In last years microalgae biomass has been used for several scopes. One of them is to investigate their use as energy products. In this work microalgae were studied for anaerobic digestion use, but, to do so with a positive cost/revenue ratio, the cell walls must be efficiently removed before that the anaerobic digestion process takes place. This is the only way to make available the organic matter for the microbial activity and consequently enhance quantity and quality of produced biogas. In this study were used Scendesmus obliquus strain treated with thermal, alkali and alkali-thermal pre-treatments. Samples of microalgae biomass were collected and subjected to a first pre-treatments test at 120°C (autoclave) for one hour and half. The second test was performed with an alkali pre-treatments using NaOH with a dosage range from 4 to 20% of the selected TS matrix (2, 5, 10% by weight). The last test was conducted using a hybrid pre-treatment (alkali – thermal), with the same dosage of NaOH and thermal exposition described above. Both tests with the use of NaOH showed a better efficiency in releasing intracellular organic matter and breaking polymeric bridges. Then biogas potential tests were performed under batch mesophilic conditions after each pre-treatment to evaluate possible enhancement in biogas production and quality.

THERMAL, ALKALI AND THERMO-ALKALI PRETREATMENTS APPLIED ON MONOSPECIFIC MICROALGAL BIOMASS TO IMPROVE ANAEROBIC BIOGAS PRODUCTION / Campo, Giuseppe; Riggio, VINCENZO ANDREA; Cerutti, Alberto; Ruffino, Barbara; Panepinto, Deborah; Zanetti, Mariachiara. - STAMPA. - (2017). ((Intervento presentato al convegno 15th International Conference on Environmental Science and Technology tenutosi a Rodi nel 31 Agosto - 2 settembre.

THERMAL, ALKALI AND THERMO-ALKALI PRETREATMENTS APPLIED ON MONOSPECIFIC MICROALGAL BIOMASS TO IMPROVE ANAEROBIC BIOGAS PRODUCTION

CAMPO, GIUSEPPE;RIGGIO, VINCENZO ANDREA;CERUTTI, ALBERTO;RUFFINO, BARBARA;PANEPINTO, DEBORAH;ZANETTI, Mariachiara
2017

Abstract

In last years microalgae biomass has been used for several scopes. One of them is to investigate their use as energy products. In this work microalgae were studied for anaerobic digestion use, but, to do so with a positive cost/revenue ratio, the cell walls must be efficiently removed before that the anaerobic digestion process takes place. This is the only way to make available the organic matter for the microbial activity and consequently enhance quantity and quality of produced biogas. In this study were used Scendesmus obliquus strain treated with thermal, alkali and alkali-thermal pre-treatments. Samples of microalgae biomass were collected and subjected to a first pre-treatments test at 120°C (autoclave) for one hour and half. The second test was performed with an alkali pre-treatments using NaOH with a dosage range from 4 to 20% of the selected TS matrix (2, 5, 10% by weight). The last test was conducted using a hybrid pre-treatment (alkali – thermal), with the same dosage of NaOH and thermal exposition described above. Both tests with the use of NaOH showed a better efficiency in releasing intracellular organic matter and breaking polymeric bridges. Then biogas potential tests were performed under batch mesophilic conditions after each pre-treatment to evaluate possible enhancement in biogas production and quality.
978-960-7475-53-4
File in questo prodotto:
File Dimensione Formato  
CEST2017_Campo et al2017.docx

non disponibili

Descrizione: Extended abstract
Tipologia: 1. Preprint / submitted version [pre- review]
Licenza: Non Pubblico - Accesso privato/ristretto
Dimensione 617 kB
Formato Microsoft Word XML
617 kB Microsoft Word XML   Visualizza/Apri   Richiedi una copia
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: https://hdl.handle.net/11583/2685438
 Attenzione

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