In our days biogas plants are more and more common at farm facilities and the management of the digestate raise some concern for the possible emissions to air. The aim of this study was to evaluate how the mechanical separation affects ammonia (NH3) and greenhouse gas (GHG) emissions from the storage of the different fractions obtained from separation of codigested slurry. Flux measurements were estimated with static and dynamic systems on untreated digestate (UDS) and the solid (SF) and liquid (LF) fractions after separation during 32 days of storage. In the static system the UDS emitted less than the treated digested slurry (TDS = SF + LF), evidencing an important role of the total solids content in the emission process. On the contrary in the dynamic system UDS emitted more than the others fraction; in this case it seems that the emission driving force is the nitrogen content. Results also demonstrated that, not always NH3 emissions can be effectively measured both with photoacoustic gas analyser or the widely diffused acid trap method.

Effect of mechanical separation of digested slurry on greenhouse gas and ammonia emissions during storage / F. Perazzolo, G. Mattachini, A. Finzi, G.M. Provolo - In: Recycling of organic residues in agriculture: from waste management to ecosystem services / [a cura di] G. Vallez, P. Cambier, H. Bacheley, N. Cheviron, S. Formisano, A.S. Lepeuple, A. Revallier, S. Houot. - Versailles : INRA / Veolia Recherche & Innovation, 2013. - ISBN 9782738013378. - pp. 1-4 (( Intervento presentato al 15. convegno RAMIRAN International Conference tenutosi a Versailles nel 2013.

Effect of mechanical separation of digested slurry on greenhouse gas and ammonia emissions during storage

F. Perazzolo;G. Mattachini;A. Finzi;G.M. Provolo
2013

Abstract

In our days biogas plants are more and more common at farm facilities and the management of the digestate raise some concern for the possible emissions to air. The aim of this study was to evaluate how the mechanical separation affects ammonia (NH3) and greenhouse gas (GHG) emissions from the storage of the different fractions obtained from separation of codigested slurry. Flux measurements were estimated with static and dynamic systems on untreated digestate (UDS) and the solid (SF) and liquid (LF) fractions after separation during 32 days of storage. In the static system the UDS emitted less than the treated digested slurry (TDS = SF + LF), evidencing an important role of the total solids content in the emission process. On the contrary in the dynamic system UDS emitted more than the others fraction; in this case it seems that the emission driving force is the nitrogen content. Results also demonstrated that, not always NH3 emissions can be effectively measured both with photoacoustic gas analyser or the widely diffused acid trap method.
Settore AGR/10 - Costruzioni Rurali e Territorio Agroforestale
http://ramiran.uvlf.sk/doc13/Proceeding_2013/homepage.html
Book Part (author)
File in questo prodotto:
File Dimensione Formato  
S9.02_Ramiran 2013.pdf

accesso riservato

Tipologia: Post-print, accepted manuscript ecc. (versione accettata dall'editore)
Dimensione 872.55 kB
Formato Adobe PDF
872.55 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
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: https://hdl.handle.net/2434/585575
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact