Direct production of lactic acid based on simultaneous saccharification and fermentation of mixed restaurant food waste

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

  • Daniel Pleissner
  • Francesca Demichelis
  • Silvia Mariano
  • Silvia Fiore
  • Ivette Michelle Navarro Gutiérrez
  • Roland Schneider
  • Joachim Venus

This study introduces to a one-step process for the fermentative production of L(+)-lactic acid from mixed restaurant food waste. Food waste was used as carbon and nitrogen source in simultaneous saccharification and fermentation (SSF) using Lactobacillus sp. or Streptococcus sp. strains for L(+)-lactic acid production. Waste consisted of (w/w) 33.5% starch, 14.8% proteins, 12.9% fat and 8.5% free sugars. Lactobacillus sp. strains showed a productivity of 0.27–0.53 g L−1 h−1 and a yield of 0.07–0.14 g g−1 of theoretically available sugars, while Streptococcus sp. more efficiently degraded the food waste material and produced lactic acid at a maximum rate of 2.16 g L−1 h−1 and a yield of 0.81 g g−1. For SSF, no enzymes were added or other hydrolytic treatments were carried out. Outcomes revealed a linear relationship between lactic acid concentration and solid-to-liquid ratio when Streptococcus sp. was applied. Statistically, from a 20% (w/w) dry food waste blend 52.4 g L−1 lactic acid can be produced. Experimentally, 58 g L−1 was achieved in presence of 20% (w/w), which was the highest solid-to-liquid ratio that could be treated using the equipment applied. Irrespective if SSF was performed at laboratory or technical scale, or under non-sterile conditions, Streptococcus sp. efficiently liquefied food waste and converted the released nutrients directly into lactic acid without considerable production of other organic acids, such as acetic acid. Downstream processing including micro- and nanofiltration, electrodialysis, chromatography and distillation gave a pure 702 g L−1 L(+)-lactic acid formulation.

OriginalspracheEnglisch
ZeitschriftJournal of Cleaner Production
Jahrgang143
Seiten (von - bis)615-623
Anzahl der Seiten9
ISSN0959-6526
DOIs
PublikationsstatusErschienen - 01.02.2017

Dokumente

DOI

Zuletzt angesehen

Publikationen

  1. Impact of prescribed burning on the nutrient balance of heathlands with particular reference to nitrogen and phosphorus
  2. Debating accounting and sustainability: from incompatibility to rapprochement in the pursuit of corporate sustainability
  3. Lernaufgaben in Form von Leittexten als methodischer Rahmen einer innovativen Berufsbildung für nachhaltige Entwicklung
  4. Rechtsangleichung zwischen Gemeinschafts- und Unionsrecht – die Richtlinie über die Vorratsdatenspeicherung vor dem EuGH
  5. Habitat invasion risk assessment based on Landsat 5 data, exemplified by the shrub Rosa rubiginosa in southern Argentina
  6. Weltanschauliche Voraussetzungen naturwissenschaftlicher Welterkenntnis im Dialog zwischen Naturwissenschaft und Glaube
  7. Revision des Fragebogens zur Leistungsmotivation für Schülerinnen und Schüler der vierten bis sechsten Klasse (FLM 4 – 6-R)
  8. Multiprofessionelle Teamarbeit in Kindertageseinrichtungen – Anfragen an fach- und hochschulische Qualifizierungskontexte
  9. Life Cycle Assessment of biogas production under the environmental conditions of northern Germany: Greenhouse gas balance
  10. Two temperatures for one thermostat: The evolution of policy attitudes and support for independence in Catalonia (1991–2018)
  11. Bird's Response to Revegetation of Different Structure and Floristics-Are "Restoration Plantings" Restoring Bird Communities?
  12. Kollektive Vernunft als Basis der Demokratie? Über Bedingungen gelungener Selbstregierung im Anschluss an Franz L. Neumann
  13. Plant resource-use characteristics as predictors for species contribution to community biomass in experimental grasslands
  14. KomPädenZ-ein Projekt zur Anrechnung erworbenen Wissens unter besonderer Berücksichtigung des Gender-Mainstreaming-Prinzips
  15. Protected habitats of Natura 2000 do not coincide with important diversity hotspots of arthropods in mountain grasslands
  16. Remediation of PAHs, NSO-Heterocycles, and Related Aromatic Compounds in Permeable Reactive Barriers Using Activated Carbon
  17. Platform for sustainable aviation fuels-combining ecological research and sustainability management with industrial needs
  18. Hochwasser- und Küstenschutz unter Klimawandelbedingungen als besonderes Aufgabengebiet von Partizipation und Kooperation
  19. Sozioökonomische Analyse von Pflegemaßnahmen zur Erhaltung von Heidelandschaften im Naturschutzgebiet Lüneburger Heide