Nitrogen Recovery from Different Livestock Slurries with an Innovative Stripping Process

Ali Heidarzadeh Vazifehkhoran, Alberto Finzi, Francesca Perazzolo, Elisabetta Riva, Omar Ferrari and Giorgio Provolo
Additional contact information
Ali Heidarzadeh Vazifehkhoran: Department of Agricultural and Environmental Sciences, University of Milan, Via G. Celoria, 2, 20133 Milano, Italy
Alberto Finzi: Department of Agricultural and Environmental Sciences, University of Milan, Via G. Celoria, 2, 20133 Milano, Italy
Francesca Perazzolo: Department of Agricultural and Environmental Sciences, University of Milan, Via G. Celoria, 2, 20133 Milano, Italy
Elisabetta Riva: Department of Agricultural and Environmental Sciences, University of Milan, Via G. Celoria, 2, 20133 Milano, Italy
Omar Ferrari: Department of Agricultural and Environmental Sciences, University of Milan, Via G. Celoria, 2, 20133 Milano, Italy
Giorgio Provolo: Department of Agricultural and Environmental Sciences, University of Milan, Via G. Celoria, 2, 20133 Milano, Italy

Sustainability, 2022, vol. 14, issue 13, 1-17

Abstract: Ammonia (NH 3 ) emissions deriving from the management of livestock manure have a significant environmental impact, and therefore it is important to reduce them. Among the available options, the process of NH 3 stripping is promising to remove NH 3 from manures and digestates recovering it as a mineral fertilizer (e.g., ammonium sulfate) that is more widely adoptable on farms. The traditional stripping process takes place in batches; however, in this study, a continuous process was evaluated using a lab scale plant in which four reactors were used in series with different hydraulic retention times (HRTs) of 12 or 20 days. The NH 3 recovery of each reactor was studied for the liquid fraction of pig slurry, dairy cattle slurry and digestate, applying simple headspace aeration. For 20 days of HRT, totals of 92%, 83% and 67% of NH 3 were stripped from the digestate, pig slurry and dairy cattle slurry, respectively. For 12 days of HRT, total NH 3 recoveries were 83%, 60% and 41% for the digestate, pig slurry and dairy cattle slurry, respectively. The inlet NH 3 concentration and inlet total alkalinity had a positive and negative effect, respectively, on the specific NH 3 removal rate for each reactor. Stripping NH 3 on farm scale can abate NH 3 emissions in response to the environmental concerns of European policies.

Keywords: manure management; nitrogen recovery; aeration; ammonia stripping; alkalinity (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/2071-1050/14/13/7709/pdf (application/pdf)
https://www.mdpi.com/2071-1050/14/13/7709/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:14:y:2022:i:13:p:7709-:d:846707

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().