Optimization of electron beam irradiation and ionic liquid pretreatment of oil palm frond

The pretreatment of oil palm frond (OPF) had been carried out using Electron Beam Irradiation (EBI) and followed with 1-ethyl-3- thylimidazolium acetate [EMIM][OAc] pretreatment. The purpose of the pretreatment are to analyse the optimal condition to get low CrI and LOI value. The lower the CrI and LOI value will lead to high effective for conversion to simple monomer sugar. The decreasing trend of crystallinity index contribute to the effectiveness is high the effectiveness with the highest speed, the longer time taken and highest value of dosage should be used. For FTIR, the result obtained are not reliable to further the optimization method. Negative effectiveness are not realiable to continue optimization of LOI. The value of LOI before undergo ionic liquid pretreatment, has achieved the rule of thumb where by, high dosage will give out high effectiveness of and lower value of LOI. The parameter need to be optimize are time, speed for Bio-shake IQ and irradiation dosage. Range of time from 1 hour to 4 hours and speed from 400 rpm to 800 rpm. For irradiation dosage, the range is 100kGy to 500kGy. The effects of EBI dosage, speed of Bioshake reactor and retention time on Crystallinity Index (CrI) were investigated by applying Box Behnken Design of Response Surface Methodology (RSM). The optimum pretreatment for CrI conditions prediction of low OPF crystallinity index are at the retention time 2.76 h, Bio-shake speed 646.46 rpm and EBI dose was 358.59 kGy. Also, the highest EBI dosage, the longer the time mixing and the highest the speed will increase the effectiveness of the pretreatment. For the parameter that analyse by XRD had successfully achieved.