Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (5): 893-902.doi: 10.1016/j.cjche.2017.09.018

• Review •     Next Articles

Bioregeneration of spent activated carbon: Review of key factors and recent mathematical models of kinetics

Kwok-Yii Leong1, Siew-Leng Loo2, Mohammed J. K. Bashir3, Wen-Da Oh4, Pasupuleti Visweswara Rao5,6, Jun-Wei Lim7   

  1. 1 Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Dr. 2, Singapore 117576, Singapore;
    2 Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Clean Tech One, #05-05, Singapore 637141, Singapore;
    3 Department of Environmental Engineering, Faculty of Engineering and Green Technology(FEGT), Universiti Tunku Abdul Rahman, 31900 Kampar, Perak, Malaysia;
    4 Residues & Resource Reclamation Centre, Nanyang Environment and Water Research Institute(NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore;
    5 Bio Product Development Program, Faculty of Agro-Based Industry, Universiti Malaysia Kelantan, 17600 Jeli, Malaysia;
    6 Institute of Food Security and Sustainable Agriculture, Universiti Malaysia Kelantan, 17600 Jeli, Malaysia;
    7 Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia
  • Received:2017-07-25 Revised:2017-09-21 Online:2018-05-28 Published:2018-06-29
  • Contact: Jun-Wei Lim,E-mail

Abstract: The disposal of spent activated carbon (AC) will inevitably create secondary pollution. In overcoming this problem, the spent AC can be regenerated by means of biological approach. Bioregeneration is the phenomenon in which through the action of microorganisms, the adsorbed pollutants on the surface of the AC will be biodegraded and this enables further adsorption of pollutants to occur with time elapse. This review provides the challenges and perspectives for effective bioregeneration to occur in biological activated carbon (BAC) column. Owing to very few reported works on the bioregeneration rate in BAC column, emphasis is put forward on the recently developed models of bioregeneration kinetic in batch system. All in all, providing potential solutions in increasing the lifespan of AC and the enhancement of bioregeneration rate will definitely overcome the bottlenecks in spent AC bioregeneration.

Key words: Bioregeneration, Spent activated carbon, Modeling of bioregeneration kinetic, Concentration gradient, Exoenzyme