In order to evaluate the potential of OPF to function as a carbon source in the biochemical industries, an accurate protocol on biomass compositional analysis is inevitable. Standard laboratory analytical procedures (LAPs) developed by National Renewable Energy Laboratories (NREL) can be considered as reliable guidelines in this regard. These standard analytical procedures help scientists and researchers to determine the chemical composition of lignocellulosic biomass feedstock and process intermediates for its conversion into biofuels, bioproducts etc. [23]. The analytical method also enables the understanding of the economic potential and environmental impacts of biomass conversion processes. NREL is the characterization method focusing on the fermentability of biomass. This is different from the previous OPF characterization reports [15] and [24], in which acid detergent fiber (ADF), neutral detergent fiber (NDF) and acid detergent lignin (ADL) procedures or TAPPI method are followed which are, however, more related to the pulp and paper industries [25]. LAPs developed by NREL can quantify the type of structural carbohydrate (e.g., glucan, xylan, arabinan or others) more specifically to determine its potential as a carbon source during fermentation.