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Identifier

000434407

Title

Production and purification of L-lactic acid from food waste of the municipality of Heraklion

Alternative Title

Παραγωγή και καθαρισμός του L-γαλακτικού οξέος από υπολείμματα τροφών του δήμου Ηρακλείου

Author

Ρεντούμης, Ιωάννης Δ.

Thesis advisor

Βελώνια, Κέλλυ

Reviewer

Παυλίδης, Ιωάννης
Μανιός, Θρασύβουλος

Abstract

Societies around the world are facing serious challenges due to the thoughtless use of plastics derived from petrochemical derived synthetic polymers. In addition to the extensive use of oil sources, all these plastics end up in the ecosystem as industrial waste, resulting in a large environmental problem. According to the Food and Agriculture Organization (FAO), almost one-third of the total food produced annually is getting lost or wasted, in the food supply chain. Any solutions to these issues are required in order to reduce this tremendous environmental impact. In previous decades many authors described Lactic Acid (LA) production from several waste sources, including molasses, bakery waste, water waste, and sugar cane. Lactic acid, 2-hydroxypropanic acid, is an organic compound which is widely used in food, pharmaceutical and chemical industries. In addition, lactic acid can be polymerized to form the biodegradable and compostable polylactic acid (PLA), which is considered a potential substitute for oilproduced plastics. The present study particularly focuses on the optimization of lactic acid production from Municipal Food Waste (MFW), for the development of a scalable synthetic process. More specifically, a sequence consisting of subsequent fermentations to convert endogenous D, Llactic acid from minced foods to optically pure L-lactic acid, followed by purification of Llactic acid by ammonium lactate (NH₄LA) esterification and hydrolysis of the purified ester. These steps were performed in order to achieve optimization of bioplastic production for the municipal food waste of Heraklion and to obtain useful information for the design of a pilot unit. The yields and limitations of this process will be discussed.

Language

English

Subject

Bioplastic

Bιοπλαστικά

Fermentation

L-lactic acid

L-γαλακτικό οξύ

Zύμωση

Issue date

2020-11-27

Collection