Title: The use of polyaluminium chloride for removing colour, COD and ammonia from semi-aerobic leachate
Authors: Hamidi Abdul Aziz, Zawawi Daud, Mohd. Nordin Adlan, Yung-Tse Hung
Addresses: School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia. ' Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia. ' Civil Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak Darul Ridzuan, Malaysia. ' Department of Civil and Environmental Engineering, Cleveland State University, 16945 Deerfield Dr., Strongsville, OH 44136-6214, USA
Abstract: This research examined various experimental conditions for application of Polyaluminium Chloride (PAC) for removing colour, COD and ammonia from semi-aerobic. The removals of colour, COD and ammonia were up to 93%, 56% and 32%, respectively, at an optimum dosage of 2000 mg/L PAC. Rapid and slow mixing speed played only a minor role in the removal efficiencies for colour, COD and ammonia. The flocs size distribution for PAC coagulant shows an increase in floc size with increasing coagulant dosages. PAC also exhibited excellent settling characteristics, with majority of the flocs settled out in the initial 5 min of settling.
Keywords: semi-aerobic leachates; landfill; coagulation; flocculation; polyaluminium chloride; alum; ammonia removal; COD removal; chemical oxygen demand; colour removal; flocs.
International Journal of Environmental Engineering, 2009 Vol.1 No.1, pp.20 - 35
Published online: 11 Jun 2009 *Full-text access for editors Access for subscribers Purchase this article Comment on this article