@article{201708.0033, doi = {10.20944/preprints201708.0033.v1}, url = {https://doi.org/10.20944/preprints201708.0033.v1}, year = 2017, month = {August}, publisher = {Preprints}, author = {Abubakar M. Ali and Mohd A. Abu-Hassan and Raja R.K. Ibrahim and Muhammad A. A. Zaini and Bala I. Abdulkarim and Ali S. Hussein and Sheila M. Su and Muhd Azril I. Mohd Halim}, title = {Characterization of Petroleum Sludge from Refinery Industry Biological Wastewater Treatment Unit}, journal = {Preprints} }