Effect of pressure on the removal of NH$_3$ from hydrolyzed and pre-fermented slaughterhouse waste for better biomethanization

Zver, Aleš (avtor), Bernik, Rajko (avtor), Mihelič, Rok (avtor)

Slaughterhouse waste (SW) is potentially a good source of biomethane; however, its excessive ammonia content quickly causes inhibition of microbial processes. Our aim was therefore to remove ammonia from SW before putting it into a biogas reactor. Experimental 120 L pressure container was constructed to observe NH$_3$ removal from diluted slaughterhouse waste at constant air flow of 144 NL/min, temperature 130 °C, and at different pressures: 300 kPa, 600 kPa, and 900 kPa. SW was first allowed to hydrolyze for 14 days at 38 °C. The SW was diluted with water (DSW) to 8.4% dry matter (DM) and forcibly aerated for 334 min. From the DSW, 0.7%, 3.8%, and 9% of initial total N were removed at 300 kPa, 600 kPa, and 900 kPa, respectively. However, the C/N ratio changed only slightly, from the initial 4.38 to 3.17, which is not a promising result for biomethanization. Further research on the presented system with the addition of bases might be promising to remove more ammonia.

• Jezik: Angleški jezik
• Ključne besede: slaughterhouse waste, hydrolyzes, pressure, pilot-scale, ammonia, biogas
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2019
• Št. strani: 11 str.
• Številčenje: Vol. 12, iss. 10, art. 1868
• PID: 20.500.12556/RUL-132331
• UDK: 621.31
• ISSN pri članku: 1996-1073
• DOI: 10.3390/en12101868
• COBISS.SI-ID: 9222777
• Datum objave v RUL: 21.10.2021

Gradivo je del revije

• Naslov: Energies
• Skrajšan naslov: Energies
• Založnik: Molecular Diversity Preservation International
• ISSN: 1996-1073
• COBISS.SI-ID: 518046745

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 16.05.2019

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: klavniški odpadki, hidroliza, pritisk, amonijak, bioplin

Projekti

• Financer: EC - European Commission
• Program financ.: European Social Fund

• Financer: Drugi - Drug financer ali več financerjev
• Program financ.: Ministry of Higher Education, Science and Technology of the Republic of Slovenia