It had been researched about kinetics of degradation petroleum {sludge) in soil using synergy of bacterial Consortium and plants Leucaena leuchepala. Initial concentration of TPH = 5.8835%. Contaminated soil by petroleum were added adding fresh soil, bulking agent 10%, and nutrient with ratio N;P;K = 10:1:0.1. Order reaction definite by integral method. Constant determination with integral meth…