PVA entrapped activated sludge beads coated with PAC for bioremediating 4-chlorophenol-bearing wastewater

Kuan-Shiong Khoo; Houy-Yng Lam; Zhen-Yin Lau; Alyna Ong Ching Wuie; Anissa Azlan; Hoe-Guan Beh; Jun-Wei Lim

Authors

Kuan-Shiong Khoo Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia Author
Houy-Yng Lam Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia Author
Zhen-Yin Lau Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia Author
Alyna Ong Ching Wuie Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia Author
Anissa Binti Azlan Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia Author
Hoe-Guan Beh Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia Author
Jun-Wei Lim Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia Author

Keywords:

Activated sludge, adsorption, bioregeneration, PAD coated beads, biomass entrapment, 4-chlorophenol

Abstract

This study compares the effectiveness of powdered activated carbon (PAC) to adsorb 4-chlorophenol (4-CP) from wastewater via coated onto and homogenised into polyvinyl alcohol (PVA) bead surface. The bioregeneration of spent PAC for repeated uses via entrapment with 4-CP acclimated biomass of activated sludge was also unveiled. Results showed that the maximum capacity of PAC adsorbing 4-CP was 0.2 g 4-CP/g PAC. It was confirmed that the PAC coated onto the bead surfaces with biomass entrapment could be used for eight cycles with the removal efficiency ranging from 80-85%. The removal rate of 4-CP was best fitted by the pseudo-first-order reaction kinetic, permitting plausibly projection to upscale for industrial application in treating wastewater containing chlorophenol more effectively.