This work concerns the investigation of the sequential production of lactic acid (LA) and biogas from food waste (FW). LA was produced from FW using a Streptococcus sp. strain via simultaneous saccharification and fermentation (SSF), and separate enzymatic hydrolysis and fermentation (SHF). Via SHF a yield of 0.33 gLA/gFW (productivity 3.38 gLA/L.h) and via SSF 0.29 gLA/gFW (productivity 2.08 gLA/L.h) was obtained. Fermentation residues and FW underwent anaerobic digestion (3 wt% TS). Biogas yields were 0.71, 0.74 and 0.90 Nm3/kgVS for FW and residues from SSF and SHF respectively. The innovation of the approach consists of considering the conversion of FW into two different high value products through a biorefinery chain, therefore making economically feasible LA production and valorising its fermentative residues. Finally, a mass balance involved three different process outlines with the aim to assess the amount of LA and biogas that may be generated within different scenarios.

Investigation of food waste valorization through sequential lactic acid fermentative production and anaerobic digestion of fermentation residues / Demichelis, Francesca; Pleissner, Daniel; Fiore, Silvia; Mariano, Silvia; Navarro Gutiérrez, Ivette Michelle; Schneider, Roland; Venus, Joachim. - In: BIORESOURCE TECHNOLOGY. - ISSN 0960-8524. - STAMPA. - 241:(2017), pp. 508-516. [10.1016/j.biortech.2017.05.174]

Investigation of food waste valorization through sequential lactic acid fermentative production and anaerobic digestion of fermentation residues

DEMICHELIS, FRANCESCA;FIORE, Silvia;MARIANO, SILVIA;
2017

Abstract

This work concerns the investigation of the sequential production of lactic acid (LA) and biogas from food waste (FW). LA was produced from FW using a Streptococcus sp. strain via simultaneous saccharification and fermentation (SSF), and separate enzymatic hydrolysis and fermentation (SHF). Via SHF a yield of 0.33 gLA/gFW (productivity 3.38 gLA/L.h) and via SSF 0.29 gLA/gFW (productivity 2.08 gLA/L.h) was obtained. Fermentation residues and FW underwent anaerobic digestion (3 wt% TS). Biogas yields were 0.71, 0.74 and 0.90 Nm3/kgVS for FW and residues from SSF and SHF respectively. The innovation of the approach consists of considering the conversion of FW into two different high value products through a biorefinery chain, therefore making economically feasible LA production and valorising its fermentative residues. Finally, a mass balance involved three different process outlines with the aim to assess the amount of LA and biogas that may be generated within different scenarios.
File in questo prodotto:
File Dimensione Formato  
BITE-D-17-0161 post-print.pdf

non disponibili

Descrizione: post print editoriale
Tipologia: 2a Post-print versione editoriale / Version of Record
Licenza: Non Pubblico - Accesso privato/ristretto
Dimensione 1.35 MB
Formato Adobe PDF
1.35 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
BITE-D-17-01612.pdf

embargo fino al 31/05/2019

Descrizione: postprint
Tipologia: 2. Post-print / Author's Accepted Manuscript
Licenza: Creative commons
Dimensione 881.76 kB
Formato Adobe PDF
881.76 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/2684885
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo