In recent years, several studies focused on developing processes aimed at recovering nutrients such as nitrogen. In this paper, a real plant for ammonia stripping has been tested on a real aqueous waste in order to optimize the process conditions (air flow rate and pH). The results of a finite element mathematical model were compared with the ones of experimental tests. The results showed that 500 Nm3/h was the minimum flow rate necessary to allow reaching ammonia nitrogen removals close to 80% in 9 hours of stripping (reactor operating in semi-batch mode). Moreover, the tests showed the possibility of increasing the pH value by exploiting the alkalinity that characterizes the digestates without the dosage of reagents for basification (e.g. NaOH).

Optimum operating conditions for a real scale ammonia stripping tower: an experimental case

Rada, Elena Cristina
;
Torretta, Vincenzo
;
Carnevale Miino, Marco
2020-01-01

Abstract

In recent years, several studies focused on developing processes aimed at recovering nutrients such as nitrogen. In this paper, a real plant for ammonia stripping has been tested on a real aqueous waste in order to optimize the process conditions (air flow rate and pH). The results of a finite element mathematical model were compared with the ones of experimental tests. The results showed that 500 Nm3/h was the minimum flow rate necessary to allow reaching ammonia nitrogen removals close to 80% in 9 hours of stripping (reactor operating in semi-batch mode). Moreover, the tests showed the possibility of increasing the pH value by exploiting the alkalinity that characterizes the digestates without the dosage of reagents for basification (e.g. NaOH).
2020
ammonia recovery; ammonia stripping; circular economy; reactor operating in semi-batch mode
Collivignarelli, Maria Cristina; Rada, Elena Cristina; Torretta, Vincenzo; Baldi, Marco; Carnevale Miino, Marco
File in questo prodotto:
File Dimensione Formato  
172-UPB-Stripping-Torretta-2020.pdf

non disponibili

Tipologia: Versione Editoriale (PDF)
Licenza: Copyright dell'editore
Dimensione 484.94 kB
Formato Adobe PDF
484.94 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

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/11383/2094890
 Attenzione

L'Ateneo sottopone a validazione solo i file PDF allegati

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact