Factors limiting bioremediation technologies
The use of microorganisms to destroy, or reduce the concentration of, hazardous wastes on a contaminated site is called bioremediation. Such a biological treatment system has various applications, including, clean up of contaminated sites such as water, soils, sludges, and waste streams.
Bioremediation of petroleum pollutants
Hydrocarbon-degrading microorganisms are ubiquitously distributed in soil and aquatic environments. Populations of hydrocarbon-degraders normally constitute less than 1% of the total microbial communities, but when oil pollutants are present these hydrocarbon-degrading populations increase, typically to 10% of the community. 
Biosurfactants and oil bioremediation
Oil pollution is an environmental problem of increasing importance. Hydrocarbon-degrading microorganisms, adapted to grow and thrive in oil-containing environments, have an important role in the biological treatment of this pollution. 
Bioremediation: A Sustainable Tool for Environmental Management – A Review
Bioremediation is considered as one of the safer, cleaner, cost effective and environmental friendly technology for decontaminating sites which are contaminated with wide range of pollutants. Various industrial and anthropogenic activities resulted in increased contaminated sites due to unawareness regarding production, use and disposal of hazardous substances. The process of bioremediation uses various agents such as bacteria, yeast, fungi, algae and higher plants as major tools in treating oil spills and heavy metals present in the environment. 
Culture-Independent Analysis of Bacterial Community Composition during Bioremediation of Crude Oil-Polluted Soil
Aim: To use cultivation-independent techniques based on DGGE of PCR-amplified 16S rRNA gene and to evaluate bacterial community composition during bioremediation of crude oil-polluted soil. 
 Boopathy, R., 2000. Factors limiting bioremediation technologies. Bioresource technology, 74(1), pp.63-67.
 Atlas, R.M., 1995. Bioremediation of petroleum pollutants. International Biodeterioration & Biodegradation, 35(1-3), pp.317-327.
Ron, E.Z. and Rosenberg, E., 2002. Biosurfactants and oil bioremediation. Current opinion in biotechnology, 13(3), pp.249-252.
 Kumar, G. S. and Thatheyus, A. J. (2013) “Bioremediation of Chromium, Nickel and Zinc in Electroplating Effluent by Escherichia coli”, Annual Research & Review in Biology, 3(4), pp. 913-920. Available at: http://www.journalarrb.com/index.php/ARRB/article/view/24958 (Accessed: 17March2020).
 Blaise Chikere, C. (2012) “Culture-Independent Analysis of Bacterial Community Composition during Bioremediation of Crude Oil-Polluted Soil”, Microbiology Research Journal International, 2(3), pp. 187-211. doi: 10.9734/BMRJ/2012/1565.