Valorisation of solid biowastes: The lactic acid alternative |
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| Affiliation: | 1. Leibniz Institute for Agricultural Engineering and Bioeconomy, Max-Eyth-Allee 100, Potsdam, Germany;2. The University of Manchester, Department of Chemical Engineering and Analytical Sciences, Manchester M13 9PL, UK;1. Leibniz Institute for Agricultural Engineering Potsdam-Bornim, Max-Eyth-Allee 100, 14469 Potsdam, Germany;2. Cenicafé, National Coffee Research Center, Sede Planalto, km. 4 via Chinchiná-Manizales, Manizales (Caldas), Colombia;1. Material Resource Efficiency Division, CSIR-Indian Institute of Petroleum, Mohkampur, Dehradun 248005, India;2. Analytical Sciences Division, CSIR- Indian Institute of Petroleum, Mohkampur, Dehradun 248005, India;3. Centre for Climate and Environmental Protection, School of Water, Energy and Environment, Cranfield University, Cranfield MK43 0AL, UK;1. Department of Chemical and Biochemical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark;2. Faculty of Materials, Civil and Environmental Engineering, University of Bielsko-Biala, Willowa 2, 43-309 Bielsko-Biala, Poland;1. Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-Ku, Fukuoka 812-8581, Japan;2. Botany and Microbiology Department, Faculty of Science (Boys-Branch), Al-Azhar University, PN:11884, Nasr City, Cairo, Egypt;1. DIATI, Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Torino, Italy;2. Sustainable Chemistry (Resource Efficiency), Institute of Sustainable and Environmental Chemistry, Leuphana University of Lüneburg, C13.203, 21335 Lüneburg, Germany;3. Leibniz Institute for Agricultural Engineering and Bioeconomy Potsdam, Max-Eyth-Allee 100, 14469 Potsdam, Germany |
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| Abstract: | Solid biowastes (SBW) are organic residues from gardens and parks, food wastes from kitchens, organic municipal solid wastes and comparable side streams from food processing plants. Without proper treatment, SBW represent an environmental hazard. Several initiatives around the world are dedicated to developing more effective systems for the treatment of this constantly growing ‘resource’. The chemical composition of SBW, rich in carbohydrates, proteins and lipids, makes it a good substrate to produce biobased materials through fermentation. Amongst them, lactic acid (LA), considered one of the top ten green molecules of the future, has attracted huge interest because of its many uses as an intermediate chemical. This review gathers the most important learnings from fermentation of SBW to LA, providing an overview of the process steps while highlighting some of the current limitations to overcome. Despite their complexity, results suggest that some of the SBW could be good substrates in LA fermentations and that biosynthesis of LA should be regarded as part of the whole waste management solution. |
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| Keywords: | Enzymatic hydrolysis Fermentation Food wastes Organic fraction of municipal solid wastes Garden wastes Polylactic acid |
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