Financial Analysis of Feasibility for a Heat Utilization System Using Rice Straw Pellets - Heating Energy Demand and the Collection and Storage Method in Nanporo, Japan

Authors: K. Ishii, T. Furuichi, A. Fujiyama, S. Hariya

Abstract:

Rice straw pellets are a promising fuel as a renewable energy source. Financial analysis is needed to make a utilization system using rise straw pellets financially feasible, considering all regional conditions including stakeholders related to the collection and storage, production, transportation and heat utilization. We conducted the financial analysis of feasibility for a heat utilization system using rice straw pellets which has been developed for the first time in Nanporo, Hokkaido, Japan. Especially, we attempted to clarify the effect of factors required for the system to be financial feasibility, such as the heating energy demand and collection and storage method of rice straw. The financial feasibility was found to improve when increasing the heating energy demand and collecting wheat straw in August separately from collection of rice straw in November because the costs of storing rice straw and producing pellets were reduced. However, the system remained financially unfeasible. This study proposed a contractor program funded by a subsidy from Nanporo local government where a contracted company, instead of farmers, collects and transports rice straw in order to ensure the financial feasibility of the system, contributing to job creation in the region.

Keywords: Rice straw, pellets, heating energy demand, collection, storage.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1096707

References:

[1] New Energy Foundation, “Japanese projects for bioethanol production from rice straw,” 2011. http://www.asiabiomass.jp/english/topics/ 1101_02.html.
[2] J.S. Lim, Z.A. Manan, S.R. Wan Alwi, H. Hashim, “A review on utilization of biomass from rice industry as a source of renewable energy,” Renewable and Sustainable Energy Reviews, vol.16, pp. 3084-3094, 2012.
[3] K. Ishii, T. Furuichi, S. Watanabe, Y. Tomokawa, “A study of influencing factors on quality of rice straw pellets,” The Proceedings of 28th International Conference on Solid Waste Technology and Management, CD-ROM, 2013.
[4] Nanporo local government, “Feasibility study on effective utilization of rice straw, rice husk and wheat straw in Nanporo town,” 2009. (in Japanese)
[5] Hearing investigation to Nanporo local government.