20.500.12556/RUL-132331 Effect of pressure on the removal of NH$_3$ from hydrolyzed and pre-fermented slaughterhouse waste for better biomethanization 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. slaughterhouse waste hydrolyzes pressure pilot-scale ammonia biogas klavniški odpadki hidroliza pritisk amonijak bioplin true false true Angleški jezik Slovenski jezik Članek v reviji 2021-10-21 14:42:01 2021-10-21 14:42:02 2022-09-12 04:11:56 0000-00-00 00:00:00 2019 0 0 11 str. iss. 10, art. 1868 Vol. 12 2019 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.31 1996-1073 10.3390/en12101868 9222777 RAZ_Zver_Ales_2019.pdf RAZ_Zver_Ales_2019.pdf 1 59DEF153A900FB59A36E1339CDF96FA9 4b7a0bc9fe7a8da08e254e581b6090ef0469dbdf9e4acb1de564599e031b95cc af1335f3-326c-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=149939 https://www.mdpi.com/1996-1073/12/10/1868 0 aa6b973f-326c-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=149938 Biotehniška fakulteta 0 0 0