Estimating Optimal Combination Of Palm Oil Fuel ASH In Kaolin As Landfill Linner Using Statistical Experimental Design Approach

Abstract

The optimization level of ground palm oil fuel ash combined with industrial kaolin clay for sanitary earthen landfill liner design was investigated.  Corresponding effect of % palm oil fuel ash (POFA) dosage level on two critical compaction parameters; optimum moisture contents [] and [] was examined.  Optimization process was performed using one-factor-at-a-time [OFAT] response methodology. The relationships between the responses of interest, [] and [] with respect to % POFA dosage level, as single variable factor was determined.  Invoking Analysis of Variance [ANOVA] on response data in Design-Expert software reports that outcome of both parameters are statistically significant at 99% confidence level.  An optimal % POFA dosage level of approximately 14% was achieved using the one variable at time graphical response method and MATLAB programming software.