Techno-economic analysis of a food waste valorisation process for lactic acid, lactide and poly(lactic acid) production
Autor: | Yunzi Hu, Carol Sze Ki Lin, Tsz Him Kwan |
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Rok vydání: | 2018 |
Předmět: |
0106 biological sciences
Lactide Renewable Energy Sustainability and the Environment Animal feed Strategy and Management food and beverages 010501 environmental sciences Pulp and paper industry 01 natural sciences Industrial and Manufacturing Engineering Lactic acid Food waste chemistry.chemical_compound Waste treatment chemistry 010608 biotechnology Production (economics) Environmental science Valorisation Lactic acid fermentation 0105 earth and related environmental sciences General Environmental Science |
Zdroj: | Journal of Cleaner Production. 181:72-87 |
ISSN: | 0959-6526 |
DOI: | 10.1016/j.jclepro.2018.01.179 |
Popis: | A sustainable food waste valorisation process was proposed by designing a plant with a capacity of 10 metric tons (MT) hour−1 of food waste powder with a 20-year lifetime. Three scenarios were proposed with different products: Scenario I) lactic acid, Scenario II) lactide, Scenario, and III) poly(lactic acid) (PLA). Mass balance showed conversion yields of 3.1 MT of 80% lactic acid, 1.7 MT of lactide, and 1.3 MT of poly(lactic acid) from 10 MT of food waste powder. All scenarios were economically feasible, but Scenario I had the highest annual net profits (US$ 22,184,169), internal rate of return (31.1%), net present value (US$234,803,060) and the shortest payback period (5.1 years) at a discount rate of 5%. The minimum selling prices of lactic acid, lactide and poly(lactic acid) were US$943 MT−1, US$2073 MT−1 and US$3330 MT−1, respectively. Sensitivity analysis showed that the prices of lactic acid, lactide and poly(lactic acid) were the largest determinants of the profitability in the plant while the sale of by-products (animal feed) was also critical to the plant's economics. This work has cast insights on the techno-economic performance of a sustainable food waste treatment under a decentralised approach in urban areas. |
Databáze: | OpenAIRE |
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