Bio-electrochemical remediation of real field petroleum sludge as an electron donor with simultaneous power generation facilitates biotransformation of PAH: Effect of substrate concentration

► BET represents a new approach for effective real-field petroleum sludge remediation. ► Real-field petroleum sludge acted as an electron donor for power generation. ► Fate of twelve individual PAHs was evaluated under variable substrate concentration. ►In situ potential mediated multiple reactions enhanced the TPH degradation.