Penyisihan Nilai Total Petroleum Hydrocarbon (TPH) pada Tanah Tercemar Limbah Oli dengan Pemanfaatan Kasgot

Abstract

Soil contamination caused by waste oil spills is one of the environmental problems that leads to the degradation of soil quality and the disruption of microorganism activity. Hydrocarbon compounds, particularly Total Petroleum Hydrocarbon (TPH), are toxic and difficult to degrade, thus requiring effective and sustainable remediation efforts. This study aims to evaluate the effectiveness of kasgot as a bioremediation agent in reducing TPH levels in oil-contaminated soil and to assess the effect of varying kasgot concentrations on the degradation process. The results show that the addition of kasgot to oil-contaminated soil for 30 days accelerated the reduction of TPH compared to the control. The initial TPH level of 4.28% decreased to 3.432% in P0 with an efficiency of 19.8%. Greater reductions were observed in treatments with kasgot, namely 36.3% in P1, 45.6% in P2, 46.7% in P3, and 46.9% in P4. The efficiency increased significantly at higher doses, reaching 65.3% in P5 and achieving the best result in P6 with an efficiency of 87.6% and a final TPH level of 0.532%. This value meets the quality standard (<1%) according to the Regulation of the Minister of Environment No. 6 of 2021. In conclusion, kasgot effectively enhances the hydrocarbon biodegradation process and is capable of significantly reducing TPH levels, particularly at high doses (300–400 g). Kasgot has the potential to serve as an environmentally friendly bioremediation material for the restoration of oil-contaminated soils.