biogas. The aim of this study was to determine the effect of adding cow dung to biogas production from POME. This study used a pure POME and mixture of POME and cow dung. The ratio used POME mixture: Cow dung 90:10, 80:20, and 70:30. This fermentation was carried out 25 days with a digester with a volume of 10 L which was equipped with a stirrer. Before fermentation, some measurements were done, initial measurements of pH, temperature, C levels, N levels, C / N ratio and total Volatile solid (TVS) POME and also a mixture of POME and cow dung to determine the chemical properties of the two materials. During the fermentation process, pH and temperature were reduced. The biogas produced was measured on the 10th, 15th, 20th and 25th day using a Gas Chromatography. From these measurements it was found that a mixture of POME and 70:30 cow manure on the 20th day produced the greatest levels of biogas which was 300.25 ppm. whereas pure POME with the same time only produces 210.4 ppm. This means that the addition of cow dung can increase biogas production.