BIOMASS RESOURCE ASSESSMENT ON THEORETICAL AND AVAILABLE POTENTIAL OF SUGARCANE USING LiDAR-DERIVED AGRICULTURAL LAND-COVER MAP IN VICTORIAS CITY, NEGROS OCCIDENTAL, PHILIPPINES

摘要

The Biomass Theoretical (B_n) and Available potential (B_(av)) of sugarcane's mill-based residue, bagasse, was assessed using LiDAR-derived Agricultural Land-cover Map and field survey-validated data in Victorias City, Negros Occidental. This baseline assessment aims to serve as input to a more detailed Biomass Resource Assessment for Bioenergy Development in the whole Province of Negros Occidental. The GIS-based calculation revealed that there is 1,842.71 hectares of cultivated land area (A_n) for sugarcane. The field survey data recorded an annual average crop yield of 62 metric tons/hectare. Utilizing the bagasse's crop-to-residue conversion factor of .29 kg bagasse/sugarcane, the derived residue yield (Y_n) is at 17.98 metric tons/hectare. Using the mathematical model: B_n = A_nY_n, the calculated B_n is 33,132 metric tons. Moreover, the field survey showed that Victorias Sugar Mill Corporation's efficiency of biomass collection (f_g) is at 100%. The lower heat value (LHV) based on Department of Energy derived values (DOE) is 16.56 megajoules for bagasse and the calculated availability of bagasse for energy production (a_n) is at 10%. Considering the 13,390 hectares total land area (A_r) of the city, using formula: B_(av) = (f_gB_na_nLHV_n)/A_r, the calculated B_m is 1.2M megajoules/hectare. Generally, the biomass resource assessment methodology used in this paper can be replicated to the rest of the cities and municipalities of Negros Occidental. Consequently, these detailed Municipal/City-based Biomass Resource Assessment Maps will be the major inputs of the provincial-based analysis of a suitable and optimal site for Bioenergy development.