Rice Straw Bioethanol Market Behavior in Pila, Laguna: Challenges and Efficiency Through Value Chain Analysis and Stochastic Price Simulations

Abstract

 Rice straw, in terms of its chemical composition, is dominated by pentose in its hemicellulose, giving it potential for bioethanol utility. Within the context of the Philippines, rice straws, as a post-harvest waste, are often discarded or burnt in open fields by farmers after the harvesting season. Under the premise of waste commodity frontiers in a circular economy, wastes are seen as a resource that can be reintegrated into the generating capital. Integral to this theme is the waste-to-energy (WTE) approach, which utilizes wastes as a source of energy in the form of electricity, fuel, or heat. This study aims to assess the market efficiency of rice-straw-based bioethanol in Pila, Laguna. Regarding support service providers, the value chain suggests an institutional hybridity, characterized by a conglomerate of government agencies, civil society organizations, and academic institutions. When compared to the prices of existing rice strawbased markets (fodder, mushroom mulch, paper, and walis tambo), the Average Variance Ratio (VR) and Granger Causality Count results for rice straw-based bioethanol suggest high levels of market efficiency (VR = 1.0321). This is indicative of how rice straw-based bio-ethanol markets are influenced by technology and production costs rather than direct price spillovers for other rice-straw utilities. For integrating rice-straw-based markets into current economic arrangements, incremental niche markets are suggested, acknowledging competition from the established markets of corn silage and sugarcane (for bioethanol production), on which producer and consumer behavior may still be path-dependent.