Bioremediation is the waste management technique that involves the utilization of organisms to get rid of or neutralize pollutants from a contaminated site. Nutrient supplementation for petroleum hydrocarbon degradation In biostimulation technology,  has traditionally focused on addition of nitrogen (N) and phosphorus (P), either organically or inorganically. The effects of nutrients (i.e. NPK), aeration and biostimulation of indigenous soil microorganisms and inoculation of extraneous microbial consortia on the bioremediation of oil contaminated soil are investigated. Waste materials have a robust potential within the bioremediation of oil-contaminated sites, due to their richness in nutrients and their economical feasibility. We used sewage sludge, soybean flour , and wheat straw to biostimulate oil degradation during a heavily contaminated desertic soil . While oil degradation was assessed by Maintaining the produced CO2 and by using gas chromatography–mass spectrometry (GC–MS), shifts in bacterial community composition were monitored using illumina MiSeq. The addition of sewage sludge and wheat straw to the desertic soil stimulated the respiration activities to succeed in 3.2–3.4 times above within the untreated soil, whereas the addition of soybean flour resulted in an insignificant change within the produced CO2, given the high respiration activities of the soybean flour alone. Bioremediation approaches for the treatment of oily sludge from a refinery were evaluated employing a 23 factorial design. The three strategies were  tested and  bioaugmentation with indigenous microbial consortia (MO) isolated from oily sludge, biostimulation with nutrients (NP) and biostimulation with the surfactant Triton X-100 (TX). Eight experimental runs were conducted in triplicate with factor settings as per the 23 design. The main effects and varied interactions of the factors on oil degradation and microbial growth in suspension were evaluated during a 30 day study. Multifactor ANOVA could reveal the many effects while the traditional order score approach failed during this scenario. Biostimulation with nutrients with the sort of nitrate and phosphate, also as biostimulation with Triton X-100, was positive and significant when both oil degradation and microbial growth in suspension were chosen because the response variables. However, the most effect of bioaugmentation was only significant for oil degradation but was insignificant for microbial growth at a 90% confidence level. The MO–NP binary interaction and therefore the MO–NP–TX ternary interactions were positive and significant, indicating the synergistic effect of those strategies on oil degradation and microbial growth. All other binary interactions were found to be insignificant.