Integrating environmental value stream mapping and life cycle assessment to identify improvement priorities in community-based waste supply chains
More details
Hide details
1
Department of Industrial Engineering, Universitas Dian Nuswantoro, Nakula I Street No. 1, Pendrikan Kidul, Semarang City, Central Java 50131, Indonesia
2
Master's Program in Artificial Intelligence, Universitas Dian Nuswantoro, Gedung I lantai 1, Nakula Street I no. 1, Pendrikan Kidul, Semarang City
Corresponding author
Pramudi Arsiwi
Department of Industrial Engineering, Universitas Dian Nuswantoro, Nakula I Street No. 1, Pendrikan Kidul, Semarang City, Central Java 50131, Indonesia
KEYWORDS
TOPICS
ABSTRACT
Community-based waste-processing facilities can reduce the amount of waste sent to landfills, but their operational constraints and environmental burdens may arise at different stages. This study examined five waste-processing facilities in Semarang, Indonesia, by interpreting Environmental Value Stream Mapping (EVSM) findings alongside site-specific Life Cycle Assessment (LCA) results. The EVSM data covered process and residence times, resource and energy use, fuel consumption, noise, and reported emissions. Processing was a prominent operational concern in several facilities, whereas the main LCA contributions differed by waste stream and treatment pathway. The selected results identified contributions from residual-waste transportation, product distribution, shredding, incineration, fermentation, and landfill disposal. At BSB Mijen, processing had a reported CO₂ value of 128.23 kg/day. Distribution used 24 L of diesel/day and had a reported CO₂ value of 64.32 kg/day. Across the five cases, the EVSM and LCA hotspots were not consistently located at the same process stage. Examining them together helped identify process-level priorities for further assessment.