The fruit yield is approximately 180 kg/palm per year. As residue, the kernel shell accounts for 30% of the fruit biomass in oven-dried weight (Lee et al. 1990), and the quantity corresponds to double the extracted flesh fiber (Guo et al. 2008). The content of lignin in the kernel shell is high (Abnisa et al. 2011); hence numerous low-molecular- weight phenolic compounds are expected to be formed by lignin hydrolysis, although the quantity of kernel shell generated by mills is less than that of EFB.