Conceptual decision support system to optimise strategic decisions in biomass-for-bioenergy supply chains

摘要

This paper presents a conceptual decision support system (DSS) to optimise strategic decisions in the biomass-for-bioenergy (B4B) supply chain. This DSS combines three integrated modules: (i) a generic and flexible database, (ii) an optimisation module and (iii) a query tool. The non-spatial component of the database covers the possible product types and the possible techniques to harvest, collect, store, pre-treat and convert biomass to bioenergy with their attributes on the one hand, and their mutual relationships and possible sequences on the other hand. Spatial information regarding the (multi-modal) transportation network and the location of the (potential) biomass production sites, storage facilities and conversion facilities are maintained in the spatial component of the database. The optimisation module comprises a mixed integer linear programming (MILP) model to select the optimal location, technology and capacity of operations and operation facilities. Simultaneously, the MILP model determines the optimal allocation of raw biomass materials, intermediate products and by-products from the biomass production site to operation facilities and between operation facilities. These strategic decisions are optimised regarding economic, energetic or environmental objectives and are restricted by the biomass-for-bioenergy supply chain and the transportation network defined in the database module. The query tool (developed in a GIS software) allows the user to organise and pre-process the source data and visualise and post-process the results. The functionalities of the conceptual DSS are illustrated by means of a simplified B4B supply chain based on low input high diversity (LIHD) biomass systems in the province of Limburg (Belgium).