Potential Use of Polyaluminium Chloride and Tobacco Leaf as Coagulant and Coagulant Aid in Post-Treatment of Landfill Leachate

A study was conducted to treat stabilized leachate by applying polyaluminium chloride (PAC) and tobacco leaf extract as a coagulant and coagulant aid. Experimental results indicated that the tobacco leaves were positively charged. The removal rate of the chemical oxygen demand, using ۱۵۰۰ mg/L PAC as a sole coagulant, was approximately ۶۳% and increased to ۹۱% when ۱۰۰۰ mg/L PAC was mixed with ۱۰۰۰ mg/L tobacco leaf. Additionally, ۱۵۰۰ mg/L PAC with ۲۵۰ - ۱۰۰۰ mg/L tobacco leaf and ۵۴% ammoniacal nitrogen was removed, compared with only ۴۶% reduction using ۱۵۰۰ mg/L with only ۴۶% reduction.