Abstract

Waste water in Indonesia especially fromindustries contains phenol around 16 ppm which is higher thanregulated standard quality of phenol in waste water (2 ppm).Phenol is a toxic aromatic hydrocarbon which is dangerous anddifficult to degrade. Therefore, we conduct a study aboutbiodegradation process of hydrocarbon (phenol) liquid wasteusing bacterial consortium from cattle rumen. In this paper, theresearchers discussed how to produce, effect of incubationmedium, and identification of bacterial consortium which isisolated from the cattle rumen and petroleum sludge, both solidand liquid form. Based on gram-staining analysis, cattle rumenbacteria are gram-positive and gram-negative bacteria. Phenolbiodegradation using cattle rumen bacterial consortium, theobtained k value sure 0.174; 1.125; 1,527; 0.007 and 0.116,which are based on the concentration of phenol of 12, 24, 48, 72and 120. Similarly, for petroleum sludge, the obtained k valuesrespectively are 0.212; 1.029; 1.26; 1.74 and 2.196.