The oil sludge generated by refineries is one of the major sources of environmental pollution and are categorised as hazardous waste by Environment Protection Act and Hazardous Wastes Handling Rules. Bharat Petroleum’s Corporate Research & Development Centre developed this concept to replace the earlier process of bio-remediated sludge that used to take 6-10 months and was very expensive. Through this new process, the Company’s R&D team has not only came up with quick and environmentally acceptable solution; but also made it cost effective compared to earlier process.