CD Skripsi
Bioremediasi Tanah Terkontaminasi Minyak Bumi Dengan Variasi Rasio Nutrien Dan Surfaktan Sebagai Biostimulan
ABSTRACT
Petroleum spills on soil can cause significant environmental impacts and pose a great danger to humans and other living things. Petroleum is a hazardous and toxic material so that petroleum contaminated soil needs to be managed properly. Bioremediation is the most efficient process in degrading petroleum in soil by utilizing microorganisms. Microorganisms require nutrients C, N, and P as energy sources for cell growth and energy transfer so that the ratio of nutrients C:N:P needs to be added and optimized in order to accelerate the bioremediation process. This research aims to obtain the optimum ratio of the addition of urea, TSP, and surfactant fertilizers as biostimulants in the bioremediation process of petroleum-contaminated soil. In this research, the bioremediation process was carried out using urea and TSP fertilizers with variations in nutrient ratios of 100:6,5:1, 100:6,5:2, 100:7.5:1, 100:7.5:2, 100:10:1, 100:10:2, 100:12.5:1, 100:12.5:2, and the addition of surfactant with a concentration of 14 mg/L. Soil environmental conditions such as pH, temperature, and humidity were observed during the bioremediation process. total plate count (TPC) test was conducted to determine the number of bacterial colonies in the soil. Total petroleum hydrocarbon (TPH) test was conducted to measure the concentration of petroleum in the soil. The results of the 9-week research showed that the nutrient ratio of 100:10:1 was the optimal ratio in degrading petroleum contaminated soil with a TPH removal efficiency of 85.67%. The application of urea, TSP, and surfactant fertilizers as biostimulants gave good results because they could increase nutrients and hydrocarbon bioavailability during the bioremediation process.
Keywords: Bioremediation, petroleum, TPH, nutrient ratio, surfactant
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