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http://dx.doi.org/10.17137/korrae.2020.28.2.41

Extraction of organic carbon from the condensate of food waste dry feed process  

Kim, Min-Kyung (Department of Civil & Environmental Engineering, Hanyang University)
Kwon, Ki-Wook (Dongwoo Bio.,CO)
Mo, Kyung (Department of Civil & Environmental Engineering, Hanyang University)
Cui, Feng-Hao (Department of Civil & Environmental Engineering, Hanyang University)
Park, Se-Yong (Bioresource Center, Institute for Advanced Engineering)
Kim, Moon-Il (Department of Civil & Environmental Engineering, Hanyang University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.28, no.2, 2020 , pp. 41-48 More about this Journal
Abstract
In this study, organic carbon was extracted from the condensed water of food waste drying process to estimate the applicability as external organic carbon sources. The COD, TN, TP and TS of condensed water were 21,374 mg/L, 148 mg/L, 4.19 mg/L, and 455.7 mg/L, respectively. In addition, the content of biodegradable organics in condensed water was 47%. The fractional distillation and the vacuum evaporation were employed for extracting organic carbon. There were 8 extraction conditions, but 4 conditions were available for extraction. They were 1) 0mmHg, 110℃ 2) -600mmHg, 70℃ 3) -500mmHg, 80℃ 4) -600mmHg, 80℃. All 4 conditions showed the highest organic concentration and the highest quantity of organics when extracted 10% of initial volume. It was estimated that optimum conditions were 80℃, -600mmHg and 10% extraction. Then, extraction concentration, extraction quantity, extraction efficiency, extraction time, BOD/TCOD ratio, TVFAs/TCOD ratio and NH3-N were 174,200 mg/L, 8,710 mg, 46%, 10 min, 0.97, 0.74 and 75.5 mg/L respectively. Therefore, the extracted organic carbon can be utilized as external organic carbon sources.
Keywords
Food waste; Drying process; Condensate; Organic carbon; External carbon source;
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