Life cycle and economic assessment of sugarcane bagasse valorization to lactic acid
| Autor: | Meghana Munagala, Sanjay Patil, Kakasaheb Konde, Yogendra Shastri, Ketaki Nalawade |
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| Rok vydání: | 2020 |
| Předmět: |
Life Cycle Stages
020209 energy Context (language use) 02 engineering and technology 010501 environmental sciences Pulp and paper industry 01 natural sciences Lactic acid Saccharum chemistry.chemical_compound chemistry 0202 electrical engineering electronic engineering information engineering Production (economics) Environmental science Animals Scenario analysis Lactic Acid Activity-based costing Sugar Bagasse Cellulose Waste Management and Disposal Life-cycle assessment 0105 earth and related environmental sciences |
| Zdroj: | Waste management (New York, N.Y.). 126 |
| ISSN: | 1879-2456 |
| Popis: | In this work, detailed life cycle assessment (LCA) and techno-economic analysis (TEA) of a novel lactic acid (LA) production process from sugarcane bagasse is performed, with the objective of identifying process improvement opportunities. Moreover, this is first such study in the Indian context. Experimental data generated at the Vasantdada Sugar Institute (VSI) for upstream processes is combined with ASPEN Plus simulation of the downstream steps for a commercial plant producing 104 tonnes per day of LA. Equipment sizing is performed and costing is done using standard approaches. OpenLCA is used to develop the LCA model and Ecoinvent database is used to quantify life cycle impacts for 1 kg of LA. Different scenarios for the LA plant are studied. Results showed that the pretreatment stage was crucial from both economic and environmental perspectives. The total life cycle climate change impact for production of 1 kg of lactic acid was 4.62 kg CO2 eq. The product cost of LA was USD 2.9/kg, and a payback time of 6 years was achieved at a selling price of USD 3.21/kg. Scenario analysis has revealed that lactic acid plant annexed to a sugar mill led to significant environmental and economic benefits. Sensitivity analysis has identified opportunities to reduce the life cycle climate change impact to 2.29 kg CO2 eq. and product cost to USD 1.42/kg through reduced alkali consumption, higher solid loading, and reduced enzyme loading. |
| Databáze: | OpenAIRE |
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