Cho, Si-Kyung Lee, Mo-Kwon Kim, Dong-Hoon Yun, Yeo-Myeong Jung, Kyung-Won Shin, Hang-Sik Oh, Sae-Eun 2024-01-20T10:02:22Z 2024-01-20T10:02:22Z 2021-09-05 2014-04 0256-1115 https://pubs.kist.re.kr/handle/201004/126908 Ultrasonication was applied to lower the ammonia level in livestock waste to enhance the anaerobic digestion performance. In simulated waste tests, in spite of an identical temperature increase, a higher ammonia removal rate was observed at lower frequency. This could be explained by the existence of athermal effects, accounting for 64% of the total ammonia removal rate. These effects originated from various convections (micro-streaming, micro-convection, shock-waves, and micro-jets), possibly caused by stable bubbles, and this indigenous mixing ability led to a negligible effect of aeration in the ultrasound assisted ammonia stripping process. In actual waste tests, an ammonia removal rate of up to 55% was achieved with a 0.77 h(-1) mass transfer rate coefficient. After ultrasonication (28 kHz, pH 11, 15 min) of livestock waste, 58% higher CH4 yield was achieved due to the decrease of ammonia concentration (28%) and enhanced solubilization (51%). English KOREAN INSTITUTE CHEMICAL ENGINEERS LANDFILL LEACHATE INHIBITION SLUDGE WATER ULTRASOUND NITROGEN PRETREATMENT RECOVERY MANURE Enhanced anaerobic digestion of livestock waste by ultrasonication: A tool for ammonia removal and solubilization Article 10.1007/s11814-013-0284-4 1 KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.31, no.4, pp.619 - 623 KOREAN JOURNAL OF CHEMICAL ENGINEERING 31 4 619 623 scie scopus kci ART001859527 000334177800011 2-s2.0-84897575618 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article LANDFILL LEACHATE INHIBITION SLUDGE WATER ULTRASOUND NITROGEN PRETREATMENT RECOVERY MANURE Ammonia Inhibition Ultrasonication Stable Bubble Livestock Wastewater Anaerobic Digestion